5»0 ' . '■■ ■ ■•:::: AXEL a;- OLSSON V 



EXPLANATION OF PLATE 17 

 Figure •"Fage 



1-lb. Lima (Promaiitellum) pacifica d'Orbigny .170 



Fig. 1, height 34 mm.; Fig. la. height 34.6 mm. Boca Pan, Peru. 

 PRI 25597; Fig. lb, height 32 mm. Bayovar, Peru. PRI 25598. 



2. Crenella cautiva, new species 130 



Height 2.3 mm. Santa Elena, Ecuador. Holotype, ANSP 218961. 



3. Lima (Submaiitellum) orMgnyi Lamy 170 



Height 24 mm. Manta, Ecuador. PRI 25599. 



4. Lima (Lima) tetrica Gould .......:..; 169 



Figure copied after Gould, 1857. 



5. Julia thecaphora (Carpenter) :..... -^:j--142 



Figured after Carpenter's manuscript sketch. USNM. 



6-6a. Ostrea (Alectryonia) palmiila Carpenter ...173 



Fig. 6a, height 48 mm.; Fig. 6a, height 42 mm. Camarones near 

 Esmeraldas, Ecuador. PRI 25600. 



7-7a. Crenella ecuadoriana Pilsbry and Olsson .....130 



Fig. 7, height 3.1 mm.; Fig. 7a, height 2.7 mm. Santa Elena, Ecuador. 

 PRI 25803. 



8. Ostrea ( — ) tubulifera Dall 174 



Inside and outside view, diameter 45 mm. Gulf of California. 

 Holotype, USNM. 



9-9a. Aeila (Acila) divericata burica Olsson 57 



Copied after Olsson, 1942. Length 32 mm. Pliocene, Burica Peninsula, 

 Panama. 



10. Semlmytiliis nonuranus (Pilsbry and Olsson) 115 



Length 25 mm. Nonura Bay, Sechura, Peru. PHl 25601. 



11. Scolimytilus (Aeidimytilus) multiformis (Carpenter) 122 



Copy of Carpenter's manuscript sketch. Tablet 55, 1 large valve, flat 

 and broad (this is probably the specimen which measured long. 45., 

 lat. 24., alt. 32). This specimen is selected as the lectotype. 



12. Nncinella subdolas (Strong and Hertlein) 72 



Copied after Strong and Hertlein, 1937. Height 2.5 mm. Off Mazatlan. 

 Mexico in 12 fathoms. 



