466 Zoological Society. 



tral valve ovate, with a broad mesial groove forming a sinus in front ; 

 internal appendage as in T. australis. 



From Japan. In Mr. Norris's and Mr. Cuming's collections. 



Terebratula labradorensis. Ter. testd suborbiculari, postice 

 acuminatd, obtusd, crassiusculd, albidd; valvis valde incequalibus, 

 radiatim obsolete costatis ; lined marginali subflexuosd ; valvd 

 dorsali antice rotundatd, postice acuminatd, obtusd; foramine 

 magno, integro ; ared cardinali magna, subplanulatd ; deltidiis 

 majusculis, coalescentibus ; carind dorsali inconspicud ; valvd ven- 

 trali suborbiculari, postice subacuminatd ; margine valvarum cre- 

 nulato. 

 Shell suborbicular, acuminated behind, obtuse, thickish, whitish ; 

 valves very unequal, obsoletely radiately ribbed ; marginal line some- 

 what flexuous ; dorsal valve rounded in front, acuminated and obtuse 

 behind ; perforation large, entire ; cardinal area large, somewhat 

 flattened ; deltidia rather large, united ; mesial ridge indistinct ; ven- 

 tral valve nearly orbicular, slightly acuminated behind ; margin of 

 the valves crenulated. 



In the British Museum. From Labrador ; C. Goodsir. 



Terebratula algoensis. Ter. testd suborbiculari, postice subacu- 

 minatd, antice sublobatd, albidd ; valvis radiatim striatis ; carind 

 dorsali conspicud, rotundatd ; foramine magno, incompleto ; mar- 

 gine valvoe dorsali minutissime crenulalo. 

 Shell suborbicular, slightly acuminated behind, rather lobed in 

 front, whitish ; valves radiately striated ; mesial ridge distinct, round- 

 ish ; perforation large, incomplete ; margin of the dorsal valve very 

 minutely crenulated. 



A single valve of this specimen is in the British Museum, labelled 

 " Algoa Bay, Bowerbank." 



" Descriptions of new species of Marginella." By G. B. Sowerby, 

 F.L.S. 



Marginella fusca. Marg. testd elongatd, subovali, postice suban- 

 gulatd, antice late marginatd, in medio paululum contractd, fused, vel 

 pallide purpured, fusco-trifasciatd; spird breviusculd, apice ob- 

 tuso ; aperturd angustd, columelld rectiusculd, plicis quatuor, qua- 

 rum ducc anticce alba, prominentibus, spiraliter elongatis ; labio 

 externo albo, intus in medio incurvo, extus fusco, late refiexo. 



Differing from M. nitida in the colouring and the shortness of the 

 spire, and in the outer lip being more broadly reflected. 



In Mr. Cuming's collection. From the West Indies. 



Marginella crassilabrum. Marg. testd subovali, in medio suban- 

 gulatd, pallide griseo-fulvd ; spird brevi ; anfractibus distinctis, 

 ultimo dilatato, ad spiram elevato ; columelld plicis quatuor, qua- 

 rum dum anticce prominentes, spiraliter elongatis ; labio externo, 

 crasso, late incurvo, angulato, extus varicoso, ad apicem tumide 

 elevato. 



This species is remarkable for the broad angular disc formed by 



