MOLLDSCA OF INDIA, 337 



1. North-W est Himalaya. 

 The vallej'S of the Jumna, Ganges, and Kali to Nipal. 

 Alyc^tjs steangttlatus, T. Hutton. (Plate CXXXVI. figs. 1, la.) 



Pfeiffer, Zeitschr. fiir Malak. 1846, p. S6 ; id. Mou. Pneum. vol.i. 

 p. 120; Kiister ed. Chemn., Cyclostoma, pi. 17. figs. 7 tfe 8, and 

 pi. 38. fig. 35 ; Benson, A. M. N. H. iii. 1859, p. 177 (sec. 2, Charax 

 — subsec. **) ; Blanford, A. M. N. H. June 1864, p. 458 (section vii 

 — tj-pe of a subsection, a ridge crossing the constriction not recurved ; 

 shell depressed) ; Hanley, Conch. Ind. pi. xciii. tigs. 2 & 3 (1870); 

 Theob. Supp. Cat. p. 40 (1876); NeviU, Hand-1. i. p. 290 (1878) ; 

 Von Mollendorff & Kobelt, I^achrbl. Deutsch. Malak. Ges. 1897, 

 p. 149 (sec. Charax). 



In a paper entitled " Nachtrag zur Revision der Gattung Cyclo- 

 stoma," by Dr. L. Pfeifi'er, he describes Cyclostoma stranyulatum, 

 Hutton, as follows : — 



" T. late umbilicata, depressa, subdiscoidea, tenuis, subtilissime 

 costulato-striata, corueo-hyalina ; spira vix elevata, obtusiuscula ; 

 aufr. 4, convexi, ultimus latere in flatus, prope aperturam strangu- 

 latus, antice angustatus ; apertura obliqua, circularis ; perist. 

 simplex, album, sat incrassiato-expansiusculum, marginibus approxi- 

 matis, callo junctis. Operc. raembrauaceum multispirum. Diam. 

 4i, alt. 2| mill. 



" Habitat in Bengalia (v. d. Busch).'" 



The shell is carried high in the air, and clear of the foot, showing 

 a strong muscular power in the neck. A movable orange spot is 

 apparent in the head, and which moves down to the snout. I once 

 succeeded in passing a hair through the sutural tubes or callus into 

 the aperture of the shell. 



This description was made by Mr. Benson from specimens of 

 Alycceus strangulatus taken at Laudour in 1842. Strangulatus is 

 described in Zeitsclir. fiir Malak. 1846, p. 86, and Conch.-Cab. 

 p. 104; amended, Zeitschr. 1851, p. 7; and for constrktiis, Ann. 

 Nat. Hist, vol. viii. p. 188 (1851), and for amended description 

 vol. X. p, 272 (1852). 



The specimen I have figured is from the typical locality Mus- 

 soorie (number 2501, B.M. Coll.). In Kumaon specimens the 

 costulation is finer all over and not so defined and distant near 

 the sutural tube. General form of the tube the same, the swelUng 

 near the constriction higher. From Naini Tal specimens are ot 

 similar character. 



2. Siklim and the Teesta Valley, ivith Western Bhutan. 



Includes Darjiliug, down to the base of the hills. 



Alyc^us crentjlattts, Benson. (Plate CXXXIII. figs. 1-1 c.) 



A. M. N. H. ser. 3, vol. iii. 1859, p. 180 ; Pfr. Mon. Pneum. 

 vol. iii. p. 55; Hanley, Conch. Ind. 1870, p. 39, pi. xcvii. 



