354 Catalogue of Terrestrial uind [June, 



Out of a collection of 32 European Clausilice, I find none "with a 

 similar obliquity of mouth, from which character I have named the 

 species. The outer lip projects beyond the plane of the aperture. The 

 crenulations of the sutures differ altogether from the papillary appear- 

 ance which is common to several species, such as papillaris, albo- 

 gutfata, &c, and they are not elongated as in C. nitida. 



14. Scarabus triangularis. Testa, compressa ovato-conica, setate 

 subtriangulari, cornea, fasciis castaneis plurimis interdum obsoletis 

 cincta, rugis longitudinalibus salcisque transversis, distantibus, inter- 

 rupts decussata. Spira acuta breviori ; suturis obsoletis. Anfractus 

 ultimi varice saliente lamelliformi. Apertura quadridentata, biplicata ; 

 dentibus, uno insuper columellarium, tribus super costulam intro- 

 labialem sitis ; plica una columellarii duplici, pandata, altera columella 

 recurva, parva. Umbilico lineari, transversali, pene clauso. Length 0.9. 

 Breadth 0.65 inch. 



This shell, independently of its form, sculpture, colouring, and acute 

 varix, may be at once distinguished from Scarabus imbrium by its 

 peculiar umbilicus ; that feature being rounded and perforate in the 

 Malassan species. The number of teeth on the rib, which is situated 

 at some distance within the outer lip, is very variable, ranging from 

 three to seven ; of these three are always more prominent. In wea- 

 thered specimens the subordinate denticulations are generally unob- 

 servable. Occasionally the whole of the shell is of a dark chestnut 

 colour, with obscure bands of a more saturated colour. In his Synop- 

 tical table, Db Ferussac mentions two species from Bengal, S. plica- 

 tus and <S. Petiveri, both distinct from >S. imbrium. As he gives no 

 description, I am unable to say whether our shell is identical with 

 either or both : the latter contingency may possibly be the case, consi- 

 dering the great difference of form observable between young and 

 aged specimens, and the uncertainty attendant on the species S. 

 Petiveri, which appears to have been established solely on the inspec- 

 tion of a plate, no reference being made to any museum. 



All the specimens of the shell in the collection are weathered, and 

 in that state appear of a livid purple colour ; this circumstance was, 

 however, amply compensated for by an excursion which I made with 

 Dr. Pearson to the alluvial island opposite to Fort William, in quest 

 of objects of natural history, during which that gentleman discovered 

 the live animal under decayed vegetation, and under bundles of the 

 hoogla grass cut down for sale. From these retreats, which it occupied 

 in company with the amphibious Assiminia Gangetica, we made a 

 large collection in a short space of time. I have searched for it in 

 vain on the neighbouring mainland, in the vicinity of the Bishop's 



