HAUGKBTOtflA. 295 



peristome straight, in one plane, slightly thickened within, 

 columellar margin with a small tooth-like swelling. 



Animal with a short foot behind, the sole not divided, mucous 

 pore large, no overhanging lobe. Eight shell-lobe rudimentary, 

 left wanting, anterior left dorsal lobe distinctly separate from the 

 posterior. Male organ bent on itself, to which bend the retractor 

 muscle is attached, a long tube connecting this bend with the small 

 globose kale-sac ; penis distally to the bend forming a short tube 

 leading to a swollen bulbous portion, to which succeeds a short 

 broad sheath adjoining the genital aperture. Dart-sac or ama- 

 torial organ long and cylindrical ; spermatheca small, pear-shaped, 

 on a stalk. 



Eadula with a broad median row of large teeth, somewhat as in 

 Hemiplecta densa, but with fewer outer laterals : 



21 . 2 . 20 . 1 . 20 . 2 . 21 (43 . 1 . 43) 



Median tooth almost straight-sided, with only an indication of 

 lateral cusps ; inner laterals without inner cusps and with outer 

 cusps slightly developed, outer laterals bicuspid. 



This genus differs from Hemiplecta in the foot not being divided 

 beneath, in the want of shell-lobes, the characters of the male 

 organ, and the much less numerous lateral teeth on the radula. 

 The shell recalls certain Seychelle and Mascarene species (Stylodon 

 unidentata, Erepta stylodori), but the animals do not appear to have 

 been described. 



465. Haughtonia conferta, Pfr. (Helix) P. Z. S. 1856, p. 328; id. 



Man. Hel iv, 1859, p. 183; G odwin- Austen (Rhyssota), ,7. A. S. B. 



1882, 2, p. 70, pi. 5, fig. 6 (animal) ; id. Helix (Rhysota), P. Z. S. 



1895, p. 442; id. Mol. 2nd. ii, 1899, p. 120, pi. 99, figs. 1-8 (ani- 

 mal and anatomy). 

 Helix haughtoni, Bs. A. M. N. H. (3) xi, 1863, p. 87 ; Pfr. Man. 



Hel. v, 1868, p. 92 ; H. 8f T. C. I. 1876, pi. 28, fig. 3 ; Stol. 



J. A. S. B. 1870, p. 87 ; Nevill, Nanina (Rhyssota), Hand-l. i, 



1878, p. 46. 



Rhyssota chamhertinii, Tryon. Am. Jour. Conch, v, 1869, p. 109. 

 pi. 19, fig. 2. 



Shell perforate, subumbilicate, depressedly conoidal, subtur- 

 binate, solid, whitish with a thick yellowish-brown epidermis, 

 sculptured with oblique lines of growth and fine, close, flexuous 

 spiral striae above and below ; spire conoidal, apex obtuse, suture 

 impressed ; whorls 5, slightly convex above, the last natter, angu- 

 late at the periphery, rounded beneath, compressed around the 

 umbilicus ; aperture diagonal, roundly lunate, subquadrangular ; 

 peristome in one plane, obtuse, slightly thickened inside, the 

 columellar margin oblique throughout, thickened and bearing a 

 small tooth in towards the base, briefly reflected above. 



Major diam. 34, min. 29, height 19 mm. 



Hab. South Andaman Island, Mount Harriet, living on the 

 ground. 



