466 Zoological Society. 



This is a Port Arthur freshwater species, for which the author 

 expresses himself indebted to Mr. Lempriere. It differs from the 

 common freshwater eels of Europe in the more posterior origin of 

 the dorsal, as well as in the more anterior position of the vent. The 

 pectorals are lanceolate, the vertical fins are but moderately high, 

 and the gape extends to the posterior margin of the orbit. 



4. Narcine Tasmaniensis, dorso dipterygio, corporelate obovato ; 

 valvuld nasali obtuse trilobatd integerrimd ; pinna ventrali disco 

 pectorali approximatd. 

 The author having but recently had an opportunity of consulting 

 Henle's Monograph of the genus Narcine, takes this opportunity of 

 supplying a specific character of the Van Diemen's Land species, 

 which was formerly described to the Society (Zool. Proceed, for 

 March 1840, p. 29), but which could not be distinctively character- 

 ized from his want of knowledge of the other species. 



A paper by W. J. Broderip, Esq., in which the author proceeds 

 with his descriptions of Mr. Cuming's shells, was next read. 



Helix cryptica. Hel. testa tumidd, subumbilicatd, subglobosd, 

 anfractibus 3 subcorrugatis {ultimo longe maximo, obscure fascia - 

 to), lineis incrementi creberrime oblique substriatis, purpureo- 

 brunned, epidermide sordide brunned ; aperturd subelongato-auri- 

 culiformi, intus subargenteo-ccerulescente, subiridescente ; labii 

 limbo rubro-brunneo, haud patulo, reflexo. 

 Long. If ; lat. 2 J poll. 



Hab. ad Catbalonga Insula? Samar sub foliis desiccatis. 

 Mr. Cuming found this Helix hidden under the decayed leaves of 

 trees. The inside of the mouth has that silvery iridescence which 

 may be observed in the tendon of a muscle in some of the mammife- 

 rous animals, and through it may be seen the purple-brown colour 

 of the shell, which thus puts on a subcserulescent appearance. 



Helix latitans ? Hel. testa subtumidd, subcomplanatd, purpureo- 

 rubrd, anfractibus 3 lineis incrementi creberrime striatis {ultimo 

 longissime maximo), epidermide sordide albente'; aperturd maxima 

 e brunneo subalbido-iridescente, labio patulo, reflexo, rubente, albi- 

 do interne limbato. 

 Long. 1^ ; lat. 2f poll. 



Hab. ad Gindulman Insulse Bohol sub foliis desiccatis. 

 At first sight, this Helix, which was also found by Mr. Cuming 

 under decayed leaves, looks a good deal like H. cryptica ; but on a 

 nearer inspection not only will a difference in form almost inde- 

 scribable be observed, but also in the texture of the shell, which is 

 without corrugations. The mouth too is much wider and broader, 

 and the reflected lip much more patulous. The silvery iridescence 

 of the mouth extends but a short distance within the aperture, but 

 the polish is continued far in. Still it may only be a variety of H. 

 cryptica. 



Helix cretata. Hel. testd subglobosd, tumidd, anfractibus 3 (ul- 



