744 OBSERVATIONS ON SOME AUSTRALIAN POLYCII.ETA, 



Chloraevia. In most species of Syllis these bodies are found only 

 in the posterioi' regions of the intestine, in which position they 

 were noticed by Claparfede, in the case of S. gracilis. 



All the three specimens which I have seen were females full of ova. 

 The ovaries are situated laterally near the bases of the parapodia. 



Syllis nigropunctata. I^. sp. 

 Plate LII., figs. 1-3. 

 The length is ^^^ ths of an inch ; the greatest breadth about .Jo th 

 of an inch. The ground colour is dull yellow ; the dorsal surface 

 of the segments is finely mottled with grey, which leaves on each 

 segment two rounded spots of the ground colour, sometimes with 

 a dark dot in the centre of each ; at the sides of the segments are 

 two and three black spots : towards the posterior extremity of the 

 body these markings become much less conspicuous. The body is 

 dorso-ventrally compressed. The number of segments is from 95 

 to 125. The head is rather broader than long, trilobed, the 

 lateral lobes being very obscure, while the median one is large and 

 rounded. The palpi are nearly twice as long as broad, rounded, 

 ■widely divergent in the distal three-fourths, but closely approxi- 

 mated at the base. The median tentacle is about four times the 

 length of the head, cylindrical, regularly ringed, with 22-25 

 joints inserted between the posterior pair of eyes, close to the 

 posterior border of the head ; the lateral tentacles are shorter than 

 the median one, with 20 joints. The anterior pair of eyes are 

 directed forwards upwards and outwards ; they are sitiiated a little 

 behind the base of the lateral prsestomial tentacles, and are of 

 reniform outline ; the posterior pair of eyes are situated behind 

 and internal to the anterior pair, they are considerably smaller 

 than the latter and are of circular form. The second segment is 

 rather broader than the third. Its tentacles (peristomial tentacles) 

 are two in number on each side, and much shorter than the 

 tentacles of the head. The segments become broader from the 

 anterior end of the body to the fifteenth segment and then very 

 gradually become narrower towards the tail. The lateral borders 

 of the segments are very strongly convex. 



