EV W. A. HASWELL. 107 



Odoxtosylli.s rrLGURANs And. et Edw. 

 Odontosyllis fulgurans, Audouin et Edwards, Ann. Sci. nat., t. xxix., p. 229 

 Odontosylli^ fulgurans, Mcintosh, (39), p. 178, PI. xlix., fig. 5; PI. lix., figs. 

 15 and 15 a and 6; PI. Ixx., fig-. 11; PI. Ixxx., fig. 4. 

 For i'urtlier synonymy see Mcintosh. 



I have obtained only two specimens of an Odvntosyllis which, if not identical 

 with the European and North American species above named, is very nearly 

 related to it. 0. fulgurans seems to be characterised lay the great length 

 of the proventriculus, running through ten or eleven segments, the hooked falces 

 of the compound setae with a minute tooth near the middle of the cutting edge, 

 and the absence of nuchal or occipital lobe. 



In the living condition the Port Jackson specimens were of a brownish colour 

 with iiregular whitish flecks; the eyes were red. The only complete specimen is 

 about 7 mm. long', with about 50 segments. In one the pigment of the two eyes 

 on either side is to some extent coalescent; in the other the two are close to- 

 gether but clearly separated ; in the former a pair of frontal eyes are represented 

 by a pair of veiltrally placed minute specks of pigment. 



The teeth in the retracted condition of the proboscis lie in the fourth seg- 

 ment. As far as can be made out they are sis in number. A striking feature 

 is the presence in the wall of tlie pharynx, just l)ehind the teeth and immediately 

 in front of the anterior end of the proventriculus, of an opaque ring wliich ap- 

 pears fjuite black in the cleared specimen. A similar appearance on a smaller 

 scale is observable at the posterior end of the proventriculus. These two dark 

 bodies are evidently the proventricular glands, anterior and posterior, wliich I 

 described in the Exogoneae. They, or at least tlie anterior, occur in all Sgllidea 

 bo far as I have observed ; but they ai'e usually very inconspicuous and only recog- 

 nisable in sections* or, in the case of some of tlie Exogoneae, in favourably stained 

 entire specimens. 



Odontosyllis suteri Benham. 

 Odontosylhs suteri, Benham, (2), ]). 161, figs. 1 and 2. 

 Euryrnediisa picta, Ehlers, (10). p. 21. 

 Non Eiiry medusa picia, Kinborg, (.31) . 



Odontosylhs suteri has been found )jy Benham at various points on the 

 coast of the South Island of New Zealand, and also occurs at the Kennadec 

 Islands. I have only hitherto found two specimens in Port Jackson. Ehlers's 

 confusion of this s|iecies with Eurymedusa jricta of Kinberg is referred to under 

 Trypanosyllis zebra. 



0. suteri is characterised (1) by the presence of a wellmarked nuchal lobe, 

 (2) by the falx of tlie compound setae tei-niinating in a single tooth, but having a 

 "secondary tooth" about the middle of the concave edge, and (3) by the very 

 long proventriculus running through 15 segments. As in 0. fidgitrans the pro- 

 ventricular glands are very consjjicuous in the cleared specimen. 



I am indebted to Professor Benham for New Zealand specimens. 



Odoxtostllis feeycinetensis Augener. 

 OdontosyUis freycinetensis, Augener, (1), p. 234, PI. ii., flg. 7; text-fig. .33. 

 I have obtained only one specimen of an OdontosyUis which is certainly 

 identical with Augener's 0. freycinetensis from Western Australia. It is 4 mm. 



*A trace of the anterior crlands is distingiiishable in Auirener's fiffnre of O. "landir 

 losa (Taf. iii., fig. :?7). ^ m ., 



