412 AXEL A. OLSSON 



Shell broadly elongate-ovate, the right valve slightly flexed, the beaks 

 placed a little behind the middle, subsolid. Color white or gray with the 

 umbones tinted with yellow or ochraceous salmon extending into the in- 

 terior. Surface smooth or irregularly handed with the lines of growth; there 

 is usually some fine, radial striation showing under a lens. Pallial sinus deep, 

 highest under the beak and then descending to form a bluntly rounded end 

 and confluent with the pallial line below for about half its length. 



Length 48.5 mm., height 34 mm., diameter 15.8 mm. 



Range — Lower California to Ecuador. Panama: Bucaro. Panama Canal 

 Zone: Palo Seco; Venado Beach. Ecuador: Punta Blanca. 



Fsammotreta dombei (Hanley) Plate 74, figure 2; 



Plate 85, figures 1-lb 



Tellina dombei Hanley, 1844, Proc. Zool. Soc. London, p. 144 Panama. — Hanley, 1846, 



Thes. Conch., vol. 1, p. 323, pi. 62, fig. 182 Panama. 

 Tellina dombeyi Hanley, 1844, Proc. Zool. Soc. London, index p. 195. — Sowerby, 1867, 



Conch. Icon., vol. 17, Tellina, pi. 30, fig. 169. 

 Apolymetis dombei (Hanley), Maxwell Smith, 1944, Panamic Marine Shells, p. 65, figs. 



850, 850A.— Hertlein and Strong, 1949, Zoologica, vol. 34, pt. 2, No. 9, p. 94. 

 Tellina excavata Sowerby, 1867, Conch. Icon., vol. 17, Tellina, pi. 26, fig. 138. Hab. - - ? 



The shell is ovate-oblong, the posterior side shorter, its dorsal margin 

 descending into a rounded and slightly flexed end; generally with a small 

 open gap along the anterior margin. The valves are nearly alike in shape 

 and inflation, the left valve is a trifle smaller only. Both valves are convex 

 along the anterior-umbonal slope, impressed behind. Surface smooth except 

 for the lines of growth which are irregularly distributed and sometimes set 

 off in bands by the deeper resting marks. The periostracum is thin, straw- 

 colored, and flakes off easily. Color of surface white, sometimes with the 

 umbones flushed faintly with red. The pallial sinus is large, highest in the 

 middle, united below with the pallial line. The ligament scar immersed. 



Length 60.6 mm., height 46.1 mm., diameter 24.3 mm. 



Length 77,6 mm., height 58 mm., semidiameter 14.8 mm., a right valve. 



As suspected by several workers, Sowerby's Tellina excavata described 

 from an unknown locality, has proved on examination of the type at the 

 British Museum (Natural History) to be the same species as Hanley's 

 P. dombei. P. dombei is a common shell in northern Peru, generally found 

 on mud flats. 



Range — Gulf of Fonseca to northern Peru. Panama: Panama City; 

 Puerto Chame; Chorrera; El Lagartillo near Las Tablas; Garachine; Rio 

 Chepo. Peru: Puerto Pizarro near Tumbez. 



rsammotreta gand!s (Hanley) Pl?te 67, figure 4; 



Plate 68, figure 7 



Tellina grandis Hanley, 1844, Proc. Zool. Soc. London, p. 141 Tumbez. — Hanley, 1846, 

 Thes. Conch., vol. 1, Tellina, p. 327, No. 206, pi. 65, fig. 247.— Sowerby, 1867, 

 Conch. Icon., vol. 17, Tellina, pi. 40, fig. 231. 



Shell large (length up to about 85 mm.), broadly elliptical, solid, de- 

 pressed to slightly convex, subequivalve. A posterior flexure is almost 

 lacking. Valves with the beaks placed a little behind the middle, the an- 

 terior side being somewhat longer, the two ends of the shell having much 

 th2 same rounded outline. Surface smooth or marked with fine growth lines, 



