302 



ynx. CYRIL C'ROSSLAND OX THE 



[Fe]). IG, 



gills vaiies between 24 in small examples and 110 in larger. 

 Though large, these gills do not normally cover the back, a con- 

 siderable bare space remaining in the middle except in two cases, 

 one from the Maldives and one from East Africa, where those of 

 either side mingle in the mid-dorsal line. The maximum number 

 of filaments varies between 6 in small to 17 in the largei', though 

 the single, very small specimen from Kokotoni has but three. 

 Posterioi-ly we find a very variable number of small and even 

 quite rudimentary gills composed of from three to one filament, 

 there being 12 or 15 in small specimens and about 50 in others, 

 their number again varying roughly with the size of the specimen. 

 See the figure of the whole worm (PI. XX. fig. 6). 



Text-fi<r. 51. 



Setfe of JS. coccinea. 

 a, b,f, X 350 ; c, d, e, X 70. 



a & h. Comfiound setse from 10th and 50th feet respectively'. 



c. Aciculum (one of three) from 10th foot. 



d. The single aciculum from the oOth foot. 



e. Acicular hooked seta from the same foot. 



f. A comb seta (the teeth are less distinct in natnre than in this figure). 



The setae are of the same type as those of ^. afra described 

 above, viz. bent capillaries, triangular ending combs witli very 

 fine teeth, and hooked compound .'^eta\ Of these latter, specimens 



