498 axel a. olsson 



Explanation of Plate 25 



Figure Page 



1-lb. Eucrassatella (Hjbolophus) gibbosa (Sowerby) 179 



Fig. 1, length 30.4 mm. San Carlos, Panama. PRI 25627; Fig. la, 

 length 58.2 mm. Santa Elena, Ecuador. PRI 25628; Fig. lb, 

 length 48.8 mm. Punta Blanca, Ecuador. PRI 25629. 



2. Eucrassatella (Hjbolophus) diqaeti (Lamy) 180 



Length 71.6 mm. Gulf of California, sta. 3001, 38 fathoms. USNM 

 184205. 



3-3c. Crassinella adamsi, new species 183 



Fig. 3a, length 3.5 mm. Holotype; Fig. 3, length 2.7 mm. Para- 

 type; Fig. 3b, length 2.7 mm. Paratype; Fig. 3c, length 2.2 mm. 

 Paratype. Puerto Callo, Ecuador. ANSP 218933. 



4. Crassinella mexicana Pilsbry and Lowe 182 



Copied after Pilsbry and Lowe, 1932. Length 3.4 mm. Guaymas, 

 Mexico. Holotype, ANSP' 155622. 



5-5e. Crassinella pacifiea (C. B. Adams) 181 



Fig. 5, length 3.7 mm.; Fig. 5a, length 3.3 mm.; Fig. 5b, length 3.5 

 mm., Esmeraldas, Ecuador. PRI 25630; Fig. 5c. length 6.2 mm., 

 Panama City, Panama. PRI 25631; Fig. 5d, length 6.1 mm., enlarge- 

 ment, inside and out. Zorritos, Peru. PRI 25632. 



6-6e. Crassinella ecaadoriana, new species 182 



Types. Fig. 6, length 3.2 mm.; Fig. 6a, length 3.2 mm., Fig. 6b, 

 length 2.9 mm.; Fig. 6c, length 3 mm.; Fig. 6d, length 2.9 mm.; 

 Fig. 6e, length 3.2 mm. Puerto Callo, Ecuador. ANSP 218934. 



7-7b. Crassinella varians Carpenter 183 



Fig. 7, length 2.2 mm.; Fig. 7a, length 2.2 mm.; Fig. 7b, length 

 1.9 mm. Punta Blanca, Eucador. PRI 25633. 



8. Cardita (Pleuromeris) guanica, new species 188 



Length 3.2 mm. Guanico, Panama. Holotype, ANSP' 218925. 



