1875.] G-. & H. Nevill — Descriptions of new Marine Mollusca. 91 



Clathueella Martenst, n. sp., PI. VII, Fig. 8. 



Shell regularly and conically fusiform, of rather dark hrown colour with 

 bright lilac granules ; seven rounded whorls, reticulated with very thick 

 somewhat distant ridges, forming at the points of intersection, three rows 

 of large, pearl-like, slightly oblong granules, on the last whorl these three 

 rows of granules are repeated, after the sixth row the shell abruptly becomes 

 contracted, forming an excavated furrow, near the base there are again 

 six rows of granules, but much smaller and more rounded, these give a some- 

 what angular appearance to the last whorl ; the columella is much contorted, 

 or twisted in the middle, of a lilac colour, with a few minute denticulations at 

 its edge ; the aperture and the four strong denticulations at its outer edge 

 are also of a lilac colour, the sinus is deep and rounded, the outer lip is 

 bright brown, abruptly contracted near its base, forming a strongly marked 

 canal. 



Long. 5, diam. 2 mil. 



Tolerably abundant in sand from Balapiti in Ceylon. 



(Coll. Indian Mus. and H. Nevill.) 



Clathttrella engisldeokmis, n. sp., PI. VII, Fig. 9. 



Shell narrowly elongate, convex, in shape resembling several species of 

 the genus Mngina, peculiarly attenuated and contracted towards the base, 

 spire pointed ; white, banded with a single somewhat irregular yellow band, 

 repeated a little below the middle of the last whorl, some of the granules 

 on this band are yellow, whilst others are white ; whorls seven, distantly 

 reticulated with thick, obtuse, longitudinal and transverse keels, the 

 interstices, under a lens, minutely and closely longitudinally striated, 

 the sculpture is very distinct and clearly marked on the last two whorls, 

 but much confused and difficult to trace on the upper ones ; as in the pre- 

 ceding species, pearl-like granules are formed where the ridges cross one 

 another, in the present shell however they are more regular in size and 

 more rounded, there are three rows of these granules on each whorl, 

 besides an additional smaller one and some indistinct transverse ridges close 

 to the suture ; there are ten longitudinal keels on the last whorl ; sinus deep, 

 but rather contracted, bent down rather abruptly ; aperture very straight 

 and narrow, suddenly widening a little close to the end of the canal, seven 

 rather large regular granules at the inner margin of the outer lip. 



Long. 5J, diam. 2| mil. 



In sand from Balapiti in Ceylon. 



(Coll. Indian Museum and H. Nevill.) 



