3gs AXEL A. OLSSON 



deep, highest at the posterior one-third and connected directly with the 

 anterior adductor scar. Color white or in varying shades of rose-pink. 



Strigilla carnaria is a common and widely distributed species through 

 the Caribbean region but its occurrence in the Pacific zone, in spite of Han- 

 ley's early records, has generally been denied. I have numerous specimens 

 of a Strigilla from the coasts of northern Peru and Ecuador which appear 

 identical with typical Caribbean examples of S. carnaria, or they differ 

 merely in size and minor details of sculpture. 



Range — Panama to northern Peru. Panama: Bucaro. Colombia: Isla 

 del Gallo. Ecuador: Galeras; Mompiche; Santa Elena; Camerones. Peru: 

 Zorritos. 



Strigilla (Strigilla) chroma (Salisbury) Plate 73, figure 5 



Tellina (Strigilla) fucata Gould, 1851, Proc. Boston Soc. Nat. Hist, vol. 4, p. 91.— 



Gould, 1853, Boston Jour. Nat. Hist., vol. 6, p. 399, pi. 16, fig. 4. (Not Tellina 



fucata Hinds, 1844). Mazatlan. 

 Strigilla costulifera Morch, Hertlein and Strong, 1949, Zoologica, vol. 34, pt. 2, No. 9, 



pp. 95, 96, pi. 1, fig. 15. — Hertlein and Strong. 1955, Bull. Araer. Mus. Nat. Hist, 



vol. 107, art 2, p. 201. Probably not of Morch, 1860. 

 Tellina chroma Salisbury, 1934, Proc. Malacol. Soc. London, vol. 21, pt 2, p. 84. New 



name for T. (Strigilla) fucata Gould. 



Like S. carnaria but usually smaller and less inequivalve (the left valve 

 is a little larger). The posterior-dorsal surface has a small escutcheon-like 

 area bounded by a rounded ridge and sculptured with irregular and some- 

 what zigzagged lines. The commonest and most widely distributed Strigilla 

 in the Panamic area. , ^ 



Range — Lower California to northern Peru. Mexico: Acapulco. Pan- 

 ama: Bucaro. Ecuador: Puerto Callo; San Francisco; Punta Montanita 

 near Manglaralto. Peru: Punta Picos. 



Strigilla (Strigilla) cicerula (Philippi) Plate 73, figure 3 



Tellina cicerula Piiilippi, 1846, Zeit f. Malakozool., Jahrg. 3, p. 19, No. 2 Mazatlan. 

 Strigilla costulifera Morch, 1860, Malak. Blatter, bl. 7, p. 189, No. 270 Sonsonate. 

 Strigilla interrupta Morch, 1860, op. cit., p. 190, No. 271 Sonsonate. 

 Strigilla cicerula (Philippi), Hertlein and Strong, 1949, Zoologica, vol. 34, pt 2, No. 

 9, p. 95, pi. 1, fig. 19. 



Shell small, usually less than 10 mm. in length, ovate to subcircular, 

 the beaks placed slightly anterior of the middle, moderately convex. Sur- 

 face generally highly polished, white, with pink-colored umbones, which 

 color is usually transmitted through the texture of the shell into the iriterior. 

 Sculpture as usual for the genus consisting of oblique, divaricating incised 

 lines which appear to intersect the ventral margin in the middle zone almost 

 at right angles, the lines on the anterior slope more widely spaced and 

 often interrupted by a smooth tract. 



Length 9.6 mm., height 8.7 mm., diameter of a right valve 2.6 mm. 



Generally rare. In size and shape, this species bears some resemblance 

 to S. pisiformis of the Caribbean, but is larger, less convex and with non- 

 zigzagged sculpture on the posterior-dorsal area. 



Range — Gulf of California to Ecuador. Panama: Bucaro. Colombia: 

 Isla del Gallo. 



