BIBLIOGRAPHICAL SKETCH. 35 



The following new genera and species are described, but no figures are given : 



Ostrea patereula. 

 Pterinea spinalafa. 

 Aviculopecten Caroli. 



— tenuieostus. 



Pernopecten, nov. gen., limceformis. 



— limatus. 



— Shumardanus. 

 Pinna ? Mavshallensis. 



Myalina Lowensis. 

 Edmondia ? hicarinata. 



— cequimarffinalis. 



— Burlingtonensis. 

 Sanguinolites strigatus. 



— concentricus. 



— Hannihalensis, Shumard. 

 Sanguinolaria rostrata. 



1865. Several species of Carboniferous Lamellibrancliiata are listed in Huxley 

 and Btheridge's ' Catalogue of the Collection of Fossils in the Museum of Practical 

 G-eology,' but nothing new is enumerated, and no descriptive details are added. 



1865. In the ' Proceedings of the Academy of Natural Science of Philadelphia ' 

 for 1865 is a paper by Messrs. Meek and Worthen, entitled" Contributions to the 

 Palgeontology of Illinois and other Western States," in which the following 

 Lamellibranchs are described from Carboniferous beds (p. 245) : 



Litliophaga ? lingualis. 

 Pleuropliorus suicostatus. 



— .'' angulatus. 



— costatiformis. 

 Conocardium olliquum. 



Edmondia ? peroblonga, 

 Chienomya f rhomboidea. 



— '' hgbrida. 

 Sedgwickia {Sanguinolites'/) suharcuata. 



1865. In vol. xiv of the ' Smithsonian Contributions to Knowledge ' for 

 1865 is a memoir entitled " Palaeontology of the Upper Missouri : Invertebrates," 

 by Meek and Hayden. A new arrangement of the genera allied to Avicula is 

 proposed, pp. 27, 30, and 51, thus : 



PTBRIID^ = AvicuLiD^. 



1. Pteriniinae. — " Cartilage apparently occupying a series of linear furrows, 

 ranging more or less nearly parallel to the cardinal margin in a usually broad, 

 flattened cardinal facet or area. Anterior muscular scar sometimes moderately 

 developed and deep." 



Pterinia, Myalina, Amhonychia, and probably Actinodesma, Qryphorhynchus, 

 Eurydesnia, and several undefined Palceozoic groups. 



2. Pteriinx (or Aviculinse). — " Cartilage mainly or entirely confined to a single 

 more or less defined depression or cavity behind the beaks. Anterior muscular 

 impression very small." 



Pteroperna, Pteria (or Avicula), Ilargaritifern, Malleus, Aucella, and Eunticrotis ; 

 also probably Mono/is, Halolia, Pteronites, and Posidonomya. 



