546 AXEL A. OLSSON 



EXPLANATION" OF PLATE 73 

 Figure Page 



1-lc. Strigilla (Strigilla) disjuncta Carpenter 387 



Fig. 1, enlargement of hinge, Isla del Gallo, Colombia. PRI 

 25887; Fig. la, length 38.5 mm., Sua, Ecuador. PRI 25888; Fig. 

 lb, enlargement of a section of the posterior-dorsal area; Fig. 

 Ic, interior showing pallial sinus, length 39.4 mm. Bahia Honda 

 near El Lagartillo, Panama. PRI 25889. 



2. Strigilla (Strigilla) dichotoma (Philippi) 389 



Length 7 mm. Punta Blanca, Ecuador. PRI 25890. 



3. Strigilla (Strigilla) clcerula (Philippi) 388 



Length 9.4 mm. Biicaro, Panama. PRI 25891. 



4-4a. Strigilla (Strigilla) carnaria Linne 387 



Fig. 4, length 21.6 mm.; Fig. 4a, enlargement of posterior-dorsal 

 area. Santa Elena, Ecuador. PRI 25892. 



5. Strigilla (Strigilla) chroma Salisbury ...388 



Details of sculpture on the posterior-dorsal area. Pearl Islands, 

 Panama. PRI 25893. 



6-6a. Strigilla (Strigilla) errilia (Philippi) 389 



Fig. 6, length 11.2 mm.; Fig. 6a, enlargement of a section of middle 

 surface to show the fine cross-striation between the smooth- 

 topped sulci. Santa Elena, Ecuador. PRI 25894. 



