62 Zoological Society. 



Melania cochliditjm. M. testd laevi, subulatd, subcrassd, rufo- 

 corned; spird elevatd, acuminatd, ad apicem minute plicatd ; sutu- 

 ris regulariter impressis ; anfractibus tredecim, subcompressis, an- 

 fractu ultimo supra angulato, magno ; aperturd late ovatd, parvd, 

 ad basim retusd, intus albidd ; columelld regulariter incurvd. 

 Hab. Very small streams, islands of Siquijor and Guimaras, Phi- 

 lippines. 



Length l - 5, diam. '5 of an inch. 



Remarks. — This is a very remarkable species, having a single ele- 

 vated, revolving rib on the superior part of the last whorl, which 

 causes a somewhat impressed channel above. The four specimens 

 under examination from Siquijor are fresh and with perfect epi- 

 dermis, which varies on the younger specimens to rather a pale horn- 

 colour, while the more mature ones are of a reddish horn-colour. 

 The four from Guimaras are "dead shells," rather more robust, 

 with a portion only of the epidermis remaining, which is rufous. 

 The aperture is about one-fourth of the length of the shell. The 

 operculum has its polar point near the base on the left side. 



Melania cincta. M. testd Icevi, subulatd, subtenui, rufo-cas- 

 taned ; spird valde elevatd, acuminatd, ad apicem plicatd ; sutu- 

 ris impressis, linearibus ; anfractibus tredecim, subconvexis ; an- 

 fractu ultimo uno-vittato ; aperturd dilatatd, ovatd, intus fusco 

 fasciatd, ad basim rotunda ; columelld contortd. 

 Hab. India. 



Length 2*2, diam. *6 of an inch. 



Remarks. — The form of this species is very much like that of 

 Melania aculeus (nobis), but it is a more attenuate species. The 

 single light band on the lower whorl seems to be peculiar to this 

 species. It is below the middle part of the whorl, and is distinctly 

 visible on the inside in the three specimens under examination. The 

 upper whorls have regular, oblique, somewhat distant folds, on two 

 of the specimens, which are crossed by minute striae. The lower 

 part of the whorl has indistinct striae. The aperture is not large, 

 being less than one-fourth the length of the shell, and it is rounded 

 at the base. The columella is much incurved. 



Melania lancea. M. testd Icevi, subulatd, subtenui, corned; 

 spird elevatd, ad apicem striata ; suturis impressis ; anfractibus 

 duodecim, convexis ; aperturd ovatd, intus albidd, ad basim ro- 

 tundd ; columelld angulariter incurvd. 

 Hab. Ohcataroa, Society Islands. 

 Length 1*6, diam. *5 of an inch. 



Remarks. — This species is in form somewhat like the M. aculeus 

 (nobis), but is a smaller shell and not quite so attenuate. In the 

 four specimens under examination small striae are distinctly marked 

 on the superior or younger whorls, and on two of them some of the 

 striae are continuous on the lower whorls. The aperture is not 

 large, being not quite one-third the length of the shell. The colu- 

 mella is much incurved and recurved. 



