NEW SPECIES OF SILURIAN FOSSILS FROM THE ED:N'IUNDS 

 AND PEMBROKE FORMATIONS OF WASHINGTON 

 COUNTY, MAINE. 



By Henry Shaler Williams, 



Of Cornell University, Ithaca, New Yorh. 



INTRODUCTION. 



In preparing the Eastport folio of the United States Geological 

 Survey for pubhcation the more characteristic fossils of the Silurian 

 formations there mapped were selected for illustration. Among 

 them the following were new, and as the folio is an inconvenient place 

 for publishing descriptions of new species, the following paper will 

 describe and illustrate a few of the more common and characteristic 

 new species found in the Edmunds and Pembroke formations of 

 Washington County, Maine. The type-specimens of all of these new 

 species are in the collections of the United States National Museum, 

 and the catalogue numbers under which they are registered are indi- 

 cated in the following descriptions. For greater precision the Geo- 

 logical Survey locality numbers and my own numbers given to indi- 

 vidual specimens are also noted wherever necessary. 



The species from the Edmunds formation are: 



Whitfieldella edmundsi. Palaeopecten cobscooH. 



Chonetes edmundsi. Palaeopecten transversalis. 



Chonetes cobscooki. Tolmaia compestris. 



Brachyprion shaleri. Pterinea (f Tolmaia) trescotti. 



The Pembroke species are: 



Chonetes bastini. Grammysia pembrohensis. 



Camarotoechia leightoni. Lingula minima var. americana. 



Actinopteria bella. Modiolopsis leightoni. 



Actinopteriafornicata. Modiolopsis leightoni var. quodraJta. 



Actinopteria dispar. Nuculites corrugata. 



Lingula scobina. Leiopteria rubra. 



On plate 30, illustrating the Pembroke fauna, are also included 

 figures of Dalmanella lunata (Sowerby), and on plate 31, Eurymyella 

 shaleri var. minor, WiUiams, the type of which was described from 

 the Eastport formation,^ (formation No. V), and figures of Platij- 



1 Proc. U. S. Nat. Mus., vol. 42, p. 387, pi. 49, fig. 9. 



Proceedings U. S. National Museum, Vou 45— No. 1985. 



319 



