186 Transactions. — Zoology. 



ing, strongly convex on the dorsal, and flat on the ventral sur- 

 face, tapering gradually at both ends ; about 35mm. long and 

 3- 5mm. broad. Eyes rather few and small. 



Colour of dorsal surface warm reddish -brown, almost 

 chestnut, thickly mottled with small irregular specks of bluish - 

 white. Towards the margins these specks become more 

 abundant and confluent, so as to form the ground-colour, 

 while the reddish-brown is reduced in proportion. 



Anterior tip reddish-brown. Ventral surface white, thickly 

 speckled with minute specks of reddish-brown. On each mar- 

 gin there is a narrow band of white almost free from speckles. 



In spirit the dorsal surface is convex and the ventral con- 

 cave with prominent narrow margins. The body is much 

 broader behind than in front. The peripharyngeal aperture 

 is far back, at about the junction of the middle and posterior 

 thirds. The genital aperture was not made out. 



Locality. — Wadestown, near Wellington, under a stone, 

 in the bush (coll., R. M. Laing, Esq.). 



Geoplana hamiltoni, n. sp. 



When crawling, flat on the ventral surface ; strongly 

 convex, or sometimes triangular, on the dorsal; tapering 

 gradually in front and behind ; length, about 31mm. ; breadth, 

 3mm. Eyes as usual. 



Ground-colour of dorsal surface nearly white, finely 

 streaked and marbled with chestnut-brown, and with a narrow 

 but very distinct median stripe of darker brown. The fine 

 brown streaks become concentrated towards the middle line, 

 and on each side of the dark median stripe there is also a fine 

 dusting of very minute, iridescent greenish specks. 



Anterior tip reddish-brown. The ventral surface is paler, 

 the ground-colour nearly white, finely marbled with rich 

 chestnut-brown. The brown specks show a tendency to 

 accumulate in an ill-defined mid-ventral stripe. 



In spirit the body is short and thick, with narrow anterior 

 tip. It is strongly convex on the dorsal surface, and very 

 slightly convex on the ventral. The margins are without 

 distinct " ambulacral line" further than the usual white 

 ridges at the anterior extremity, and there are no special 

 lateral surfaces. The peripharyngeal aperture is a very little 

 behind the middle, and the genital aperture about half-way 

 between it and the posterior end. 



Locality. — Near Napier, Hawke's Bay (coll., A. Hamilton, 

 Esq.). 



Geoplana gelatinosa, n. sp. 



The single specimen when at rest was very broad, flat, 

 and extremely thin, with crinkled edges, and very abruptly 



