58 



brown spots, which have the form of the summits of Gothic windows, 

 and in which the deep brown of the summit fades in descending to the 

 middle of the whorls, where the shell is transparent ; with three lin- 

 ear spiral series of alternating white and brown on the middle and 

 anterior part of the last whorl : with spiral stride anteriorly, otherwise 

 smooth: apex acute: spire with the outlines nearly rectilinear: 

 whorls eight, nearly planej with a lightly impressed suture: aperture 

 in the form of a c> but i-ather wider : labrum thickened and well ex- 

 curved, smooth within, sinuate above. 



Mean divergence 30° ; length of spire .16 inch; total length .25 

 inch ; breadth .08 inch. 



CoLUMBELLA coSTULATA. Shell moderately elongated, ovate : 

 whitish, with an ill-defined spiral band of very pale yellowish brown 

 on the middle of the whorls, with the same color anteriorly ; with a 

 series of large deep brown spots at the summit of the whorls and also 

 before the middle of the last whorl : with obtuse longitudinal ribs, 

 about twelve on each whorl, and unequal spiral striae : apex subacute : 

 spire with moderately convex outlines : whorls about five and one-half, 

 a little convex, with a well impressed suture : aperture small : labrum 

 with a broad highly polished varix, denticulate within, sinuate above. 



Mean divergence 40°; length of spire .12 inch; total length .19 

 inch ; breadth .09 inch. 



This species was described in Mss. five years since, but being in- 

 formed that it was identical with C. pygmaea Soioh just published, I 

 suppressed the description and distributed the shell as C. pygmaea. 

 It proves to be quite distinct. 



Terebra Jamaicexsis. Shell not very ^lender, regularly taper- 

 ing above the last whorl: slate colored, with a series of darker spots 

 on a white spiral stripe next below the suture ; with a white spiral line 

 emerging from the top of the aperture, and a brown one trom the mid- 

 dle of the same ; white between the brown stripe and the columella : 

 with lonsjitudlnal unequal wrinkles, which extend from the suture 

 nearly to the middle' of the whorls ; with excessively minute lightly 

 impressed spiral striae: apex acute: spire with the outlines almost 

 rectilinear: whorls twelve or thirteen, nearly plane: aperture long 

 ovate : notch wide : columella slightly twisted. This species closely re- 

 sembles the more slender T.stylata Hinds of the Philippine Islands. 



Mean divergence 16"; length 1.9 inch; breadth .*43 inch. 



Purpura aberrans. Shell ovate or subfusiform : white : longi- 

 tudinally plicately ribbed ; with close-set, well elevated spiral ridges 

 which are continuous over the longitudinal folds, and are closely and 



