412 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



end; posterior end rounded almost exactly like the anterior, base 

 gently arcuate; surface polished, minutely concentrically rippled; 

 prodissoconch visible; hinge weak, the resilifer large, obliquely in- 

 cUned backward. Length, 6; height, 5.5; diameter, 2.5 mm. 

 Cat. No. 210876, U.S.N.M. 



Station 2900, off Santa Rosa Island, CaUfornia, in 13 fathoms. 

 Named in honor of Mr. W. H. Golisch, of the Los Angeles Concholog- 

 ical Club. 



PSEUDOPYTHINA MYACIFORMIS, new species. 



Shell small, myaciform, plump, nearly equilateral, the posterior 

 end slightly shorter, wider, and rounded; anterior end more atten- 

 uated; surface finely concentrically threaded, but obscured by an 

 habitual coating of a blackish color, probably manganese dioxide; 

 the shell underneath it is yellowish white; hinge weak, the ligament 

 carrying a long, very narrow, lithodesma. Length, 8.5; height, 5.5; 

 diameter, 3 mm. Cat. No. 133235, U.S.N.M. 



Port Orchard, Puget Sound. The young shells are proportionately 

 shorter. 



TRIGONIOCARDIA EUDOXIA, new species. 



Shell small, mottled with lighter and darker rose-color, suborbicular, 

 inflated, strongly sculptured; radial sculpture of 15 sharp angular 

 ribs with subequal interspaces, the keel of the ribs sparsely, regularly, 

 minutely pustular; on the posterior dorsal area are six additional 

 smaller more closely pustular riblets ; the interspaces in all are finely 

 concentrically rugose; the hinge is strong; the interior margins 

 deeply sulcate in harmony with the radial sculpture; the central part 

 of the interior is whitish. Length, 9; height, 9; diameter, 8 mm. 

 Cat. No. 208590, U.S.N.M. 



Station 3020, Gulf of Cahfornia, in 7 fathoms. 



PROTOCARDIA PAZUNA, new species. 



Shell small and delicate, resembling P. j>anamensis Dall, but smaller, 

 more delicate, more elongated, and with the spinose posterior sculp- 

 ture much more prominent when preserved intact; sculpture of about 

 40 anterior minutely nodulous ribs, each giving the effect of a strmg 

 of beads, and to the interspaces of punctation; there are about 22 

 ribs on the j)osterior area, which, when intact, carry close-set spinules; 

 the inner margins are sharply serrate ; the hinge margin near the um- 

 bones has a tinge of crimson, otherwise the shell is yellowish white. 

 Length, 10; height, 8.6; diameter, 6 mm. Cat. No. 211618, U.S.N.M. 



Station 2828, off La Paz, Gulf of California, in 10 fathoms. 



CARDIUM DULCINEA, new species. 



Shell obliquely ovate, strongly radially sculptured with about 22 

 rounded ribs with narrower not channeled interspaces; the more 



