1922.] 



Fauna of the Chilka Lake : Observations in Rambha Bay. 



701 



the eye to the posterior extremity. Each band of cerata consisted approximately of 

 three or four rows, but the arrangement was irregular. As a rule the longest cerata 

 were those of the innermost row. Some very small cerata, broader in proportion 

 than others, were situated in the anterior third of each band. The central region of 



Fig. 1. — Photographs of the ventral and dorsal views 



of the type-specimen of Stiliger pica 



Annandale & Prashad (magnified). 



the notum was bare and the anus opened on this region in the anterior third of the 

 body. The sides were vertical and a little concave. The male pore lay below and 

 a short distance behind the right tentacle, the female pore immediately behind 

 it. 



The penis was observed extruded in the living specimen. It was a slender organ 

 about as long as one of the rhinophores and termina- 

 ting in a slightly asymmetrical cup-shaped structure. 

 The stylet was not observed in the living animal. 



In life the back and sides were dull olive-green tinged 

 with black between the rhinophores and obscurely ver- 

 miculated on the antero-lateral regions. There was a 

 small pale spot round the anus. The sole of the foot 

 was white, clouded with olive-green. The tip of the 

 snout, rhinophores and a broad stripe extending back- 

 wards from their bases on either side to a point a little 

 behind the eye, which was included, were translucent 

 white with minute specks. The cerata were sooty black, 

 obscurely speckled with grey, and had conspicuous 

 white tips. 



The animal was killed with boiling formalin (5 % sol.) 

 and has retained the form and colouration described, 

 except that the foot and head are slightly contracted 

 and the latter somewhat depressed. 



With a single minute specimen in our hands we have not been able to make out 

 details of the internal anatomy. The genital system in general agrees with Bergh's 



Fig. 2. — A ceras showing the 



arrangement of the hepatic 



diverticulum. 



