NO. 1210. SYNOPSIS OF NORTH AMERICAN TELLINIDyE—DALL. 315 



Type.—J^o. 94012, U.S.N.M.; dredged by the U. S. Fi,sh Commis- 

 sion between the delta of the Mississippi and Cedar Keys, Florida, in 

 32 fathoms, sand, at station 2387. 



Quite distinct from any species of our coasts so far known, but 

 closely resembling' the young of a larger yalye hereafter described 

 from Panama Bay. 



MACOMA (CYDIPPINA) LIMULA Dall. 



(Plate II, fig. 1.) 



Macoma I'mmla D.\ll, Bull. U. S. Nat. Mu8. No. 37, p. 60, 1889 (name only); Nau- 

 tilus, IX, July, 1895, p. 32. 



This species, which has not ])een ligured, is now illustrated. It can 

 always be recognized by its curiously sagrinate surface. 



MACOMA (PSAMMACOMA) TAGELIFORMIS new species. 



Shell thin, white, elongate, longer and rounded in front, shorter and 

 rounded-truncate behind, moderately conyex; surface sculptured onl}^ 

 with rather rude incremental lines and faint radial striations; yalyes 

 unequal, the left yalye more conyex, ])ut the rosti'um is not percepti- 

 bly tiexed; teeth small, hinge normal, pallial sinus gibbous, about half 

 confluent below, not quite similar in both yalyes, extending in front of 

 the middle of the shell. Lon. 15, alt. 26, diam. 11 mm. 



Ty2>e. — No. 0080, U.S.N.M., from Corpus Christi Bay, Texas. This 

 species and Macoma hrevifrons will be fully illustrated in a Report on 

 the Mollusca of Porto Rico, now in preparation. 



PACIFIC COAST. 



TELLINA (MERISCA) RECLUSA new species. 



(Plate III, fig. 2.) 



Shell white, solid, moderately conyex, subtrigonal, strongly flexuous; 

 anterior end slightly longer, rounded; posterior end keeled dorsalh', 

 wedge-shaped, twisted to the right with a yery short terminal trunca- 

 tion; beaks small, pointed; surface sculptured, with rather close-set, 

 little eleyated, concentric sharp lamella?, with wider, faintly radialh' 

 striate interspaces; escutcheon deep, narrow, long, bordered by a 

 minutely serrate keel on each yalye, lunule small, inconspicuous; 

 hinge strong; pallial sinus high behind, descending to the base of the 

 adductor scar in front, wholly confluent below. Lon. 18, alt. 13, 

 diam. 6 mm. 



Tyjyes. — No. 105513, U.S.N. M., from San Ignacio Lagoon, Lower 

 California, Hemphill. Also oft' Lower California, in lat. 30"^ 28', by 

 the U. S. Fish Commission, at station 3019, in 11 fathoms. Gulf of 

 California. 



This species is nota))le for the rasp-like (quality of its surface to the 

 touch. 



