^°i89l''] proceedings of the national museum. 331 



186. Turbo (Prisogaster) niger Gray. 



Common ; numerous specimens. 



Pacasmayo. 



Oq beach and 10 to 20 feet above high-water mark. 



187. Astralium (Uvanilla) Buschii Phil. 



= U. inermis Kiener. 



Many examples. 



Payta; Manta; Panama. 



This shell is generally seen in collections with Kiener's name inermis 

 Gmel. attached, but Philippi's has priority by 7 years. One of the nine 

 specimens from Manta measured 1^ inches in diameter and 1^ inches 

 altitude. 



188. Pomaulax undosus Wood. 



Beach shell. 



Ballenas Bay, Lower California. 



189. Chlorostoma ater Lesson. 



= C. atriun Lessou Pilsbry. 

 Abundant. 



Pacasmayo. 



190. Chlorostoma gallina Fbs. var. 



Beach shells. 



Santa Margarita Island, off Lower California. 



191. Omphalius panamensis Phil. 



Three beach shells. 



Payta.. 



Heretofore credited only to Panama. 



192. Omphalius viridulus Gmel. 



Eight examples — four from each of the following places : 



Manta; Panama. 



A somewhat variable species. The Manta shells are of various sizes, 

 and exhibit greater variation in this respect than those from Panama. 



In using tlie specific name viridulus, I have followed Carpenter in his 

 Mazatlan Catalogue, as well as specimens distributed by him, and so 

 labeled. Pilsbry has given the above name to the East Coast form, 

 which is closely related, and to the West Coast form is assigned avarietal 

 position with the name reticulatum. It is not unlikely that he is right, 

 but as he has reduced to a varietal status other related forms, I retain 

 the first name as above, until time will permit a careful comparison of 

 the various species so combined. 



