152 



fuscis di stantibus biseriatim cincta, versus margines tuber- 

 culato-incrassata ; columella contorta, acuta. 



Shell subulate, acuminate, amber-coloured; whorls flat- 

 tened, even a little contracted, girdled, longitudinally provided 

 with small sharp arched folds, tranversely lightly striated ; on 

 each margin of the inferior area is a series of distant reddish 

 punctuations ; last whorl sulcate at the base. Aperture 

 somewhat oval. Columella twisted, with a very sharp 

 margin. 



Two specimens of this elegant species are in the collection 

 of Mr. Cuming, without any history attached to them ; they 

 have evidently been highly cleaned, but retain the appearance 

 of having been once covered by an epidermis. 



The native country is unknown. 



5. T. ROBUSTA. (pi. xlii. f. 35.) Hinds, 1. c. p. 149. 



Testa turrito-subulata, solida, ponderosa, albida, flammeis 

 longitudinalibus interrupte picta ; anfractibus inferioribus 

 rotundatis, indivisis, laevigatis, superioribus versus extremi- 

 tatem spiree subplanulatis, unocinguliferis, longitrorsum plica- 

 tis ; anfractu ultimo rotundato, triseriatim picto, ad basin 

 coarctato ; apertura elongata ; columella arcuata, subcallosa ; 

 epidermide luteo-fusca ; operculo parvo, crasso. 



Shell elongated, subulate, turrited, smooth, solid, white, 

 with interrupted longitudinal reddish-brown spots ; whorls 

 girdled, but only visible on the superior ones, the last with 

 three series of markings, suddenly contracted inferiorly ; 

 aperture elongated, with a short canal ; columella arched, 

 and covered by a thin callus. Operculum small and thick. 

 Epidermis thicker than is usual. 



West coast of America, between 8° 57' and 21° 32' north 

 latitude ; namely at Panama, Gulf of Nicoya, Gulf of 

 Papagayo, and San Bias ; in from four to eighteen fathoms, 

 sandy mud : Cuming and Hinds. 



6. T. ORNATA. (pi. xlii. f. 34. Gray, Proceed. Zool. Soc. 

 1834, p. 62. 



Testa conico-subulata, turrita, solida, alba, maculis rufis 

 subquadratis triseriatim ornata; anfractibus planulatis, an- 

 gustis, linea valde impressa cinctis, apertura subquadrata ; 

 columella arcuata, acuta ; breviter canaliculata ; epidermide 

 tenui induta. 



Shell conical subulate, turrited, solid, white, with three 

 series of reddish-brown square spots; whorls flat, narrow, 

 deeply girdled ; one series of spots above the girdle, rather 

 smaller and paler than the others ; two below it, which are 



