50 LAXD AND FRKSHWATKR 



in the shells sufficiently well marked, but I would call attention 

 again to what I have written on the top of p. 116, Part IV. 

 M. atricolor departs from true Macrochlamys in the absence of the 

 true shell-lobe and differently constructed left neck-lobe. Nothing 

 can be more distinct than this : and although there is nothing very 

 different in the form of the teeth of the radula, yet the proportion 

 of centrals and laterals is not the same (see Part IV. p. 115). 



A very similar departure from MacrochJamys is to be found in 

 stejjJnis, Benson, of the Andamans, where the left sheU-lobe is 

 absent, the mantle being turned back as a narrow border over the 

 edge of the peristome, while there is a corresponding change in 

 the neck-lobe. We have here a character of more than specific 

 value, as I have said before ; previous to establishing it as such, we 

 require more material to work with. 



Maceochlamys KOLiAEifsis, G.-A. (Part IV. p. 119, Plate XXVI. 

 figs. 5, 5 a). 



Mr. Tryon (Man. Conch., Zonitidae, p. 101, 1886) points out that 

 this name has been used before, and he has substituted that of 

 god}vini. 



OxTTKs sTLvicoLA, W. Blanford (Part IV. p. 131, not figured). 



The glandular extremity of the foot with no overhanging lobe. 

 Pedal line well marked. The radula agrees with that of 0. orobia, 

 Bs. : formula 46 . 17 . 1 . 17 . 46 = 63 . 1 . 63. 



AusTENiA PLANospiRA, Benson (Part IV. p. 149, Plate XXXVI. 

 figs. 1-5 d, & Plate XXXVIII. figs. 1-1 b). 



In a paper " On the Distribution of Indian Terrestrial Gastero- 

 poda," Theobald (J. A. S. B. 1863, pp. 365-369) places Vttrina 

 planospira, Bs., of 8ikkim in the genus Cryptosoma, but on insuffi- 

 cient grounds. 



Genus Cryptosoma, Theobald. 

 {Continued from Part 1. p. 14. Plate IV., 1882.) 



This proves to be a good genus, and, with further material to 

 examine, it is interesting to be able to extend the range very 

 considerably. HeUcarion siamensis, Haines, of which I obtained 

 two specimens in very good preservation from ]\Ir. E-. Damon, un- 

 doubtedly belongs to it. Colonel K. G. Woodthorpe, E.E., C B., who 

 made a very good collection of land-shells on his journey from the 

 Shan States to the Mekong River in 1895, has added another species 

 very distinct from C. prcestans. Pinally, Dr. Hungerford kindly 

 gave me some specimens of Helicanon imjnrafor, Gould, from Hon"-- 



