436 



REPORT OX THE SLITGS. 



IV. SPECIES FROM NEW BRITAIN. 



1, Aneitella berghi, (PI. XLI. Figs. 24—27). 



Hab. Karavia, Gazelle Peninsula. Numerous. 



This species was first described by Plate' in 1898, who gives numerous figures 

 of the internal structure, but the external features are scarcely done justice to. Seeing 

 how very imperfectly figured most of the Janellidae are, a fact I have previously 

 drawn attention to", I have given two figures of the external form (PI. XLI. Figs. 

 24—2.5). 



The specimens investigated by Plate were from Stephen's Island, New Zealand. 



All the specimens I have dissected show a little variation in the form of the 

 generative organs from those figured by Plate (I. c, Taf. 16, Fig. 55). In one specimen 

 the penis exhibited a well-marked fold, as figured (PI. XLI. Fig. 27). 



The dimensions of the largest specimen are : — 



Length over back, from head to extreme posterior 48'5 mm. 



Length of foot-sole 45 mm. 



Width over back 24 mm. 



Breadth of foot-sole 7 mm. 



Distance of anus from right tentacle 9"5 mm. 



„ „ „ respiratory orifice 2 mm. 



Length of mantle 9 mm. 



With the typical examples were two well-marked colour variations, which are 

 described below. 



Var. nov. albida. 



Hab. Karavia, New Britain, two specimens. 



W^hole of body a pure white. Length (in alcohol) 46 mm. 



Var. nov. fuscopallescens. 



Hab. Karavia, New Britain. 



Whole of animal a pale brownish-yellow, with little, if any, black mottling. 

 Length (in alcohol) 38 mm. 



1 T. c, p. 197. 



Proc. Zool. Soc, 1894, p. 530. 



