524 axel a. olsson 



Explanation* of Plate 51 



Figure P'age 



1-la. Chlonopsis amathnsia (Philippi) 299 



Length 55.1 mm. Panama Bay, Mr. Harry Johnson. PRI 25696. 



2-2a. Chlonopsis montezuma (Pilsbry and Lowe) 302 



Length 38 mm. Palo Seco, Panama Canal Zone. PRI 25758. 



3-3a. Chlonopsis ornatissima (Broderip) 300 



Length 53.5 mm. Panama Bay. Mr. Harry Johnson. PRI 25759. 



4-4a. Chione (Llrophora) kellettii Hinds 296 



Length 64 mm. Panama Bay. Mr. Harry Johnson. PRI 25694. 



5-5a. Chione (IllocUone) snbmgosa (Sowerby) 298 



Length 45.8 mm. Tumaco, Colombia. PRI 25760. 



6-6a. Chione (Chione) compta (Broderip) 294 



Length 56.4 mm. Bayovar, Sechura, Peru. PRI 25761. 



