^°189r''] PROCEEDINGS OF 'FHE NATIONAL MUSEUM. 443 



221a. Cerithiuni maculosum KitMier. 



var. = 6'. aduHlnm, Ki<Mi('r. 



Hood and Charles islands, Wlmmer; Duncan, James, and Indefat- 

 igable islands, Albatross; Galapagos Islands, National Museum. 



Family MODULIDil^:. 



Genus MODULUS Gray. 

 222. Modulus cerodes A. Ad. 

 Hood Island, Albatross. 



Family PLANAXID^. 

 GciiUH PL AN AXIS Laniarcli. 

 223. Planaxis planicostata Shy. 

 Galapagos Islands, Carpenter. 



Family VERMETTDiE, 

 Genus SIPHONIUM Morcli. 



224. Siphonium margaritarum Val. 



Hood Island, Wimmer. 



Gcuu« VERMETUS Morcli. 

 Subgenus SERPULORBIS SaHsc. 



225. Serpulorbis squamigerus Cpr, 



Hood, James, and Indefatigable islands. Albatross^, Galapagos 

 Islands, Wimmer. 



226. Serpulorbis pellucidus Hrod. 

 Hood Island, Winnncr. 



227. Serpulorbis pellucidus Brod. 

 YnT. 2iJanorl)oide8=^Serpith( reyiilaris Cbeui. 



Hood Island, Wimmer. 



Subgenus ALETES Garpenter. 

 228. Aletessp. 

 Hood Island, Albatross. 



Family LITTORINIDiE. 

 Genus LITTORINA lYrussar. 

 229. Littorina porcata I'liil. 

 Galapagos Islands, Carpenter. 



