18« AXEL A. OLSSON 



Cardlta (Cardita) coTleri Broderip Plate 26, figures 2-2b 



Venericardia crassicostata Sowerby, 1825, Cat. Shells Tankerville, Appendix, p. IV. (Not 



V. crassicGsta Lamarck, 1819.) 

 Cardita crassicosta Hanley, Cat. Recent Bivalve Shells, p. 129, Sup. pi. 17, fig. 56. 

 Cardita cuvieri Broderip, 1832, Proc. Zool. Soc. London, p. 55.— Reeve, 1843, Conch. 



Icon., vol. 1, Cardita, pi. 5, fig. 24. 

 Cardita crassicostata (Sowerby), Maxwell Smith, 1944, Panamic Marine Shells, p. 55, 



fig. 692 G. (in text as 629C).— Durham, 1950, Mem. Geol. Soc. America, No. 



43, p. 71, pi. 16, figs. 1, 3, 4 (fossil). 

 Cardita cuvieri Broderip, Hertlein and Strong, 1946, Zoologica, vol. 31, pt. 3, No. 8, 



p. 105. 



Shell large (length to nearly 70 mm.), subquadrate, longer than high, 

 solid and heavy, with large, full umbones at the anterior third, ending in 

 prosogyrate beaks coiled strongly over a deeply sunken lunular area. Pos- 

 terior-dorsal area deeply excavated on the outer side next to the umbonal 

 angle, vaulted and ribbed on the hinge side. Sculpture coarsely ribbed, 

 formed by large, strong, broad, square, flatly nodulous ribs (13 to 14) 

 separated by narrower, deeply channelled interspaces. Color is a mottled 

 orange-brown and white, sometimes reddish, the lunular area brown, in 

 life with a dirty brown periostracum. Interior white to pinkish, the posterior 

 margin truncate and excavated, the ventral margin fluted by the ends of 

 the ribs. Hinge coarse and heavy. 



This fine species together with C. megastrophia is fairly plentiful along 

 certain parts of the Ecuadorian coast. In 1832, Broderip wrote the following: 

 "This fine species, far exceeding in size and beauty any Cardita hitherto dis- 

 covered, was dredged from sandy mud in eleven fathoms water, about seven 

 miles from the shore. After its capture the dredge was kept at work for 

 some hours, but no other specimen could be procured. — The shell is a very 

 striking object and has almost the appearance of a carved work." [p. 56.] 



Range — Lower California to northern Peru. Panama: Pearl Islands; 

 Burica Peninsula. Colombia: Gorgona Island (Hertlein and Strong). 

 Ecuador: Esmeraldas; Manta; Jaramijo; Isla la Plata; San Pedro near 

 Manglaralto; Punta Mambri on the south side of Santa Elena peninsula. 

 Peru: Zorritos. 



Cardita (Cardita) spurca beebei Hertlein Plate 39, figure 6 



Cardita spurca Sowerby, Hertlein and Strong, 1946, Zoologica, vol. 31, pt. 3, No. 8, p. 



106. (Not C. spurca Sowerby, 1832, Iquiqui, in Peru). 

 Cardita spurca beebei Hertlein, 1957, Bull. So. California Acad. Sciences, vol. 56, pt. 



3, pp. 107, 108, pi. 21, figs. 3, 4, 12, 13, 14. Type, off Manzanillo, Colima, 



Mexico, in 35 fras. 



Shell ovately oblong, moderately thick, sculptured with about 18 tri- 

 gonal, finely nodulose, radial ribs, those on the anterior and posterior 

 margins finer than the others. Shell differing from that of Cardita spurca 

 Sowerby in that it is smaller, thinner, and has finer ribs. Dimensions: 

 length, 18.2 mm., height, 15.5 mm., convexity, both valves together, 11 mm. 

 (Hertlein, 1957.) 



A single specimen with both valves from Panama Bay (perhaps a 

 shrimper shell) was contributed by Mr. Stewart Jadis of Balboa, Canal 

 Zone. This is a larger shell than described by Hertlein having the following 



