734 MR. E. A. SMITH ON WEST-AFRICAN SHELLS. [Dec. 5, 



62. Ianthina balteata, Reeve, Conch. Icon. xi. sp. 11. 

 Hab. North Atlantic ? 



63. Scala miranda, sp. nov. (Plate LXXV. fig. 15.) 



Testa pyramidalis, imperforata, grisea ; anfract. 8, perconvexi, va- 

 ricibus obliquis numerosissimis tenuissimis (in anfract. ultimo 45) 

 omati ; spiraliter minute sed distincte striati ; apertura subcir- 

 cularis. 



Long. 9 mill., diam. 4. 



Hab. Whydah. 



A very numerously and finely variced species, with very convex 

 whorls. 



64. Scala bairdii, sp. nov. (Plate LXXV. fig. 14.) 



Testa elongata, subturrita, imperforata, albido-purpurascens ; an- 

 fract. 9, subconvexi, costis crassis curvatis (in anfract. ultimo 

 14) instructi, spiraliter minutissime costas inter et supra striati ; 

 apertura ovata. 

 Long. 11 mill., diam. 3*. 

 Hab. Whydah. 



This is very distinct from any species yet known. The ribs are 

 produced on to the whorls above, giving the sutural line a neat wavy 

 appearance. Named after my kind friend Dr. Baird. 



65. Aclis carinata, sp. nov. (Plate LXXV. fig. 20.) 



Testa elongata, sordide alba; anfract. 9, perconvexi, transverse 

 tenuiter sulcati ; ad peripheriam subacute carinata ; apertura 

 ovata, basi effusa. 



Long. 10 mill., diam. 2\. 



Hab. Whydah. 



A very graceful shell, with neatly sulcated whorls. The keel at 

 the periphery is very remarkable. 



66. Monoptygma (Myonia) puncturata, sp. nov. (Plate 

 LXXV. fig. 16.) 



Testa parva, elongato-ovata, subpellucida, brunneo-albida ; anfract. 

 4, convexi, spiraliter valide punctato-sulcati ; in anfract. ult. sulci 

 17; spira brevis, apice obtuso ; apertura subovata, | longitu- 

 dinis paulo superans, basi subeffusa,marginibus callo tenuijunctis ; 

 columella obliqua torluosa. 

 Long. 5 mill., diam. 2. 

 Hab. Whydah. 



The sculpture agrees with that of M. amana, A. Ad. Proc. Zool. 

 Soc. 1851, p. 223, from the Philippines; but the convexity and 

 number of the whorls, the shortness of the spire, and the obtuse apex 

 are sufficient characters by which it may readily be distinguished. 



67. Obeliscus (Syrnola) gracillima, sp. nov. (Plate 

 LXXV. fig. 17.) 



Testa imperforata, gracilis, elongata, polita, alba ; anfract. 1 1, 



