558 axel a. olsson 



Explanation of Plate 85 



Figure Page 



1-lb. Psammotreta dombei (Hanley) 412 



Holotype of Tellina excavata Sowerby. Length 43 mm., height 

 38 mm., diameter 20 mm. Hab — ? P^rom Taylor Coll. British 

 Museum (Nat. History). 



2-2c. Neocyreiia radiata (Hanley) 198 



Holotype. Length 39.5 mm., height 36 mm., diameter 28 mm. Central 

 America. H. Harvey Esq. (Hanley Coll.). British Museum (Nat. 

 History). 



3. Donax obesus d'Orbigny 344 



Holotype. Length 11.5 mm. Paita, Peru. D'Orbigny Coll. British 

 Museum (Nat. History). 



4. Donax paytensis d'Orbigny 344 



Interior of a specimen from the type lot, length 29 mm. Paita, 

 Peru. D'Orbigny Coll. British Museum (Nat. History). 



5. Saiiguinolaria (Sang-ulnolaria) vespertina Pilsbry and Lowe 348 



Length 34.2 mm. Guanico, Panama. PRI 25921. 



6. Sanguinolaria (Sangiiinolaria) tenuis, new species 349 



Length 32.9 mm. Canoa, Ecuador. Holotype, ANSP 218911. 



7-7a. Semele jovis (Reeve) 367 



Length 58 mm., height 49.4 mm., diameter 23.2 mm. Holotype, 

 British Museum (Nat. History). 



8. Semele fonnosa (Sowerby) 365 



Length 64.4 mm., height 52 mm., diameter 27 mm. Santa Elena, 

 Ecuador. Holotype, British Museum (Nat. History). 



9. Mactra (3Iicromactra) angusta Reeve 325 



Length 29.1 mm. Panama. Holotype, British Museum (Nat. History). 



10. Heterodonax blmaculata (Linne) 355 



Length 19.2 mm. Farfan Beach, Panama Canal Zone. P'RI 25922. 



