230 Transactions. — Zoology. 



tint, and no pale mid-ventral band. The same specimen in 

 spirit has the dorsal surface dark-grey, fading at the margins, 

 and flecked with small white specks all over, but more abund- 

 antly towards the margins, where the relative proportions of 

 grey and white become gradually reversed. The ventral sur- 

 face (in spirit) is dirty-white finely mottled with grey. The 

 body (in spirit) measures about 37 mm. by 4 mm., with the 

 genital aperture 10 mm. and the peripharyngeal aperture 

 15'5 mm. from the posterior extremity. The margins of the 

 body are sharper than in var. castanea, and tend to form nar- 

 row ridges, marked by a light line ; the body tapers gradually 

 to both ends, but is rather narrower in front than behind. 



Geoplana graffii, var. otiraensis, Dendy. 



Near Jackson's (West Coast Boad). — February-March r 

 1898. A considerable number of large specimens were met 

 with in this locality, under logs on the Teremakau Flat. 

 Fifteen specimens were preserved, and these agree so closely 

 wdth one another and differ so much from the typical 

 G. graffii that it may become necessary to consider them 

 as belonging to a distinct species. The original specimens 

 from Otira were hardly so characteristic as those now under 

 consideration, one of wmich latter may be described from life 

 as follows: "When at rest very broad and flat; when 

 crawling flat below, strongly convex above, tapering very 

 gradually in front and behind. Dorsal surface in life dark- 

 brown, with a narrow median darker line; finely and abund- 

 antly speckled (except in the median line) with iridescent 

 green, more sparingly speckled (all over) with much larger 

 longitudinal dashes of opaque white. Ventral surface very 

 pale-brown, abundantly mottled with dark purplish-brown, the 

 mottling rather less abundant in the middle line." 



Spirit specimens average about 60 mm. in length by 

 7 mm. in breadth, with the genital aperture about 19 mm. 

 and the peripharyngeal aperture about 28 mm. from the 

 posterior extremity. The dorsal surface is dark-brown or 

 grey, intensified to nearly black in a narrow median stripe 

 which may become obsolete, and flecked with various-sized 

 specks and dashes of white which may or may not be 

 especially developed about the middle line. The ventral 

 surface is pale-brown, closely mottled with small purplish 

 specks, with narrow pale marginal and median bands where 

 the purplish specks are more or less wanting. 



Geoplana graffii, var. nigrescens, nov. var. 



This variety differs from var. otiraensis in the total sup- 

 pression of the white specks on the dorsal surface. The fol- 

 lowing description was taken from a living specimen found 



