308 MR WALTER E. COLLINGE ON THE 



niilliin. from the right lower tentacle, and 8 '5 millim. from the posterior end of the 

 body. 



Hab. — Kuching, N.W. Borneo. 



I have pleasure in associating with this handsome species the name of Mr 

 Shelford of the Sarawak Museum. 



2. Veronicella exima, n. sp. 

 PI. I. figs. 18, 19. 



Animal yellowish-brown dorsally, densely and minutely speckled with black, 

 leaving a clear unicolourous margin and broad medio-dorsal line. Hyponotum 

 yellowish-brown ; foot-sole brown. 



Length (in alcohol) 22 '5 millim.; foot-sole 2 millim. broad; hyponotum 3 '5 

 millim. broad. Female generative orifice on the right side, 3 millim. from the foot- 

 sole, 12*5 millim. from the right lower tentacle, and 12 millim. from the posterior 

 end of the body. 



Hab. — Kuching, N.W. Borneo. 



VIII. The Genus Onchidium, Buchan. (em. Plate). 



1. Onchidium ponsonbyi, n. sp. 

 PI. I. figs. 20, 21. 



Animal dirty green dorsally with large, irregularly distributed black spots. 

 Hyponotum dark greenish-blue ; foot-sole dirty yellow. 



Length (in alcohol) 30 millim.; hyponotum 10 millim. ; foot-sole 8 millim. 



Hab.— Mt. Penrissen (2800-3500 feet). 



It gives me much pleasure to associate with this very fine species the name of 

 Mr Ponsonby. 



IX. Summary and Conclusion. 



From an examination of the foregoing specimens it is, as yet, difficult to 

 generalise as to their affinities or relationships with allied genera, for our knowledge 

 of their structure and specific variation is too fragmentary. Further, it is of little 

 use comparing the form and structure of the generative organs of such genera 

 as Wiegmannia and Isselentia with Parmarion, Microparmarion, etc., for our 

 knowledge of the structure of these latter genera is not much more complete. I 

 sincerely hope, however, that with the invaluable aid of Mr Shelford and other 

 naturalists, I shall be able, before long, to treat of the general anatomy of many of 

 the Bornean slugs in much greater detail. The present communication must be 

 regarded more in the light of a preliminary notice of species, which, as further 

 material is obtained, will receive more exhaustive treatment. 



