REPORT ON TITE LAMELLTBRANCHIATA. 257 



crenulated, and that the iDaigiii of the \alves is smooth and Hattoned witliin. The 

 shell is a little inequivalve, the anterior end or that towards which the beaks incline 

 being shorter than tlie posterior. The hinge-teeth are few in niunber, about three or 

 four on each side the central triangular deepish ligamental pit. 



Limopsis anrito (Brocchi). 



Area anrita, Brocelii, Conch. Foss. suL-app., vol. ii. p. 485, pi. xi. %. 9. 



Pedunculus auritus, Philippi, Eiiuin. Moll. Sicil., vol. i. p. 63, vol. ii. p. 45. 



Limopsis anrita, Jeffreys, Brit. Conch., vol. ii. j). 161, pi. iv. fig. 3, vol. v. p. 174, pi. xxx. fig. 1. 



Limopsis aurita, Jeffreys, Proc. Zool. See. Loiul, 1879, p. 585. 



Habitat. — Station 73, west of the Azores, in 1000 fathoms; Station 56, otf 

 Bermudas, in 1075 fathoms; Station 23, off Sombrero Island, West Indies, in 450 

 fathoms. 



Limcypsis cumingii, A. Adams, associated by Jeffreys with this species, besides 

 being very different in form, has the teeth in a greater curve, and a peculiar lunular 

 excavation on the longer dorsal slope just in front of the anterior teeth. Limopsis 

 minuta and the present species appear to be very much alike, the former l)eing smaller, 

 with the inner margin of the valves crenulated, but whether this lie a good specific 

 character in this genus appears to me at present rather doubtful. 



Limopsis lata, n. sp. (PI. X^'III. hgs. 7 -7 a). 



Testa paulo oblicjua, late subovata, griseo-albida, epidermide fibrosa, prajcipue prope 

 marginem amicta, liris concentricis et radiantibus tenuibus cancellata. Margo dorsi 

 mediocriter elongatus, rectus. Latus anticum oblique curvatum, posticum minus 

 arcuatum," vix truncatum. Area ligamenti fuscesceus, anguste elliptica, concava, in 

 medio ligamento parvo augulato saturate brunneo instructa. Denies cardinis circiter 

 8—9 validi. Pagina interna rugosa, subpunctata, mai'ginc creuulato, subdentato, 

 incrassato. 



This, judging from the series of specimens at liand, is a small species. It is 

 moderately thick and ventricose, somewhat oblique, of a dirty whitish coloui", and more 

 or less covered with an epidennis wliicli towards and upon tlie outer margin is rather 

 coarsely fibrous. The sculpture consists of fine radiating and concentric lii'ic, producing 

 a cancellated surface. The hinge-margin of course is straight and rather long. The 

 anterior side is Ijroadly curved and very o])lique below the middle, the posterior ])eing 

 less regularly arcuate and in some examples somewhat truncated. The um})ones are 



(zool. chall. EXP. — PART XXXV. — 1885.) Mm 33 



