122 



THE NAUTILUS. 



provenance of the specimens) that the present distribution of the 

 coast fauna antedates the present volume of the Amazonian dis- 

 charge, since it would seem incredible that so many thoroughly 

 littoral species should be able to cross the present area of some hun- 

 dreds of miles of fresh water in either direction. A few species 

 marked with an asterisk are inserted on Dr. v. Ihering's authority. 



Melampus flavus Gmel. 



Bulla striata Brug. 



Terebra cinerea Born, San Paulo. 



Conns verrucosus Hwass. 



Conns raus Hwas-s. 



Conns daucus Hwass. 



Drillia albinodata Reeve. 



Drillia albociucta C. B. Ads. 



Mangilia limonitella Dall. 



Olivella jaspidea Gmel. 



Olivella nivea Gmel. 



Marginalia bullata.* 



Marginella largillierti.* 



Volvarina fusca Sby. 



Mitra uodulosa Gmel. 



Turbinella ovoidea Kien.* 



Fasciolaria aurantiaca Lam.* 



Leucozonia cingulif'era Lam. 



Pisania pusio var. janeirensis 

 Orb. 



Tritonidea tincta Conr. (!) 



Nassa vibex Say, Rio. 



Nassa ambigua Mtg. 



Anachis albella C. B. Ads. 



Anachis catenata Sby. 



Nitidella nitidula Shy. 



Columbella mercatoria L. 



Mu rex pomum Gmel.* 



Coralliophila galea < 'b. 



Sistrum nodulosum C. B. Ads. 



Purpura Iwrnastoma Lam., typi- 

 cal, Rio ( irande do Sul. 



Purpura hii'inastoma var. trini- 

 tatensis Guppy. 



Janthina com munis Lam. 

 Janthina exigua, Bahia. 

 Tritonium tritouis var. nobile 



Conr. 



Tritonium femorale L. 

 Tritonium chlorostomum Lam. 

 Lambidium oniscus L. 

 Ranella ponderosa Reeve. 

 Cassis tuberosa.* 

 Dolium perdix* L., replacing D. 



galea of San Paulo. 

 Trivia suffusa Gray. 

 Cypnea cinerea Gmel. 

 Strom bus pugilis L., Bahia and 



southward. 

 Strombus costatus Gmel. (not 



south of Bahia, v.Ihr.). 

 Strombus gallus L. (not south of 



Bahia, v. Ihr.). 

 Cerithium literatuin Born. 

 Cerithi urn algicola C. B. Ads. ? 

 Cerithium atratum var. varia- 



bile ? Ads. 



Modulus modulus L. 

 Siphonium nebulosum Dillw. 

 Vermicularia spirata Phil. 

 Petalocouchus irregularis Orb. 

 Crepidula plana Say. 

 Amalthea antiquata L. 

 Capulus incurvatus Gmel. 

 Polynices porcellana Orb. 

 Polyuices lactea Gmel. 

 Polynices caudidissima Reel.,* 



replacing the next. 



