2 86 



DISCOVERY REPORTS 



variation in number of branches and in the size of the animal can be gauged from the 

 following : 



The anatomy of this species has been worked out very thoroughly by Burger, 1907 

 (1912), and Brinkmann 1917. Fig. 63 B shows the position of the testes and gives an 



Fig. 63. Pelagonemertes rollestoni, Moseley. Outline sketches of entire animals. A, female, from a 

 colour sketch of a living animal; B, male, from a spirit specimen, ov, ovaries; t, testes, x 2. 



idea, when compared with Fig. 63 A, of the degree of enlargement of the gut branches 

 after fixation. The number of nerves in the proboscis was twenty-two in two of my 

 specimens, but they are difficult to count because of the irregular thickening of the nerve 



