BY W. A. HASWELL. 97 



Ehlcrs ill 1904 identified specimeiis of a iSyllis received from New Zealand 

 with Schmarda's ^'. cloaterobranchia, the types of which (from S. Africa) he had 

 the opportunity of examining. 



Augener found specimens in the collection from S.W. Australia, and gives 

 some additional particulars. The species thus defined is quite common a little 

 below low-water mark in Port Jackson. The largest specimens measure 4 cm. 

 in length and 1.5 mm. in breadth. 



A simple, pointed seta, obscurely bidentate, is present on the dorsal r-ide of 

 the compound setae in the last nine or ten parapodia, disappearing at the point 

 where the characteristic thick, "pseudoypsiloid," compound setae begin to make 

 their appearance. A very similar simple seta lies on the ventral side in a few 

 of the terminal segments. 



In a male specimen of 147 segments, the segments are filled with sperms from 

 the 120th backwards, but there is no definite indication of a stolon. Another 

 specimen of 95 segments had no sign of gonads. 



Syllis (Typosyllis) gracilis Gravier. (Plate x., fig. 15.) 



Syllis gracilis, Gravier, (16), p. 150, PI. 9, figs. 4-6. 



(?) Syllis longissima, Gravier, I.C., p. 154. 



Syllis (Typosyllis) gracilis, Augener (1), p. 206. 



For further synonymy, see Langerhans (36) and Mcintosh (39) . 



This widely-distributed form, found by Augener in the Hamburg collections 

 froiii South-west Australia, occurs frequently among Algae etc. brought ap from 

 below low-water mark in Port Jackson. 



Dorsal simple setae, pointed and obscurely bidentate like the corresponding 

 .=ietae in /S*. closterobranchia, occur on a few of the last segments. The acicula 

 (Plate X., fig. 15) are peculiar, each having a slight rounded terminal enlarge- 

 ment from which a peg-like process projects obliquely. 



Syllis (Typosyllis) parturiexs, n.sp. (Plate xi., figs. 17, 18.) 



This small Syllis, of which I have only obtained a single specimen, differs 

 from all the other members of the group, with the exception of S. vivipara, in 

 being viviparous. 



It is only 4-5 mm. in lengfh, and colourless but for a mottling of bluish green 

 in the epithelium of the middle part of the intestine. There are 32 segments. 

 The prostomium is slightly broader than long, and bears four very small eyes 

 in addition to a minute frontal pair. The palpi are about equal in length to 

 the prostomium; they are sub-conical, divergent from near the base, where they 

 are in contact for a short distance. The median prostomial tentacle is about six 

 times the length of the prostomium, and lias about 35 segments; the lateral about 

 four times. The dorsal peristomial tentacle is much longer than the ventral, 

 nearly as long as the median prostomial. All the tentacles, with the dorsal cirri, 

 are very distinctly segmented. The parapodia are not deeply divided. Each 

 bears about 10 compound setae with bidentate falces. In a few of the last seg- 

 ments there is a single simple seta on the dorsal side of each parapodium. There 

 is a single aciculum which is slightly enlarged and slightly oblique at the end. 



The dorsal cirri are alternately longer and shorter, the longer containing 

 about 35 segments, and their length much exceeding the breadth of the body. 

 The ventral cirri are slender, and scarcely extend as far as the extremity of the 

 parapodia. The anal cirri resemble the longer dorsal. 



