748 OBSERVATIONS ON SOME AUSTRALIAN POLYCII.ETA, 



indistinct joints. There are two paivs of jaws ; the anterior 

 composed of two rows of teeth, of which those of the one set ai'e 

 short and stout with strong denticles, while those of the other are 

 longer and narrower with a row of setiform denticles along one 

 side. The jaws of the posterior pair are smaller ; each consists of 

 a single curved piece. 



The hypoderm is full of rovmded bacilliparous glands. 



This species occurs between tide-marks on the shores of Port 

 Jackson amongst mussels. It has some I'esemblance to ;S. Chiaji 

 of Claparede, (1) but differs in the greater number of joints in the 

 superior antennae and in the form of the " avicular" setee. The 

 Staurocephalus loveni of. Kinberg, (2) which was found in Port 

 •Tackson at a depth of twelve fathoms, differs from the above- 

 described form in having the eyes small, and the second pair of 

 antennae twice as long as the first. 



III. EULALIA. 



EuLALiA (Eumida) quadrocula. N. sp. 

 (Plate LIIL, figs. 6-9.) 



The length of this species is 10^ inches ; the greatest breadth, 

 ^ths of an inch. The colour is green, very dark on the dorsal 

 surface, lighter underneath and on the parapodia. 



The head is small, a little longer than broad, rounded in front. 

 There is a median tentacle about half the length of the head, 

 situated far back between the posterior pair of eyes, and two 

 pairs of lateral tentacles about the same length as the median, 

 placed near the front of the head ; there are two pairs of eyes, 

 the anterior pair situated near the front of the head at the base of 

 the lateral tentacles, the posterior near the posterior border of the 

 head, in both cases about half way between the mesial tentacle and 

 the lateral border. 



The first segment of the body bears one pair of tentacular cirri 

 which are a little more than half the breadth of the body, stout at 

 the base, pointed at the apex ; the second segment bears two pairs 



(1) " Ann. Ch6t. du Golfe de Naples," p. 115. 



(2) Annulata nova, p. 574. 



