ALYC.EUS. 275 



409. Alycseus woodthorpei, Godwin- Austen. 



Ali/cceus woodthorpei, Godwin-Austen, Land & Fresliw. Moll, 

 iudi:i, ii, 1914, p. 414, pi. 155, fig. 14. 



Original descnption : — " Shell openl\^ umbilicated, globosely 

 conoid ; sculpture : oblique, sinuate costulation on upper whorls, 

 rather strong and distant as it approaches the end of the sutural 

 tube, it then becomes A'er}' fine and very close up to the constric- 

 tion ; colour pale sienna-brown; spire moderately high, apex 

 small ; suture well impressed ; whorls 4, the constriction near the 

 base of the sutural tube, thus enlarging into a narrow costulated 

 ridge which is close behind the peristome ; aperture oval, obtusely 

 angulate above; peristome simple, double, thick; columellar 

 margin curving vertically. 



" Major diam. 4*3; alt. axis 2 mm." 



Hah. Burma : Tort Stedman ( Woodthorpe). 



" The most distinguishing character of this shell is the extremely 

 fine close regular costulation next the sutural tube, which, in most 

 species of the genus, is strong and well defined ; this character is 

 met with again in species of the Abor Hills, such as A. aborensis, 

 etc. This in conjunction with the fact that so large a proportion 

 of the species in other genera inhabiting the Abor country are 

 not found in AVestern Assam, is an indication of topographical 

 connection between the JShan area and the Tsanspu drainage-system 

 far buck in geological time, closer, more direct, and unrestricted 

 than now exists. There are grounds for thinking that the high 

 snowy range at the head of the Irrawaddy, together with the well 

 defined orographical feature the Assam Range to the west, may be 

 a comparatively recent elevation compared to the main mass of the 

 Eastern Himalayas." (Godwin-Auste)i,) 



Subgenus CYCLORYX, Godivin- Austen. 



Cyclon/x, Godwin-Austen, Land & Fieshw. Moll. India, ii, 1914, 

 p. 334. 



Ti'PE, Ahjcdius constrictus, Benson. 



Itanc/e. India. 



"Shell perforate, ovately conoid, sculpture generally consisting 

 of distant, fine, regular costulation on the upper whorls, stronger 

 and closer on the short inflated portion of the last. Sutural tube 

 extremely short, or as often clubbed or pear-shaped.'"' 



410. Alycseits bembex, Benson. 



Ali/creus bembex, Benson, A. .A[. N. H. ser. 3, iii, 1859, p. 178; 

 Blanford, A. M. N. H. ser. 3, xiii, 1864, p. 458 ; Pfeiffer, Mon. 

 Pneiim. Siippl. 2. 1865, p. 46 ; Ilanley & Theobald, Conch. Ind. 

 1874, pi. 95, figs.' 2, 3 : Theobald, Cat. Shells Brit. India, 1876, 

 p. 39 ; Sowerbv, in Reeve, Couch. Icon, xx, Alycceus, 1877, 

 pi. 5, fig. 42 ; Nevill, Hand List, i, 1878, p. 294. 



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