四、砂属根茎足类一种新种丁香属注记

H. B. Brady
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引用次数: 15

摘要

下面注释中提到的标本是去年秋天“特里同”号轮船在Faroë海峡航行时打捞出来的,并由约翰·默里先生(f.r.s.e.)交给我检查,这次考察的科学观察是在他的指导下进行的。这是一个众所周知的事实,位于苏格兰北部海岸和Faroë群岛之间的地区具有某些不寻常的有趣的特征,因为存在,并排,两个明显划分的地区,其中的底部温度相差16°或17°华氏度。这两个地区的深度非常相似,在450至640英寻之间,它们被一个平均深度约为250英寻的狭窄山脊隔开。这一现象的物理方面一直是许多讨论的主题,随之而来的生物条件几乎同样重要;事实上,就根足纲而言,很少有同样程度的领域如此充分地回报了调查的劳动。在1868年的第44次“闪电”探险中,由卡彭特博士和怀维尔·汤姆森爵士负责,在寒冷的地区发现了其他有趣的生物,大型的Lituoline有孔虫Reophax sabulosa,这种形式后来在“骑士游侠”号巡航时在同一地点附近获得,但从未在其他地方遇到过。与此同时,温暖的地区也发现了沙蚕,这是一种英国博物学家以前不知道的大型沙质物种。在1869年的“豪猪”考察中,在寒冷地区获得了后一属的另一种变种,星藤;在分界线附近,发现了一种全新的砂质类型,卡彭特博士将其命名为博特利纳。从这一事实来看,所有的标本都或多或少地出现了断裂,可以推断,这些试验在活着的时候是粘在一起的;但是碎块很多,都是粗大的管子,许多管子有一英寸多长,里面是由不规则的沙隔板组成的迷宫。最近,在1880年,在“K夜游船”的巡航中,在温暖地区和寒冷地区发现了罕见的Storthosphœra属,Cornusjpira的标本直径超过一英寸,大小与热带最细小的轨道石相媲美,因此是已知最大的Porcellanoug有孔虫之一。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
IV. Note on syringammina, a new type of arenaceous rhizopoda
The specimens to which the following note refers were dredged in the Faroë Channel in the autumn of last year, during the cruise of H. M. S. “Triton,” and were sent to me for examination by Mr. John Murray, F. R. S. E., under whose direction the scientific observations of the expedition were carried out. It is now a well-known fact that the region lying between the north coast of Scotland and the Faroë Islands possesses certain features of unusual interest owing to the existence, side by side, of two sharply defined areas, of which the bottom temperature differs to the extent of 16° or 17° Fahr. The depth of the two areas is very similar, ranging from 450 to 640 fathom s, and they are separated by a narrow ridge having an average depth of about 250 fathoms. The physical aspects of this phenomenon have been the subject of much discussion, and the biological conditions attendant thereupon are of almost equal importance; indeed, so far as the Rhizopoda are concerned, there are few areas of the same extent that have so well repaid the labour of investigation. On the 44 "Lightning” Expedition of 1868, supei-intended by Dr. Carpenter and Sir Wyville Thomson, the cold area furnished amongst other interesting organisms, the large Lituoline Foraminifer Reophax sabulosa, a form which has since been obtained near the same point on the cruise of the "Knight Errant," but has never been met with elsewhere. The warm area yielded at the same time Astrorhiza arenaria, a large sandy species previously unknown to British naturalists. On the "Porcupine” Expedition of 1869, another modification of the latter genus, Astrorhiza crassatina was obtained in the cold area; and near the boundary line an entirely new arenaceous type was dredged, to which the generic named Botellina has been assigned by Dr. Carpenter. From the fact that all the specimens of the form appeared more or less broken, it has been inferred that the tests were adherent when living; but the fragments were abundant and consisted of stout tubes, many of them upwards of an inch in length, the interior being subdivided by a labyrinth of irregular sandy partitions. More recently, in 1880, on the cruise of the “K night Errant,” the rare genus Storthosphœra was found in the warm region and in the cold area specimens of Cornusjpira which measured more than an inch in diameter, rivalling in size the finest of the tropical Orbitolites, and therefore amongst the largest known Porcellanoug Foraminifera.
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