47+ AXEL A. OLSSON 



Explanation of Plate 1 



Figure Page 



1-lb. IVacnla (Nucula) payteiisis A. Adams 56 



Fig. 1, natural size; Figs, la, lb, stained, length 5.9 mm. Bayovar, 

 Peru. P'RI 25500. 



2-2b. IVuciila (IVueula) exigna Sowerby 56 



Figs. 2, 2a; same valve, outside and in; Fig. 2b, dorsal view to show 

 details of sculpture. Length 5.7 mm. Manta, Ecuador. PRI 25501. 



3-3a. Nucnla (Ennucula) colombiana Dall 57 



Length 4.6 mm., paratypes, USNM 619714. 



4-4a. Nucnla (Jfuciila) declivis Hinds 55 



Length 4.7 mm. Manta, Ecuador. PRI 25502. 



5. Solemya (Acharax) johnsoni Dall 52 



Figure copied after Dall, 1895. Length 115 mm. Off coast of Lower 

 California. 



6. Jfucula (Nuonla) schencki Hertlein and Strong 56 



Figure copied after Hertlein and Strong, 1940. Length 2 mm. Fort 

 Guatulco, Mexico. 



7-7b. Nuculaiia (Saccella) callimene (Dall) 64 



Fig. 7, dorsal view; Figs. 7a, 7b, inside and outside views. Length 

 15.5 mm. Gulf of Panama. USNM. 



8. Limopsis zonalis Dall 110 



Height 13.2 mm. Gulf of Panama. USNM. 122879. 



9. Xucnlana (Saccella) elenensis (Sowerby) 63 



Length 12.4 mm. Santa Elena, Ecuador. PRI 25503. 



10-lOa. Nucula (Ifiicula) exigna Sowerby 56 



A small form, length 2.8 mm. Bucaro, Panama. P'RI 25504. 



