MOLLUSCA OF INDIA. 415 



close costulation ; colour dull white ; spire high conic, apex 

 rounded; suture well impressed, the sutural tube very long; 

 whorls with sides very rounded; aperture circular, vertical; 

 peristome strong and thickened, double. 



Size : maj. diam. S'lO; alt. axis 2-70 mm. 



This species, although very similar in all main characters to 

 the Indian forms, as I said in 1888, is certainly quite worthy of 

 separation. Compared with typical urnula, Bs., from Darjiling, ib 

 is more solid and smoother, costulate sculpture on last whorl some- 

 what stronger, the umbilical margin more circumscribed, peristome 

 solid, aud particularly in the distance from base of the sutural 

 tube 'to the peristome being very short, forming the constricted 

 part of the whorl, when it is compared with typical D. urnula from 

 Darjiling and the variety from the Naga Hills, &c. ; it thus 

 approaches the constriction of D. amijliora. 



Altc^us (Diortx) FEDDBNiANtrs, Theobald. (Plate CLIII. 

 fig. 12.) 



Theobald, J. A. S. B. xxxix. pt. 2, 1870, p. 397, pi. xviu. fig. 4 ; 

 Hanley & Theob. Conch. Ind. 1870, p. 38, pi. xci. tigs. 1, 4; Theo- 

 bald, Cat. Supp. p. 39, Upper Salwin Valley ; G. Nevill, Hand- 

 list, p. 294, 4 near Moulmein, Dr. Hungerford, 2 Shan States, 

 E. B. Fedden, typical. 



Specimen figured No. 2694 B.M. Coll. 



Original description : — " Testa glohoso subturUnata, profunde um- 

 hiUcata, glabra, in ultimo anfractu ad suturam peculiariter deplanata, 

 deinde mbangidata et infra nngulum levissime convexiuscula sm 

 planataet angustata, solida, brunnea ; anfradihus ^, rainde cres- 

 centibus, super'ioribus coiwexiuscidis, ultimo supra et 2^rope umbilicum 

 angulato; tubulo suturaU tenui, prope apertaram oriente et fere 

 dimidium ultlmi anfraotus in longitudine cequante ; strictura brevis- 

 sime, vix conspicua ; apertura circulari, carneola, supra angustissime 

 adnata ; perist. duplici, interna integro, tenuissimo, externa breviter 

 exjoansiuscido et rejiexo. 



" Diam. maj. 2o, d. min. 16, alt. 16 unc. 



" Habitat. Shan States. 



"This shell is an interesting addition to the Dioryx group, the 

 only other Pegu form being A. {Dioryx) ampJiora,B., first procured 

 by myself at Moulmein. The latter is a very variable shell in size, 

 unless two forms have been confounded under it, and Mr. Fedden's 

 collection contained two examples of it from the Upper Salwin, 

 but I have not the means of re-examining these just now. 



" Out of four species of Alycceus collected by Mr. Pedden three 

 are new ; so that when greater facilities exist for examining this 

 region, we may look for large additions to this very interesting 

 genus of operculated land-shells." 



Alycjsus (Cyclortx) difficilis, n. sp. (Plate CLV. figs. 2, 2 a.) 

 Locality. Shan Hills, 2 specimens. No. 22.06.5.5 Blf. Coll. 

 B.M. {Fedden). 



