276 MR. E. A. SMITH ON THE ['^P'"- ^> 



paulo reflexo, rimam umiiliealem angustam semiobtegente ; 



plica columellce Jiaud perspicua. 

 Longit. 2\ viillim., diam. fere 1. 



The fold or twist of the columella in this minute species is high 

 up and not conspicuously developed. 



TuRBONiLLA AssiMiLANS. (Plate XXIII. fig. 19.) 



Testa elongata, gracilis, alba, nitida, suhpelhicida ; anfractus 

 9—10, convexi, lente accrescentes, costis tenuibus, gracilibns, 

 {in anfr. penult, circiter 20) leviter obliquis, instructi, lirisque 

 spiralibus paucis circa partem infer iorem inter castas ornati ; 

 apex magnus, globosus ; anfr. ultimus costis basim versus 

 obsoletis ; apertura parva, suhovata, ; columella leviter torta. 

 Longit. 4 5 miilim., lat. 1. 



Tiirbonilla acicularis, A. Adams, from the Philippine Islands, 

 and T. pusilla, C. B. Adams, from Jamaica, have very much the 

 same form as the present species. The latter, however, is rather 

 more slender, and has fewer riblets than T. assimilans, whilst the 

 former has flatter whorls and coarser costse. 



TXJRBONILLA TRUNCATELLOIDES. (Plate XXIII. fig. 20.) 



Testa elongata, solidiuscula, alba, tinea flavescente circa medium 

 anfractuum ornata ; anfract. 7, primus (apex) pellucidus, 

 globosus, cceteri levissime convexi, suiura profunda seju/icti, 

 costis longitudinalibus 15-16 crassis, interstitiis latioribus, 

 instructi ; anfr. ultimus linea secunda flavescenti infra medium 

 cinctus ; apertura subpyriformis ; columella superne plicata ; 

 peristoma continuum, margine columellari leviter refiexo. 



Longit. 4 miilim., diam. Ig. 



This species agrees in its general appearance with the section 

 Mormula, but has a rather more distinct fold than M. rissoina, the 

 type of this so-called genus. 



TuRBONiLLA BRACHXA. (Plate XXIII. fig. 21.) 



Testa minima, hrevis, turrita, pellucida, albida, nitida ; anfractus 

 4|, apicales Iceves, convexi, tres sequentes convexiusculi, sutura 

 profunda paulo obliqua sejuncti, costis bene arcuatis circiter 

 20 {in anfr. ultimo inferne attenuatis) iyistructi, paulo infra 

 suturam, sulco inconsp)icuo, costas secanti, sculpti ; apex 

 maximus, obtusus ; apertura ovalis, superne acuminata, longit, 

 totius 3 udcequans ; columella leviter reflexa, spiraliter torta, 

 labro callo tenui juncta. 

 Longit. 1| miilim., diam. \. 



The short stumpy form, the very large obtuse apex, the much 

 curved ribs, and the deep suture are the principal distinguishing 

 features of this little species. 



Ttjrbonilla (Dunkeria) eritima. (Plate XXIII. fig. 22.) 



Testa subulata, pellucida, vitrea, nitida ; anfractus normales G, 

 convexi, liris longitudinalibus numerosis, arcuatis {in anfr. 



