SOO Panama Sheik. solenid^. 



Of this species, hitherto unique in the Cumingian collection, 

 we obtained only 1 specimen of the convex -valve. Col. Jewett 

 also brought a convex valve to Dr, Gould, and retained another 

 odd valve from Mazatlan. 



608. Corbula — ■ . Sp. indet. a. 



This species has some resemblance to 0. Taheitensis. Wd 

 obtained at Panama but 1 valve, which is probably immature. 



609. Corbula . Sp. indet. b. 



Two left valves were obtained at Panama. 



Family— SOLENID^. 



610. Solecurtus affinis. Nov. sp. 



Shell much elongated, compressed cylindric, well rounded at 

 both extremities; ventral edge straight or slightly arcuated: 

 white beneath a deep yellowish brown epidermis : with unequal 

 striae of growth : beaks not prominent, a little behind the mid- 

 dle of the shell : umbones compressed along the middle : liga- 

 ment broad, with stout nymphasal callosities : teeth small, one 

 in the left, and two in the right valve. This is the analogue of 

 iS. Canboeus. 



Length 2.25 inches; height .8 inch; breadth .55 inch. 



/Station. — Unknown. 



Habitat. — Panama ; C. B. A. I 



10 specimens were collected. 



« 



611. Solen rtidis. Nov. sp. 

 Shell solid, straight or slightly recurved ; with the posterior 

 extremity abruptly truncated nearly perpendicularly; ante- 

 riorly with very thick rounded margins: white beneath a 

 brown deciduous epidermis, which is produced much beyond 

 the margins : with only indistinct striie of growth on the shell • 

 with some radiating lines on the epidermis : beaks inconspicu- 



