144 HERTLEIN AND STRONG 



PLATE A 



Fig. 1. Latirus tuberculatus (Broderip). From Loc. 27221 (C.A.S.), 

 Black Bight at south end of Banks Bay, about 1 mile north 

 of Tagus Cove, Albemarle Island, Galapagos Islands. 

 X 1.04. p. 128. 



Fig. 2. Acmaea mitella Menke. From the same locality as the speci- 

 men shown in Fig. 1. X 1.6. p. 140. 



Fig. 3. Acmaea mitella Menke. View of the interior of the specimen 

 shown in Fig. 2. X 1.6. 



Fig. 4. Cheilea equestris (Linnaeus). From Loc. 27227 (C.A.S.), 

 Bassa Point, Chatham Island, Galapagos Islands. X 1.4. 

 p. 139. 



Fig. 5. Cheilea equestris (Linnaeus). From the same locality as the 

 specimen shown in Fig. 4. X 1.38. View of the interior of a 

 smaller specimen. 



Fig. 6. Acmaea filosa Carpenter. From the same locality as the 

 specimen shown in Fig. 4. X 1.6. p. 140. 



Fig. 7. Fissurella obscura Sowerby. From the same locality as the 

 specimen shown in Fig. 1. X .8. p. 141. 



Fig. 8. Monilispira ochsneri Hertlein & Strong. Holotype, No. 9426 

 (Calif. Acad. Sci. Dept. Geol. Type Coll.), from Loc. 23207 

 (C.A.S.), Chatham Island, Galapagos Islands. X 1.6. p. 126. 



Fig. 9. Nassarius nodicinctus (A. Adams). From the same locality 

 as the specimen shown in Fig. 1. X 1.6. p. 129. 



Fig. 10. Pyrene haemastoma (Sowerby). From the same locality as 

 the specimen shown in Fig. 1. X 1.05. p. 130. 



Fig. 11. Chione pertincta Dall. From the same locality as the speci- 

 men shown in Fig. 1. X .8. View of the exterior of a left 

 valve, p. 122. 



Fig. 12. Hipponix grayanus Menke. From the same locality as the 

 specimen shown in Fig. 1. X 1.3 p. 138. 



Fig. 13. Cardita megastropha (Gray). From Loc. 2725SA (C.A.S.), 

 on beach along west side of South Seymour Island, Gala- 

 pagos Islands. X .9. View of exterior of a left valve, p. 120. 



Fig. 14. Apolymetis cognata (Pilsbry & Vanatta). Fromthe same 

 locality as the specimen shown in Fig. 1. X .58. View of the 

 exterior of a right valve, p. 123. 



Fig. \S. Apolymetis cognata (Pilsbry & Vanatta). From the same 

 locality as the specimen shown in Fig. 14. X .6. View of the 

 exterior of a left valve. 



Fig. 16. Apolymetis cognata (Pilsbry & Vanatta). View of the in- 

 terior of the specimen shown in Fig. 15. X .6. 



Fig. 17. Cymatium costatum (Born). From the same locality as the 

 specimen shown in Fig. 13. X .78. Anterior portion of shell 

 incomplete, p. 134. 



Fig. 18. Cymatium lineatum (Broderip). From the same locality as 

 the specimen shown in Fig. 1. X 1.1 p. 135. 



Fig. 19. Acanthina grandis (Gray in Sowerby). From the same lo- 

 cality as the specimen shown in Fig. 1. X 1. p. 132. 

 All the specimens illustrated on this plate are in the type collection 

 of the Department of Geology of the California Academy of Sciences. 



