MOLLUSCA OF INDIA, 



153 



minute, and towards the margin the teeth are nearly aculeate, only 

 a very minute notch indicating the cusp. 



A closely allied species, larger and in other respects differing 

 from tuqurium, is M. dalimjensis, described in Vol. I. p. 121, 

 Plate XXXV. (Oct. 1883) of this work. This has recently been 

 included in a paper by the late Dr. W. T. Blanford, ' Proceedings of the 

 Malacological Society,' vol. iv. pt. 4, March 1901, "Note on Benso7ua 

 maimvarinqi and MacrocMamys dalmgensisr He particularly points 

 out the peculiar character ot! a labiate aperture at different stages 

 of growth presented in Bcnsonia monticola and Helix celox, Benson, 

 MS and he relates why the latter was never described. Fortu- 

 nately the typical shell of H. celox is in Dr. Blanford's collection 

 and he was able to show it to be the same as one to whicli 

 Nevill attached the name mainwaringi ; he obtained this from 

 Darjiling and named it after Colonel Mainwaring, its collector. 

 Mr. Nevill also wrote the same name on a drawing of Stohczka's of 

 a Darjiling species, and I am responsible for having first put Nevill's 

 MS. name maimvarlngi into print. I now feel certain that the shell 

 of the animal figured by StoUczka cannot be connected with the shell 

 sent to me some six years after by Nevill and figured by Blanford 

 on p. 182 (loc. cit.) = celox. The question requires some further expla- 

 nation. In 1883 I published a paper in the ' Journal of the Asiatic 

 Society of Bengal ' on the drawings left with Stoliczka's collection 

 of MoUusca in Calcutta when he was appointed Naturalist to the 

 Yarkand Mission. Among them fig. 5, plate 5,= figure No. 49 of the 

 drawings, represents Nanina camum, as identified, and correctly so 

 I consider, by Nevill. No name, only the locality " Darjiling," had 

 been given by Stoliczka. In spirit-specimens of this last species 

 it is interesting to find that the extremity of the foot is truncate 

 and the lobe above small and blunt, very different to the long 

 pointed lobe in spirit-specimens of Macroclilamys tugurium, vide 

 fig. 46 of Stoliczka's drawings, one of which was not included in my 

 paper of 1883, as it had already been copied on Plate XIX. fig. 2 of 

 ' Land and Freshwater Mollusca of India,' January 1883. The different 

 form of the mucous glands noted above in spirit-specimens is well 

 brought out in these two drawings, and shows, moreover, how 

 reliable is the work of the native artist Stoliczka employed. _ Nevdl 

 wrote in pencil opposite No. 40, " N. {Rotida yaalnwaringiana) " : 

 but I attach no value to this, for Nevill had little knowledge of 

 the animals. These drawings of Stoliczka are natural size ; the 

 shell in the case of his figure 46 is, I note, 21 mm. in major diameter, 

 whereas the type of B. mainivaringi now before me is 27 mm. and 

 is the shell lately figured by Blanford. The shell-lobes depicted in 

 fig. 46 conclusively show it to be a Macrochlamys, and there can be 

 little doubt it represents the animal of a typical-sized Macrochlamys 

 tugurium. Fig. 22 of Stoliczka's drawings bears the name tugiirmra 

 beneath it in his own handwriting ; the end of the foot is pointed, 

 but, as I have before indicated, it is drawn in such a position that 

 the shell-lobes would not be seen. 



Fig. 21 by Stoliczka is quoted in Nevill's ' Hand-list,' 1878, 



