96 AUSTRALIAN SYLLIDAE, KUSYLLIDAE AND AUTOLYTIDAE^ 



the setae distinctly iinidentate, and tlius aijpoars to differ in a definite way from 

 2". truncata. 



Syllis (Ttposyllis) punctulata, u.sp. (Plate xi., figs. 1-lG.) 



The length of this very well-marked species is about 1 cm. and the breadth 

 .75 mm. There are about 70 segments in all. The prevailing colour of the 

 dorsal surface is dark red, usually lighter behind, with innumerable minute colour- 

 less dots marking the position of integumentary glands. The prostomium and 

 peristomium are much lighter than the body, of a bright orange, the prostomium 

 with an irregular pattern of a darker colour concentrated in front in the position 

 in which frontal eyes usually occur. Vibratile cilia occur on the sides of the 

 segments between the parapodia. 



The prostomium (Plate xi., tig. 1) is broader than long; the presence of 

 frontal eyes is inconstant : the ordinary eyes are rather small, the posterior neaier 

 together than the anterior. The palpi are divergent from the base, slightly nar- 

 rowed distally, longer than the prostomium. The median tentacle is more than 

 twice the length of the prostomium, of about 20 to 30 segments; the lateral ten- 

 tacles are twice the length of the prostomium, of about 12 to 20 segments. Of 

 the peristomial tentacles the dorsal, which is slightly the longer, is of about the 

 same length as the median. All the tentacles are very distinctly segmented, as 

 are also the dorsal and anal cirri. 



The parapodia (Plate xi., fig 2) are not deeply divided. There are 10-12 

 compound setae (figs. 3 and 4), all of one type, with bidentate falces, which are 

 slightly longer in proportion in the more anterior segments. There are two 

 simple setae in all the posterior parapodia. One of these (figs. 5 to 10) is 

 dorsai to the compound setae : it first appears about the twenty-eighth segment 

 and continues to the posterior end; it is obscurely bidentate; the other (fig. 11) 

 which occurs only on the last few segments, is ventral to the compound setae and 

 is very strongly bidentate, its extremity closely corresponding to the end of the 

 appendage of one of the compound setae. The acicula (figs. 12-16). of which 

 there are three or four in each parapodium, vary a little in shape, but one (the 

 most anterior, (figs. 12 and 13) is always strongly bent forwards at the end, and 

 another (fig. 16) symmetricallj- pointed. 



The dorsal cirri are very distinctly articulated. The first are the longest, as 

 long as the median tentacles, with about 25 to 35 segments. The remainder are 

 shorter than the breadth of the segments and contain 18 to 35 segments: there is 

 no regular alternation. The ventral cirri are short, not extending beyond the 

 ends of the parapodia. The anal cirri are of about the same length as the aver- 

 age dorsal. The pharyngeal tooth is not quite anterior. The pharynx extends 

 to the 7th segment; the proventriculus lies in the 8th to the 13th. 



One specimen has a buff-colouri'd female stolon; the ova extend forwards 

 several seguicnts in front of the head of the stolon. 



S. piiiictulnta occurs about the liases of Algae growing on rocks about low- 

 water mai-k in Port .Jackson and P.o(nny Pay. 



SVI.I.IS (TVPOSVLLIS) Ci.OSTEROBRAXC'lIIA Schuiiivda. 



Syllis closlerohranchla, Sclnnarda. (40). 2 Tlieil, p. 72. 



Siillis clnsterobraiichia, Ehlers (10), I., p. 19. Taf. iii., fig. 1-4. 



St/llis (Ti/po.'iiillis) dosterohranchiii, Augener. (1). ii. 201. Text-fig. 23. 



(For some additional synonyms, see Augener.) 



