96 



latera rotundatd, deltidiis majusculis, coalescentibus ; valvd ven- 



truli ovatd, suko medicmu lutmsculo, emarginutionem unticam 



efformante ; ossiculo inierno ut in T. australi ; margine valvarum 



Itevissimo. 



Shell nearly oval, rather acuminated posteriorly, a little gibbous 



and slightly sinuated anteriorly ; valves uneąual, smooth ; marginai 



line nearly straight, a little sinuated in front ; dorsal valve rather 



acuminated posteriorly, reflected, without any mesial ridge, but with 



a very obsolete mesial furrow ; perforation small ; cardinal area 



narrow, rounded at the sides, with rather large united deltidia ; ven- 



tral valve o vate, 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 coUections. ' ''~'' 



Tehebratula Labradorbnsis. Ter. testd suborbiculari, postici 



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



radiatim obsolete costatis ; lined marginali subflexuosd ; valvd 



dorsali antick rotundatd, postice acuminatd, obtusd; f or amine 



magno, integro ; ared cardinali magnd, subplanulatd ; deltidiis 



majusculis, coalescentibus ; carind dorsali inconspicud ; valvd ven- 



trali suborbiculari, postice subacuminatd ; margine valvarum ere- 



nulato. 



Shell suborbicular, acuminated behind, obtuse, thickish, \vhitish ; 



valves very uneąual, obsoletely radiately ribbed ; marginai 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 valvcE dorsali minutissimi crenulato. 

 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,untice late marginatd, in medio paululitm contractd./uscd, vel 

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

 tuso ; aperiurd angustd, columelld rectiusculd, plicis ąuatuor, qua- 

 rum dute anticce albte, prominentibus, spiralitei' elongatis ; labio 

 externo albo, intus in medio incurvo.. extusfusco, late reflexo. 



