320 PROCEEDINGS OF THE NATIONAL MVSEVM. vol.xxiii. 



TypeH. — No. 108557, U.S.N.M,, dredged in 30 fathoms in Panama 

 Bay by the U. S. Fish Commission, at station 2790. 



A simple little species, but one which can hardly be united with any 

 other known from the vicinity. Fresh specimens exhibit on the 

 surface a lovely iridescent glow. 



TELLINA (ANGULUS) RECURVA new species. 

 (Plate III, fig. 4.) 



Shell translucent white, brillianth' polished, rather compressed, 

 with very low beaks, the anterior side longer, produced and evenly 

 rounded, the posterior side with the site of the ligament excavated, 

 the posterior end rounded and slightly recurved; surface with faint, 

 concentric, chiefly incremental sculpture, anterior end with a marked 

 gape; hinge feeble, lateral tooth very small; pallial sinus short, sub- 

 triangular, confluent below. Lon. 12, alt. 7.5, diam. 2.75 mm. 



Types. — No. 108559, U. S. N. M., dredged near the head of the Gulf 

 of California in 2-1 fathoms mud, ofl' Point San Fermin, by the U. S. 

 Fish Commission, at station 3034. 



The peculiar form of this shell distinguishes it from any other on 

 the coast. It is most like a 3'oung Macoma yoldlfo7")nis^ but more 

 blunt behind, and with a difl'erent hinge. The delicate anterior right 

 lateral is frequently broken ofl' in separated valves. 



TELLINA (ANGULUS) CARPENTERI, new name. 



Angulus mriegatus Carpextee, Ann. Mag. Xat. Hist., 3d Ser., XIY, Dec. 1864, p. 5; not 

 TelUna variegata Gmelin, Syst. Naturte, 1792, p. 3237. 



Gmelin's species is also an Angulus^ and therefore the Californian 

 form requires a new name. The elevated internal ray is absent or 

 obsolete. 



TELLINA (OUDARDIA) BUTTONI new name. 

 (PlatelV, figs. 12, 13.) 



Angulus modestus ? var. ohtusus Carpenter, Suj^pl. Report Brit. Assoc, for 1863, p. 639, 

 1864; Smithsonian Miscell. Coll. No. 252, 1872, p. 125; Proc. Acad. Nut. Sci. Phila., 

 1865, p. 56, not TelUna ohtusa J. Sowerby, Min. Conch., II. pi. 179, 1818, nor T. 

 ohtusa G. B. Sowerby, Conch. Iconica, 1868. 



Angulus modestus of the majority of Californian collectors. 



Shell elongated, subequilateral, compressed, polished, white, rounded 

 before, slighth' shorter and pointed behind, with a slight flexuosity; 

 surface flnely concentrically grooved, with wider interspaces, the 

 sculpture stronger on the right valve and anteriorly; beaks low, in- 

 conspicuous; interior polished, white, with a well-marked thickened 

 ray behind the anterior adductor scar; pallial sinus reaching the ray, 

 confluent below. Lon. 16, alt. 9.5, diam. 3.5 mm. 



Tyjjes. — No. ■12865a, U.S.N.M., from the island of Guadalupe, off 

 Lower California. 



