{"title":"宾夕法尼亚纳加德家族的专著","authors":"A. Ortmann","doi":"10.5962/p.48330","DOIUrl":null,"url":null,"abstract":"ditional material was incidentally secured in 1905 and 1906, while he was hunting for crawfishes. In 1907 the collecting of mussels was systematically begun, and the particularly favorable seasons of 1908 and 1910, and in part also of 1909, permitted the taking of large numbers of species and specimens. Not only the shells but also the soft parts were collected, and the writer endeavored to find both males and females, the latter in the sterile as well as in the gravid state. In this he generally was successful, and a great quantity of material representing","PeriodicalId":341755,"journal":{"name":"Memoirs of the Carnegie Museum","volume":"12 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1911-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"34","resultStr":"{\"title\":\"A monograph of the Najades of Pennsylvania\",\"authors\":\"A. Ortmann\",\"doi\":\"10.5962/p.48330\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"ditional material was incidentally secured in 1905 and 1906, while he was hunting for crawfishes. In 1907 the collecting of mussels was systematically begun, and the particularly favorable seasons of 1908 and 1910, and in part also of 1909, permitted the taking of large numbers of species and specimens. Not only the shells but also the soft parts were collected, and the writer endeavored to find both males and females, the latter in the sterile as well as in the gravid state. In this he generally was successful, and a great quantity of material representing\",\"PeriodicalId\":341755,\"journal\":{\"name\":\"Memoirs of the Carnegie Museum\",\"volume\":\"12 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1911-02-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"34\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Memoirs of the Carnegie Museum\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.5962/p.48330\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Memoirs of the Carnegie Museum","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5962/p.48330","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
ditional material was incidentally secured in 1905 and 1906, while he was hunting for crawfishes. In 1907 the collecting of mussels was systematically begun, and the particularly favorable seasons of 1908 and 1910, and in part also of 1909, permitted the taking of large numbers of species and specimens. Not only the shells but also the soft parts were collected, and the writer endeavored to find both males and females, the latter in the sterile as well as in the gravid state. In this he generally was successful, and a great quantity of material representing
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