ISl Mr. <i. 1>. Soweiby on new 



tympanum ; subarticular tubercles feeble ; an outer tarsal 

 fold. Tibio-tarsal articulation reaching the tip of the snout. 

 Skin smootii, finely granulate on the head, coarsely on the 

 belly and under the thighs ; deep wrinkles form an areolation 

 on each side of the anterior part of the body. Bright green 

 above, yellowish white beneath ; hand and arm, tarsus and 

 foot, and upper eyelid with a white edge ; arm and thigh 

 colourless, the latter with a narrow green band in the middle. 



From snout to vent 52 mm. 



A single specimen from Northern British New Guinea, 

 altitude 900 feet. 



Most nearly allied to H. gracilenta, Peters, and H, chloria, 

 Blgr. 



XXI. — Descriptions of neio Species of Marine Shells^ chiefly 

 from Ceylon. By G. B. Sowerby, F.L.S. 



The shells here described formed part of the collection of the 

 late Mr. Hugh Nevill. As very few of them were labelled, 

 it is impossible to fix their habitats with any certainty, but 

 the probability is that most, if not all, of them are from 

 Ceylon. 



Fam. Trochidse. 



Calliostoma planiliratum, sp. n. 



Testa conica, elata, angustissime rimata, albida, rufo-fusco et olivaceo 

 dense strigata et variegata ; anfractus 8|, primi 2 Iseves, rotun- 

 dati, deinde planato declives, liris 7 confertis planulatis cingulati, 

 cingulis duobus infernis magis elevatis ; anfractus ultimus levis- 

 sime concavus, liris duplicatis ; basis planulata, vix convexa, 

 liris 9, angustis, rotundatis, albo-fusco artieulatis, interstitiia 

 oblique striatis ; apertura oblique subtrigona, intus margari- 

 tacea, baud lirata ; columella brevis, rectiuscula, leviter callosa. 



Alt. 13, diam. 10 mm. 



A high conical shell with an almost flat base. It has very 

 close flattened spiral ridges, which in the last whorl are some- 

 times, as in the type, divided by a groove. The colouring 

 of olivaceous brown, reddish here and there, is mostly dis- 

 posed in close broad longitudinal streaks, which on the upper 

 whorls are broken up into square spots, giving the ridges an 

 articulated appearance. 



Although of a not uncommon form, I know of no species 



