BV w. A. haswf:ll. 101 



I have only obtained in Poii Jackson two or three small specimens of this 

 very Avidely-distributed species . 



Sub-tfcuus Eh l e u s i a Lancjerhans. 

 Syllis (Ehlkhsia) ferrugixea Langerhans. (Plate xii., figs. 3-10. ) 



Ehlersia ferruginea, Langerhans, (35), p. 104, fig. 10. 



SylUs (Ehlersia) ferruginea, Augener, (1), p. 211, Text-tig. 2(J. 



The two sijecimens from Port Jackson which I refer to this species were not 

 seen alive; in the preserved condition they have a dull yellowish-grey colour. Their 

 length is about 8 mm., and each contains some ninety to a hundred very short 

 segments the leng-th being less than a tenth of the breadth. 



The prostomium (Plate xii., tig. 3) bears six pairs of eyes — the frontal mere 

 dots of pigment, the others also very small. The palpi are sub-triangular when 

 viewed from above; behind thej' bulge out beyond the lateral edge of the pros- 

 tomium. The median tentacle is over four times the length of the prostomium 

 and is made up of about forty-five articuli ; the lateral are three-fourths of the 

 length of the median. Of the peristomial, the dorsal, as usual the longer, is a 

 little longer than the lateral prostomial. The parapodia are not deeply divided. 

 In the anterior region there are in each parapodium dorsally three or four com- 

 pound setae (fig. 4) of the Ehlersia type with long and slender falces, feebly 

 bidentate: ventrally the rest of the compound setae (figs. 5-7), about ten in num- 

 ber, have relatively short bidentate falces with the secondary tooth more strongly 

 developed than the terminal. Posteriorly the setae of the latter type become 

 gradually replaced by setae (fig. 7) with very short, strongly curved falces with 

 the secondary tooth much larger than the terminal. In the posterior segments 

 there is a simple seta with a rounded extremity dorsal to the compound setae in 

 each parapodium . In the last two or three segTiients there is alfio a ventral simple 

 seta (fig. 8) in each parapodium, similar to the adjoining compound setae, but 

 without the joint. There arc usually two acicula (figs. 9 and 10), slightly 

 knobbed and bent forwards at the end, in each parapodium. 



The anterior dorsal cirri are distinctly segmented, but in both specimens 

 segmentation completely disappears before the middle of the body is reached. 

 The first is longer than the rest, rather longer than the breadth of the liody. The 

 ventral cirri are cylindrical and not as long as the parapodia. 



The pliarynx extends to the 10th segment; its tooth is anteriorly situated. 

 The proventriculus extends to the eighteenth segment; it contains about 30 an- 

 nular bands. 



Genus T r v r a x s y l l i s Clajiarede. 



Trypaxosvi.lis ZEiiRA ftrube. 



Syllis zebra, Grnbe, (19), p. 80, Taf. iii., fig. 7. 

 Triipanostjllis krohnii, Claparede, (5), p. 98. 

 T. krohnii, Be St.-Joseph, (48), p. 56 (.180). 



T. ^ebra, Mcintosh, (39), p. 169, PI. 1.. fies. 9 and 10: PI. li., fig. 1; PI. Ixx., 

 fig. 8: PI. Ixxix., fig. 18. 



;' Eurymedusa picta, Kinbcrg, (31), iion Elders, (10). 

 Syllis taeniae formis, Haswell, (25), p. 9, PI. 1., figs. 4 and 5. 

 Trypanosyllis Eichardi, Gravier, (16), p. 168, PI. ix., figs. 12, 13. 

 Trypanosyllis taeniaeformis, Augener, (1), p. 230. 



