MOLLUSCA OF INDIA. 



53 



millim. inch. 



" Length 20 0-8. 



Diameter 4^ 0-18. 



Length of aperture 4 0"16. 



" Habitat. Tongoop, Arakan. 



" Var. major, leugth 264 mm. ; diameter 6 ; length of aperture 6. 

 Of another specimen ; length 23 mm. ; diameter 5ij ; length of 

 ajjerturo 5\. 



" Habitat. Pyema Khyoung, Bassein District, Pegu. 



" A much more slender species than A. teimispira, Bens, (a 

 variety of which also abounds in parts of Pegu), though there are 

 signs of a passage. The present appears to replace A. tenuispira 

 in Arakan and I3assein. Mr. Benson, to whom I sent a specimen, 

 observes that it is intermediate between A. tenidspira and 

 A. hastula, Bens." 



No. 239.06.2.2 of the Blanford colled ion is represented by seven 

 examples of this species, with this pencil note by Blanford, "very 

 like tenuispira," from two localities, Tongoop, in Arakan, and 

 Henzada on the Irrawady, the respective locality was not indi- 

 cated ; but they are all alike, two are of the same length as given 

 in the description — viz., 20 mm., white. The largest specimen now 

 figured is 22-25 x 5 mm. 



Fortunately I have from Henry Blanford's Collection (No. 

 20.9.3.15) two specimens from Henzada, one of which I figure ; it is 

 22-0 mm. long x 5 in major diameter, which settles the matter of 

 habitat. They no doubt were given him by his brother. 



Under G.perteuuis, var. major, William Blanford gives the dimen- 

 sions of a larger form from the Bassein District, which is farther to 

 the south. Three examples from this locality are in the Henry Blan- 

 ford collection ; they do not agree with j^O'temiis, the general shape 

 is different, the apex particularly being much blunter. It cannot be 

 therefore considered a variety — I name and figure it as G. bassein- 

 ensis (Plate CLXIV. fig. 10 for apex). 



In Col. Beddome's Collection (No. 682) is a single large speci- 

 men, 26-75 in length x 7 mm., from Thyetmyo, named by him 

 G. baculina; it agrees best with G. nathiana; it has much the 

 general form of pertenuis, but is larger, is ash-coloured, with 

 rough strong striation. A hasty examination recalls so-called 

 tenuispira of Darjiling, but a closer shows quite a difterent increase 

 of the whorls, and that they are by no means so flat. It is also 

 milky white within the aperture, quite a distinguishing character, 

 ■which I note is to be seen also in the typical specimen of G. per- 

 tenuis from Henzada. Nevill records pertenuis from Akouktoung 

 and Thyetmyo. This large form must be the variety of tenuispira 

 referred to by \Vm. Blanford as abounding in parts of Pegu, and in hi.s 

 "Contributions to Indian Malacology," 1865, J. A. S. B. vol. xxxiv. 

 p. 95, he says: "■ Achatina tenuispira, B., of small size, is common 

 at Akouktoung and farther south." 



On the same glass slip in the Blanford Collection (No. 

 238.06.2.2) were gummed five specimens, labelled G. tenuispira, 



