MUSEUM OF COMPARATIVE ZOOLOGY. 3l>1 



Family PIIASTANELLID7E. 



Genus PIIASIANKLLA Lamauck. 



Section EUCOSMIA Carpenter. 



Phasianella (Eucosmia) brevis ORmoNY. 



Plate XIX. Fig. 10 b. 



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

 P. breiis C. B. Adams. 



Habitat. Cuba and Martinique, Orbign3^ Station 21, ofF Bahia Honda, in 

 287 I'ms., Blake Expedition. Off the coast of North Carolina, in 15-03 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 pulchella, 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. affiiiis, tessellata, concinna, and conculor of C. B. Adams, and umhilicata, of 

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



Family TURBINID^. 

 Genus LEPTOTHYRA Carpenter. 



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



Not Lepto)ii/x Gray, 1837, gen. Phocidm. 

 Collonia Philippi, 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 Titrbo sanguineus Linnd, 

 which had been erroneously confounded with Collonia by several authors. 

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



