30 laxd and freshwater 



Glessula oakesi, G.-A. 



Records of [he ludian Museum, vol. viii. pt. xii. No. 49, p. 617, 

 figs. 8 A, B, C, D. 



Locality. Abor Hills {Captain G. F. T. Oales, R.E.) No. 3G00 

 B.M. Type. (Plate CLX. fig. 15 x 1-56.) 



Orhiinal Description : — " Shell oblong turrcted, shining surface ; 

 sculpture: regular somewhat distant incised lines; colour ochra- 

 ceous one umber brown ; spire high, sides very flatly convex ; suture 

 impressed; whorls 7, flatly convex, proportion of body whorl 

 to length 100: 2-5; aperture rather narrowly oval, peristome 

 outer lip thickened ; columellar margin slightly convex." 



"Size: maj. diara. 7'0 ; alt. axis lO'o mni." 



"Two specimens of this species, though rather smaller in size 

 and not full}- grown, were sent to me from Brahmakund by Mr. 

 M. Ogle, No. 3578 B.Jf. coll. The largest measures 11 x 5 mm. 

 The species was received alive in 1913, from Captain Oakes with 

 other species and dissected." No doubt the iirst Ghssula so 

 received in this country ; a few lived for some months until the 

 winter set in, feeding on lettuce, etc. 



"Animal of Ghssula oakesi from llotuiig (Oakes). The sole of 

 the foot is crossed by coarse ridges, there is a very distinct 

 peripodial margian (text-fig. 3 A). The genitalia (figs. 8 B, 0, I)) 

 was fairly well seen in one specimen, but more material was sadly 

 wanted. The hermaphrodite duct is conspicuous from its size and 

 close convolution, bound closely together at its junction with the 

 albumen glai]d. The penis is very short with a short stout flagel- 

 lum terminating in three blunt knots ; it thus dift'ers from what 

 1 have been able to see in other species. The vas deferens is 

 given off from near the head of the penis, the spcrmatheca was not 

 seen." 



" This species (G. oahcsi) is the same as the one recorded from 

 Rotung as G. botelhis, Bs., of Southern India by 3Ir. H. B. Preston 

 in the ' Records of the Indian Museum,' vol. viii., Nov. 1915, 

 p. 539; it is a bare record, in any case remarkable as regards 

 range. As I had not noticed this South Indian species among the 

 large series sent me from the Abor Hills, I was anxious to see the 

 shells which had gone to Calcutta. Dr. Annandale very kindly 

 sent these to me (October, 1916), and I have compared them with 

 specimens of Glessula botelhis in the Henry Blanford collection 

 from the Nilgiris, with the result that I cannot conliim Mr. Pres- 

 ton's determination. This Abor Glessula (oal-esi) is decidedly 

 smaller than G. hotellus, and not so tumid, the whorls are closer 

 wound, the outer lip is much more thickened than in bvtdlus, tho 

 Lirger shell. I have compared the embryonic whorls and made 

 enlarged drawings of hotellus, Nilgiris (PI. CXLIII. fig. 1), of 

 Mr. Preston's specimen (PL CXLIII. fig. 3), and of the type 

 specimen of oakesi (PL CXLIII. fig. 2) ; the dift'erence between 

 the first and the two last is very marked, it is unmistakable." 



