OF MOLLUSKS FROM WESTERN NORTH AMERICA. 280 



NARICA INSCULPTA. 



N. t. " N. apertse" simili, sed magis compacta ; paullum angus- 

 ' tiore, umbilico tamen major <? ; lineis spiralibus circ. xxvi. dis- 

 tantibus insculptis cincta, quorum x.in anfr. penult, monstran- 

 tur ; postice lineis incrementi vix conspicuis. 

 Long. -3, long. spir. '08, lat. '28; div. 100. 

 Bab. Acapulco, on Ostrea iridescens, Rowell. 

 The Cape St. Lucas species (vide Ann. Nat, Hist. 1864, xiii. p. 476) 

 has the sculpture in irregularly raised limlae, while this has minute 

 grooves chiselled out of a smooth surface. It appears that the San 

 Franciscans import the huge tropical oysters in large quantities, 

 their own species having the coppery flavour which Americans dis- 

 like in the British species. From the outside of the valves, Mr. 

 Rowell obtained this and many other interesting species. 



DlilLLIA EBURNEA. 



P. t. turrita, carneo-albida, tenuiore, Itevi, maxime nitente; mar- 

 ginibus spirce rectis ; anfr. nucl.1 . . . [decollatis] ; norm, 

 circ. ix., postice planatis, supra suturas appressis, medio satis 

 excurvatis ; hie et illic ruffi.s radiantibus, obsoletis., irregula- 

 rihus ex sculpt a ; basi prolongata, canali conspicuo, aper'ij 

 sinu postico minore, in eulco Jato, hand definito, spiram rw?n- 

 denle sito ; labro acuto ; labio indistincto ; columella pl&nata. 



Long. 1*3, long. spir. -8, lat. '45; div. 30. 



Hab. Near Gulf of California (teste Rowell). 



Easily recognized by its smooth glossy aspect and French-white 

 colour ; the notch lying along a broad spiral channel, which throws 

 the junction of the whorl as it were up the suture. 



MANGELIA ALBOLAQUEATA. 



M. t. solida, turrita, alba, rudi, marainibus spirce rectis ; anfr. 

 nucl.? . . . [decollatis] ; norm. circ. ix. subrotundatis, costis 

 circ. xi.-xv., declivibus, satis angustis, postice obsoletis, lineis 

 subreaularibus spiram ascendentibus ; lirulis spiralibus anticis 

 crebris, postice obsoletis ; basi elongata ; labrol . . . ; labio 

 talloso ; sinu postico majore, suturam attinaente. 

 Long. "88, long. spir. '55, lat. '34; div. 30. 

 Hab. Panama (teste Rowell). 



Described from an imperfect and worn specimen, but easily recog- 

 nized by its ivory-white colour, and ribs in slanting rows, as though 

 the creature were roofed with white tiles. It was erroneously quoted 

 in the Brit. Assoc. Rep. 1863, p. 669, as a Drillia. 



ElJLIMA FALCATA. 



E. t. valde tereti, valde curvata t alba, politissima, solidiore, 

 marainibus spirce meniscoideis ; anfr. nucl.1 . . . [detritis'] ; 

 norm. circ. x., planatis, lente augentibus ; axi hamata, suturis 

 indistinctis ; basi elongata, hand tereti ; apertura pyriform\ t 

 anlice latwre; labro acuto, labio tenui, appresso. 

 18 273 



