64 Zoological Society. 



the superior whorls these lines cover the whole surface. The folds 

 terminate on the angle, and are disposed to be nodulous there. The 

 aperture is rounded, angular above, and not quite one-third the length 

 of the shell. The base of the shell is rounded. 



Melania recta. M. testd plicatd, attenuatd, suhcrassd, tenehroso- 

 castaned; spird valde elevatd ; suturis irregulariter impressis, sub- 

 canaliculatis ; anfractibus tredecim, subplanulatis ; plicis numero- 

 sis ; aperturd parvd, ovatd, ad basim rotundd, intus carulescente ; 

 columelld incurvd. 

 Hob. Very small streams, Siquijor and isle of Negros, Philippines. 

 Length 1*7, diam. '5 of an inch. 



Remarks. — In many of its characteristics this species is like the 

 M. costellaris. It differs entirely, however, in the enlargement of the 

 last whorl, the angle on the superior part of it, and in the channel 

 below the suture, which are important characters in the costellaris. 

 Nor has it the minute revolving lines. The folds are remarkably 

 regular and distinct, and number about eleven on each whorl in the 

 eight specimens under examination. On two individuals the epi- 

 dermis remains quite perfect, and is deposited in regular, revolving 

 striae. The aperture is about one- third the length of the shell ; it 

 is rounded below and angular above, where it is slightly set off from 

 the body of the whorl. The columella is but slightly curved. 



Melania australis. M. testd plicatd, conicd, tenui, diaphand, 

 rubiginoso- corned ; spird costatd, prope apicem turbinatd ; suturis 

 impressis ; anfractibus septem, convexis, ad basim striatis ; plicis 

 numerosis ; aperturd magnd, ellipticd, intus salmonid ; columelld 

 tortd; labro super ne emarginato. 

 Hab. Victoria river. North Australia. 

 Length '9, diam. '4 of an inch. 



Remarks. — This is a very distinct little species, and the sudden 

 enlargement of the third whorl below the apex gives it a somewhat 

 turbinated appearance. The folds do not on the lower whorl reach 

 the suture, and above and below these folds there are minute re- 

 volving striae. The aperture is more than one-third the length of 

 the shell. The outer lip is slightly crenulate and remarkably in- 

 curved near to its junction with the body whorl. 



Melania tornatella. M, testd plicatd, fusiformi , crassd, comedy 

 infern^ lineatd ; spird acuminatd ; suturis irregulariter impressis ; 

 anfractibus novem, convexius cutis, ad apicem mucronatis, in medio 

 concavis ; plicis numerosis, crebris ; aperturd constrictd, elongatd^ 

 intus albd ; labro superne incisd ; columelld l<£vi, crassd, contortd, 

 reflexd. 

 Hab. Shallow rivers, Tanhay, isle of Negros, Philippines. 

 Length '9, diam. '35 of an inch. 



Remarks. — This belongs to a very remarkable group of Melania. 

 The emargination of the outer lip, above the middle of the whorl, is 

 strikingly characteristic of the group. It causes a slight flatness or 

 convexity of the whorl, as well as a curve in the numerous ribs, which 

 cover the whole surface in this species, except where it is superseded 



