MACKOCnLAMYS. 85 



The jaw has a central projection. 

 The radula formula is : 



25 . 1 . IS . 1 . 18 . 1 . 25 = 44 . 1 . 44 



The central tooth is rather narrow, long, tricuspid; the ad- 

 median also on narrow plates, Mith one side cusp ; the outer teeth 

 are unevenly hicuspid. The breadth of the central portion is far 

 greater than that of both the marginal parts. 



This species, as regards its shell, may at a casual glance very 

 easily be mistaken for M. ricJnlaensis ; it is, however, a much 

 stronger shell and not so globose. The animals are very differently 

 coloured, particularly in the distribution of colour; and there is 

 great diversity in the generatiAc organs.] 



b. ^ot labiate. 

 a'. Snhturhinate. 



125. Macrochlamys hodgsoni, Bs. [Blf. MS., Helix) A. M. iV. H. (3) 



iii, iSo!), p. 2(17 : Pf,-. (Helix) Mon. Hel. v, 1868, p. 110; H. 8,- T. 

 (Helix) C. /. 1876, pi. 31, tigs. 2, 3; Nevill, Nauiua (Micro- 

 cystis), Hmicl-l. \, 1878, p. 38; [Godtcm-Ansteu, Mol. Ind. ii, 

 1907, p. lo9, pi. 109, figs. 1, 1 « (typical), 2-2 rf]. 



Shell narrowly perforate, depressedly subglobose, thin, smooth, 

 dull, very finely and closely decussated under the microscope with 

 transverse and flexuous longitudinal striation, pale yellowish 

 horny ; spire couoidal, apex obtuse, suture impressed : whorls 5, 

 convex, the last rather broader, rounded but very slightly com- 

 pressed at the periphery, convex beneath ; aperture slightly oblique, 

 rather roundly lunate, broader than high ; peristome thin,columellar 

 margin much curved, vertical above, rather broadly triangularly 

 reflected. 



Major diam, 7, min. 6, height 44 mm. 



Hah. Sikhim, at low elevations'; Pankabari, 1000'; [hills east 

 of Teesta up to 10,0()0'j. 



[From the Kichila Peak I have a large number, some very fine, 

 with the same distinguishing sculpture. The largest measures 

 8 mm, in major diameter ; and these fresh specimens are all of a 

 brown-umber colour, with a slight green tint. I found only very 

 young specimens preserved in spirit. Eight and left sheli-lobes 

 are present, the last large. Extremity of foot with a long lobe. 

 Visceral sac with 4 transverse narrow black streaks. Jaw with 

 a central projection ; in the radula the central and admedians 

 are narrow and long, one cusp on outer margin ; laterals bicuspid 

 and even. Formula: 



50 . 2 , 7 . 1 , 7 , 2 . 50 about 



59 , 1 . 59] 



