the Cyclo^iomAcea of Eastern Aiia, 459 



A. expatriatus, W. Blanf. Nilgiri and Shevroy Hills, South 

 India. 



A. Footei, W. Blanf. Kolamully Hills, South India. 

 A. Theobaldi, W. Blanf. Khasi Hills. 

 A. Ava, W. Blanf. Ava. 

 A. stylifer, Bens. Darjiling. 



A. spiracillum, A. Adams & Reeve. Borneo and Japan ! 

 b. Ridge recurved ; shell depressed, turbinate. 

 A. hebes, Bens. Khasi Hills. 

 A. gemmula, Bens. Darjiling. 

 A. nitidus, W. Blanf. Arakan. 



It will be noticed that many of these sections are restricted in 

 their geographical distribution. 



16. Raphaulus, Pfr. 

 In a previous paper (Ann. & Mag. Nat. Hist, for July 1863, 

 vol. xii. p. 55) I have described the pecuUar structure of the 

 animal in R. chrtjsaUis, Pfr., the only Burmese species of this 

 genus. The other two known species are from Penang and 

 Borneo. The shell is remarkable as forming a link between the 

 various genera of Pupinince. It possesses the general form of 

 Pupina and Registoma, and the tube is the homologue of the 

 incisions in the peristome of those species ; at the same time, it 

 resembles Hybocystis in the ventral flattening of the last whorl, 

 and Megalomastoma and Cataulus in its sculpture. 



17. Streptaulus, Bens. 

 This genus appears to represent, in the Himalayas of Sikkim, 

 the Raphauli and Pupina of Burma, Malacca, and Borneo. It 

 was described by Mr. Benson (Ann. & Mag. Nat. Hist, for 1857, 

 vol. xix. p. 201) as intermediate between Raphaulus and Alycaus, 

 on account of the characters of the sutural tube. In this view 

 of its affinities I cannot coincide. The tube in Streptaulus, as 

 in Raphaulus, opens inside the body-whorl, at the suture, a few 

 millimetres within the peristome. Thence it runs internally, 

 also as in Raphaulus, forwards to the aperture ; and in the normal 

 variety it passes out through the top of the lip, and runs back- 

 wards for a short distance along the suture, being open at the 

 extremity ; the external portion is somewhat irregular, thin, and 

 liable to decay. The course is precisely similar to that in R. 

 chrysallis, except that the tube, after emerging from the body- 

 whorl, runs backwards instead of upwards. It is quite distinct 

 from the course in Alyccms, in which the tube is never internal, 

 and is, moreover, closed externally. But this is not all : in two 

 species of Raphaulus {R. bombycinus, Pfr., and R. Lorraini, Pfr.) 



30* 



