556 Records of the Indian MuseunK [Voi,. VIII, 



The radula (pi. xlvii, fig. i^) is quite typical of the genus, the 

 number of teeth in the row being exceedingly numerous, over 600. 

 There is a slight departure in the centre tooth and the three 

 admedians, they are larger than usual, on broader plates, well 

 formed and pointed and the third showing signs of a cusp on the 

 outer margin. The teeth that follow are all alike, evenly bicuspid, 

 much curved, on narrow plates, becoming very small on the mar- 

 gin. These teeth are a departure again from the usual serrated 

 teeth of typical D. Icvicula of Tenasserim. 



The jaw was broken, but sufficient of it was seen to show it 

 was straight in front. 



Subgenus Minyongai/ nov. 



vShell quite rudimentary, situated on the anterior border of 

 the mantle above the respiratory orifice, completely hidden by 

 the mantle, minute, discoid The foot long and narrow. The 

 visceral sac rests in a deep V'Shaped depression on the keel of the 

 foot, distinctly different to its position in Austenia and Girasia, 

 where it rests in a cavity of the foot itself. Mucous gland small, 

 with a short overhanging lobe. Generative organs simple, vas 

 deferens very short, as also the spermatheca. No amatorial organ. 



Minyongia: kcmpi, n. sp. 



(Plate xlvii, figs. 2 — 2g). 



No. 5988 is thus described by Mr. S. Kemp.— " Slug B", 

 3i-xii-ii. "Common behind leaf-stems of plantain. When dis- 

 turbed this species twists, turns and wriggles in a state of frantic 

 excitement. General colour dull straw yellow. Anteriorly, be- 

 hind the tentacles, are three very obscure median and sub-dorsal 

 grey stripes. Posterior parts with whitish granulations and darker 

 interspaces. Sole almost white with a pale yellow margin." 



Locality. — Rotung, No. 5919; Kobo, one specimen. No. 5867 

 (S. W. Kemp). 



The shell is reduced to a very small oval thin disk, opaque 

 white, granulate in structure. 



It is situated on the anterior side of the mantle, just in front 

 of the respiratory orifice (fig. 2^), quite internal and covering the 

 heart, kidney and the branchial sac. 



Size : major diameter 2"8 mm., minor diam. 175 mm. 



The animal (pi xlvii, fig. 2) is pale coloured with a grey streak 

 on the neck. It has a narrow foot, divided, and from the look of 

 the spirit specimens it reaches a considerable length when extended, 

 probably to about 55 mm. The extremity of the foot (fig, 2a) is 

 pointed with a very minute indistinct mucus pore. The peripodial 

 margin has a narrow fringe with the usual two parallel grooves 

 above (fig. 2c). The foot is slightly keeled above, dividing into a 



' The name is derived from the Tribe of Minyongs, who inhabit the mountain 

 country adjacent and west of the Abors. 



