the Cyclostomacea of Eastern Asia. 459 
‘ a expatriatus, W. Blanf. Nilgiri and Shevroy Hills, South 
ndia. 
A. Footei, W. Blanf. Kolamully Hills, South India. 
A. Theobaldi, W. Blanf. Khasi Hills. 
A. Ave, W. Blanf. Ava. 
A, stylifer, Bens. Darjiling. 
A. spiracillum, A. Adams & Reeve. Borneo and Japan ! 
4. 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. RapHavuus, Pfr. 
In a previous paper (Ann. & Mag. Nat. Hist. for July 1863, 
vol. xii. p. 55) I have described the peculiar structure of the 
animal in R. chrysallis, 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 Pupinine. 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. Srreptavutus, Bens. 
This genus appears to represent, in the Himalayas of Sikkim, 
the Raphauli and Pupine 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 Alyceus, 
on account of the characters of the sutural tube. In this view 
of its affinities I cannot coincide. The tube in Séreptaulus, 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 
hable to decay. The ccurse 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 Alyceus, 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. apo Pfr.) 
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