MARINE MOLLUSKS OF THE GALAPAGOS 141 



Family Trochidae 



Tegula cooksoni (E, A. Smith) 

 Localities: Albemarle Island, Loc. 27221 (C.A.S,), 65 specimens; 

 Indefatigable Island, Loc. 27232 (C.A.S.) , 1 specimen. 



Tegula snodgrassi (Pilsbry & Vanatta) 



Locality: Albemarle Island, Loc. 27221 (C.A.S.), 75 specimens in- 

 cluding many young shells. 



Calliostoma sp. 



Locality: Albemarle Island, Loc. 27221 (C.A.S.), 1 very young 

 specimen. 



Family Neritidae 



Nerita funiculata Menke 

 Locality: Chatham Island, Loc. 27227 (C.A.S.), 1 specimen. 

 This species has usually been cited in the literature under the name 

 of Nerita bernhardi Recluz, 1858, a nomen nudurn. 



Nerita scabricosta ornata Sowerby 



Localities: Chatham Island, Loc. 27227 (C.A.S.), 2 specimens; 

 Tower Island, Loc. 27231 (C.A.S.), 1 specimen. 



Family Fissurellidae 



Fissurella obscura Sowerby 



Plate A, Fig. 7 

 Localities: Albemarle Island, Loc. 27221 (C.A.S.), 6 adult and a 

 number of young specimens; Tower Island, Loc. 27231 (C.A.S.), 16 

 specimens; Chatham Island, Loc. 27227 (C.A.S.), 4 specimens; South 

 Seymour Island, Loc. 27255A (C.A.S.), 10 specimens. 



Fissurella rugosa Sowerby 

 Locality: South Seymour Island, Loc. 27255A (C.A.S.), 1 specimen. 



Diodora inaequalis (Sowerby) 



Localities: Albemarle Island, Loc. 27221 (C.A.S.), 50 specimens; 

 Chatham Island, Loc. 27227 (C.A.S.), 3 specimens; Indefatigable 

 Island, Loc. 27232 (C.A.S.), 12 specimens. 



