324 PROCEEDINGS OF THE ACADEMY OF [Nov., 



Two other species of Cardtum are not uncommon, the large Ca?- 

 dtum orhita B. and S., Hilo, Hawaii (Thaanum); Moomomi, Molo 

 kai, Haena, Kauai (Bryan), and C. arcuatulum Sowerby, a very 

 small, angular Fragum, from Hilo, Hawaii (Thaanum); Honolulu 

 (Bryan), and Haleiwa (Pilsbry), Oahu. 



Solecardia bryani n. sp. Fig. 5. 



The shell is thin, oval, somewhat inequilateral, moderately plump, 

 white. Upper and lower margins subequally curved; anterior end 

 narrower than the posterior, both being rounded. Except the 

 beaks, the surface is minutely densely punctate, more coarsely so 

 near the ends; the points arranged in radial lines on the dorsal 

 posterior slope, elsewhere irregularly or in indistinct zigzags. Right 

 valve having a slender, erect, cardinal and a low, elongate posterior 

 tooth. 



Fig. .5. — Solpcardia bryani, n. sp., interior and dorsal view of ri^ht valve. 



Length 10.8, altitude, 7.8, diameter 5.2 mm. 

 Oahu: Paymalu, W. A. and E. L. Bryan. 



Solecardia hawaiensis n. sp. Fig. 6, a, b, c. 



The shell is thin, white, oblong, moderately plump, inequilateral. 

 Dorsal margin arched, a little more curved than the basal; anterior 

 end vertically subtruncate, anterior end rounded. Beaks \ery 

 small with more convex, orbicular embryonic caps. Surface glossy, 

 with fine growth lines only. Interior dull, the muscle impressions 

 and pallia] line rather indistinct. Right valve with a strong, erect 

 anterior tooth and an elongate, lower posterior. Left valve has 

 strong median, weak anterior and elongate posterior tooth. 



Length 7, altitude 4.8, diameter 3.4 mm. 



Hawaii: Hilo, Thaanum, type loc. Kahoolawe, on the north 

 shore (Pilsbry). Molokai: Kainalu and Moomomi (Bryan). Oahu: 

 Honolulu Harbor and Paumalu (Bryan), near Kahuku and Haleiwa 



