138 HERTLEIN AND STRONG 



Family Rissoidae 



Alvania galapagensis Bartsch 

 Localities: Albemarle Island, Loc. 27221 (C.A.S.), 25 specimens; 

 Tower Island, Loc. 27231 (C.A.S.)j 14 specimens. 



Alvania halia Bartsch 



Localities: Tower Island, Loc. 27231 (C.A.S.), 6 specimens; Inde- 

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



Alvania lara Bartsch 



Localities: Tower Island, Loc. 27231 (C.A.S.), 7 specimens; Inde- 

 fatigable Island, Loc. 27232 (C.A.S.), 75 specimens. 



Alvania sp. 

 Locality: Albemarle Island, Loc. 27221 (C.A.S.), 300 specimens. 



Family Rissoinidae 



Rissoina dina Bartsch 

 Locality: Albemarle Island, Loc. 27221 (C.A.S.), 200 specimens. 



Rissoina cf. R. laurae (de Folin) 



Locality: Albemarle Island, Loc. 27221 (C.A.S.), 10 badly worn 

 specimens. 



Rissoina signae Bartsch 

 Localities: Albemarle Island, Loc. 27221 (C.A.S.), 5 specimens; 

 Tower Island, Loc. 27231 (C.A.S.), 14 specimens; Indefatigable Island, 

 Loc. 27232 (C.A.S.), 13 specimens. 



Family Hipponicidae 



Hipponix antiquatus (Linnaeus) 



Localities: Albemarle Island, Loc. 27221 (C.A.S.), 9 specimens; 

 Tower Island, Loc. 27231 (C.A.S.), 10 specimens; Indefatigable Island, 

 Loc. 27232 (C.A.S.), 32 specimens. 



Hipponix gray anus Menke 

 Plate A, Fig. 12 



