234 GRUBEA. 



homologue of the larval pharynx (dipharyngeal stage), then the stomach and posteriorly 

 the intestine which sends several lobes into the feet. In connection with the pharynx 

 is a pair of " hamophilinen " glands (dorsal and ventral). The nerve-cords are separate, 

 the ganglia being united by commissures. The typical foot has a dorsal cirrus 

 supported by a bristle, and one of the diverticula of the gut enters it, while at the tip 

 is a stylode. Beneath is the setigerous lobe with a spine and compound bristles of 

 two kinds, which vary from front to rear as regards the condition of the tip. 

 The first kind has long, slender, sharp tips which have a homogomph articulation 

 with the shaft; the second kind appears to have in some cases a homogomph 

 and in others a heterogomph articulation with the shaft, the terminal piece being 

 short with a spinous edge and occasionally a joint at the base. A process of the 

 gut also enters this region of the foot. Inferiorly is the ventral cirrus, into the base 

 of which a diverticulum of the gut passes. The segmental organ opens ventrally at 

 its base. Eisig mentions Schmarda's 1 remarkable Gnathosyllis dijplodonta, which has two 

 bifid stylets in its proboscis, but in many respects it agrees with a typical Syllid 

 like S. armillaris. It comes from the Atlantic. The intermediate form is rather to 

 be sought in the parasitic Autolytus found by Mr. Crossland, though this does not 

 in any way detract from the interesting and important treatise of Dr. Eisig. 



Lately Akira Izuka 3 has found Try pa.no syllis misalciensis with similar caudal buds 

 to those described by Parlin Johonson. The group, indeed, is remarkable for its 

 budding, phosphorescence, and viviparity, though it is not clearly demonstrated whether 

 the last named is due to parthenogenetic development, or impregnation from without or 

 within. Still more recently Michel, who had made remarks on the diverse types of 

 stolons in Syllids, 3 found a more remarkable condition in Syllis arnica which presented 

 no less than twelve supplementary heads in successive rings anteriorly, each as a rule 

 having eyes, articulated tentacles, and palps. 4 



Gravier, 5 in his account of the regeneration of the anterior region in the Polychastes, 

 gives various instances of this in the Syllids ; e. g. JEhlersia rosea, Langerhans, Syllis 

 gracilis, Grube, Typosyllis prolifera, Krohn, Syllis alternosetosa, De St. Joseph, and others. 



Genus XLV A. — Giutbea, De Quatrefages, 1865. Ohar. emend. 



Syllids with palpi coalesced almost to the tip, whilst a furrow separates them inferiorly. 

 Proboscis with a single tooth. Preventriculus with follicular walls; short stomach with 

 a pair of glandular casca; three smooth tentacles; two tentacular cirri. Dorsal cirri 

 smooth, fusiform at the base, attenuate at the apex. Ventral cirri short and tongue- 

 shaped. Bristles compound ; tips often bifid. Carry ova on the dorsum or elsewhere. 



i ' Neue Wirb. Tliiere/ ii, p. 69, pi. xxviii, fig. 220. 



2 < Annot. Zool. Japon./ vol. v, 1906. 



3 ' Compt. Rend. Acad. Sci./ cxlviii, p. 365, 1909. 



4 Ibid., p. 438, 1909. 



5 f Ann. Sc. Nat./ Zool., 9 e ser., t. ix, p. 131, 1909. 



