ANATOMY OF A COLLECTION OF SLUGS FROM N.W. BORNEO. 303 



distinct. Foot-fringe same colour as the body, with faintly coloured lineoles. Foot- 

 sole brownish-yellow with median and lateral planes. 



Length (in alcohol) 49 millim. 



Shell a thin membranaceous sac, reddish-brown in colour, with very faint lines of 

 growth ; apical portion distinct. 



Hab. — Kuching, N.W. Borneo. 



Generative Organs. — (PL II. figs. 31, 32.) 



The generative organs agree more closely with those of W. gigas than with 

 those of W. ponsonbyi. The vestibule is sac-like, and the vagina long, as in W. 

 ponsonbyi. The penis is folded upon itself at a distance of about one-third from 

 its proximal end ; this and the middle portion form a fairly wide tube, which now 

 gradually tapers until it passes into the vas deferens. At the point where the 

 retractor muscle is inserted (PL II. fig. 31, div.) there is a small diverticulum. The 

 receptaculum seminis is a somewhat ovoid-sbaped sac opening on the right side of 

 the vagina. The free-oviduct is proportionally not so long as in W. gigas, but 

 longer than in W. ponsonbyi. The dart-gland is very similar in shape to that in 

 W. gigas, but the dart-sac contained a dart more like that described for W. ponsonbyi, 

 differing, however, in possessing a more perfectly developed head, with a longer, solid, 

 calcareous tip (PL II. fig. 32). 



5. Wiegmannia, sp. 



A small, bluish-grey form, measuring 14 millim. in length (in alcohol) ; may possibly 

 be a further new species. The mantle border is finely spotted, and posteriorly it rises 

 around the visceral mass, and has a well-developed keel encircling it. I await further 

 material before naming the specimen. 



Hab.—Mt. Penrissen, 2800-3500 feet. 



V. The Genus Collingea, Simr. 



Collingea, Simr. : Zool. Jahrb. (Abth. f. Syst.), 1898, Bd. ii. p. 168. 



In 1895 (3), I described, in conjunction with Lieut. -Col. H. H. Godwin-Austen, a 

 slug-like mollusc from the Poeh Mountains, Sarawak, to which the name Damayantia 

 smithi was given. At that time I had not seen Issel's description (6) and figures of 

 D. dilecta; but Lieut. -Col. Godwin- Austen was of opinion that the specimens from the 

 Poeh Mountains belonged to Issel's genus. Having recently seen a specimen of D. 

 dilecta and compared it with Issel's description and figures, I have no hesitation in at 

 once removing the specimen named D. smithi from that genus. 



Through the kindness of Mr Edgar A. Smith, I have had the opportunity of 

 re-examining this very interesting mollusc, and am now able to give an emended descrip- 

 tion of it and some further particulars respecting its internal structure. 



Unfortunately, a very serious error was made at the time it was originally described. 



VOL. XL. PART II. (NO. 15). 2 Y 



