288 LAND AND FRESHWATER 



long tube, with a swollen portion and a sharp band, held together 

 by muscular tissue. At the head is a short ccecum-like process to 

 which the retractor muscle is attached ; the epiphallus (ejJ-) is 

 short, so is the kale-sac (A-). The amatorial organ (fig. 2 d) is 

 large and cylindrical, the distal end was so tightly embedded in 

 the albumen gland, that I could not separate the two, due to con- 

 traction and hardening in the alcohol. 



The spermatheca is very long (fig. 2 b) and was folded on 

 itself, its walls were quite thick and strong. The folding was due 

 to the presence of a single perfect spermatophore (fig. 2 c), very 

 beautiful in form, an elongate capsule, not so long as in A. yigns, 

 also with a shorter flume, with strong bifid spines at base of the 

 capsule and finer longer ones at base of the flume. Total length 

 20 mm., of which the capsule is 7'5 mm. 



Adjacent to where the prostate merges into the vas deferens 

 (fig. 2 6) there are a pair of sacculate bodies (s), apparently the 

 oviduct terminating in this way. 



The radula is precisely the same as in A. gigas, even to the 

 formula, which is 



50 . 3 . 22 . 1 . 22 . 3 . 50 



or 75 . 1 . 75. 



The only difference is in the marginal teeth, but the radula was 

 not quite perfect along the Avhole side. The jaw has a central 

 ])rojection. For radula of A. gigas see Vol. I. p. 232 and 

 Plate LXII. fig. 8. 



AiJSTENiA ANNANDALEi, n. sp. (Plate CXXYIII. figs. 15, 15 a ; 

 Plate CXXX. figs. 1-1 d.) 



Loccdity. Siliguri, North Bengal (iV. Annandcde). 



Shell rudimentary, flatly spatulate, membranaceous, thin ; sculp- 

 ture none ; colour pale ochraceous near apex, merging into dark 

 brown on the margin, within dull white with dark margin; spire 

 quite flat, the apex is somewhat more shelly, but was not perfect ; 

 whorls only one, hardly any coil. 



Size : maj. diam. 22"0, min. 13'0 ; lengfh of animal 48 mm. 



Only a single specimen was found, the animal of which had 

 hardened very much in the spirit, so that in the drawing 

 (PI. CXXX, fig. 1) the mantle appears very much contracted, but 

 there is an indication that even in life a larger surface of shell 

 would be exposed than is seen in Girasia hoolerl, and other Assam 

 species of that genus. 



The shell is not quite so rudimentary as in the above type 

 species and is broader in proportion to the length, in fact 

 approaching more to the form of the shell in Austenia gigas ; there 

 is also a decided terminal point and coil of the visceral sac which 

 is lost in Girasia hookeri. It is an interesting and a linking 

 species in this series of slug-like molluscs. 



The colour in alcohol is very black, particularly on the foot and 

 dorsal lobes, the combined shell-lobes are much paler, but the head 



