102 AUSTIJALIAX SYLLIDAE, EUSYLI,IU.VE AXD AUTOLy'IIDAE, 



Whether Kinberg's Eury medusa pieta is the same as Trypanosi/llis zehra must 

 remain somewhat uncertain until the type sjjecimen has l)een re-examined. The 

 original diagnosis of the former is not very adequate; nor are the figures of it in 

 the "Eugenies Resa" of much value in distinguishing the species. But the name, 

 and the locality afford some indication "Port Jackson, Novae Hollandiae, summa 

 aqua." On the other hand, the New Zealand and South Australian species whieh 

 Ehlers put down as Eurymedusa picta Kinberg, after examining Kinberg's ori- 

 ginal specimen, is quite distinct, and has been determined by Benham as a si^eeies 

 of Odontosyllis (see Odontosi/Uis suteri Bonhain) . 



T. zebra is not at all rare a little below low-water in Port Jackson, frequent- 

 ing especially the roots of the Laminarian Eklonia radiata. It is one of the larger 

 iSyllids, attaining a length of as much as 6 or 7 cm. Both male and female 

 stolons are white with two pairs of red eyes. 



The mode of stolonisation in the Port Jackson form is that des^cribed by 

 Marion and Bobretsky (45), and De St.-Josoph (48) as characterising T. zebra 

 [See Potts (47), p. 13] . When the stolon is ready for separation tlie stuck hears 

 ventrally a small prolongation terminating in a pair of anal ciiri. 



Family EITSYLLIDAE. 

 Genus S y l l i d e s Oersted. 

 Syi.lides L0XGICI17HATA Oersted. 



Syllides longicirrata, Oersted, (46), p. 11, Tab. ii., fig. 2 a-h. 



Syllides longicirrata, Malmgren, (41), p. 39. 



Syllides longocirrata, Langerhans, (36), p. 548. 



AnoplosylUs ftdva, Marion et Bobretzky, (45), p. 28, PI. ii. and iii.. fig. 8. 



? Syllis ochracea, Marenzeller, (42), p. 27, Taf. iii., fig. 1. 



Syllides longocirrata, De Saint-Joseph, (48), p. 165 (41). 



Syllides longocirrata, Augener, (1), p. 229. 



The three specimens of Syllides which I have obtained in Port Jaeksor 

 agree very closely with Marion and Bobretzky's description and figure of Anoplo- 

 sylUs fulva except in one point, which may be of some importance. My speci- 

 mens have well-developed lenses in the frontal eyes — a condition rarely met with. 

 The posterior eyes have no lenses. I have not been able to see the ventral simple 

 setae referi-ed to by Langerhans. The dorsal simple setae, which are gently curved 

 find blunt, occur singly on all the pai-apodia except the first tlu-ee. 



The yellow corpuscles which are distributed over the whole dorsal surface ol' 

 the peristomium correspond very closely" with the constituent elements of the 

 "yellow bodies" of the Exogoneae. In a female specimen ovaries occur from the 

 ninth setigerous segment backwards. 



Genus E T' r y s t l l i s Ehlers. 



EORYSYLLIS TUBERCULATA EhlcrS. 



Eurysyllis tuhercuhihi, Ehlers, (0), p. 264. Taf. 11, fig's. 4-7. 

 Polymasttis paradoxus, Claparede, (5), p. 109, PI. viii., fig. 3. 

 I have seen only two sjiecimens of this remarkable form, obtained a1 Point 

 Piper, Port Jackson. aiiKnig Algae. 



