MUSEUM OF COMPARATIVE ZOOLOGY. 351 



Family PHASIANELLID^. 



Genus PHASIANELLA Lamarck. 



Section EUCOSMIA Carpenter. 



Phasianella (Eucosmia) brevis Orbignt. 



Plate XIX. Fig. 10 b. 



Phasianella brevis Orbigny, Moll. Cuba, II. p. 79, pi. xx. figs. 19-21, 1842. Not 

 P. brevis C. B. Adams. 



Habitat. Cuba and Martinique, Orbigny. Station 21, off Bahia Honda, in 

 287 fms., Blake Expedition. Off the coast of North Carolina, in 15-63 fms., 

 bottom temperature 75°.0 F., at Stations 2595, 2596, 2597, 2612, 2615, 2619, 

 U. S. Fish Commission. 



The P. brevis of C. B. Adams is merely a young specimen of the shell he 

 had previously named Turbo putchella, which is a very pretty form of Phasia- 

 nella with rather marked spiral sculpture and a flattened nucleus. It has the 

 usual operculum of the genus. Other species recognized during this investiga- 

 tion as occurring in the Antillean region, but not obtained by the Blake, are 

 P. affinis, tesscllata, concinna, and conculor of C. B. Adams, and umbilicata of 

 Orbigny. There are several other nominal species requiring further study. 



Family TTJRBINIDtE. 

 Genus LEPTOTHYRA Carpenter. 



Leptonyx Carpenter, and A. Adams, Proc. Cal. Acad. Sci., III. p. 175, Nov., 1864. 



Not Leptonyx Gray, 1837, gen. Phocidoz. 

 Collonia Pliilippi, Handbuch d. Conch., p. 206, not of Gray. Not Collonia Gray, 



1852. (Type, Delphinula marginata Lam.) 

 Leptothyra (Carpenter MS.) Dall, Am. Journ. Conch., VII. p. 130, 1871. (Type, 



Turbo sanguineus Linne'.) Pilsbry, Tryon Man., X. p. 245, 1888. 

 Collonia (sp.) H. & A. Adams, Gray, Watson, etc. 



The genus Collonia of Gray, according to Dr. P. P. Carpenter, was founded 

 on the Delphinula marginata of Lamarck, a smooth Grignon fossil with large 

 crenate umbilicus. It was defined as having an "operculum circular, with 

 many gradually enlarged whorls, with a convex external rib and central pit." 

 Afterward the genus fell into great confusion from the confounding of names 

 of totally distinct species called marginata, etc., all of which may be found 

 particularly detailed in Dr. Carpenter's paper above referred to. There he 

 proposed the name Leptonyx for the group typified by Turbo sanguineus Linne, 

 which had been erroneously confounded with Collonia by several authors. 

 This Turbo sanguineus is a species found in the Mediterranean, with near rela- 



