Genus Eupolyodontes Buchanan'). 



Eye-peduncles large, arising laterally from the base of the prostomium. Median antenna 

 (tentacle) rudimentary, inserted on the nuchal part of the prostomium; lateral antennae arising 

 from under its frontal margin. Parapodia with branchial papillae on the dorsal surface. 



I. Eupolyodontes amboinensis Malaquin et Dehorne. PI. XXXVIII, figs. i^ — 3. 

 {Eupolyodontes giilo Gr.). 



Loc. cit. p. 34S, PI. LI, figs. i, 3 and 4, PI. LH, figs. 5 — 11. 

 MaRENZELLER, Polych. des Grundes, 1902, p. 7. 

 COLLIN, loc. cit. p. 741. 



Stat. 231. Ambon Anchorage, reef. 2 incomplete specimens. 



Of this huge Annelid, tïrst collected by Bedot and Pictet in 1890, two incomplete spe- 

 cimens were found ; one specimen broken in three fragments, measures 68 cm. in length, and 

 has 330 segments, whereas the other one has a length' of 42 cm. and consists of 195 somites. 

 Not much is to be added to the elaborate description by Malaquin and Dehorne of Bedot's 

 two specimens; however in neither of them the proboscis was everted, as happened to be the, 

 case with one of our worms. Thus I could state that it much resembles the proboscis of .ê'z^/ö/jW. 

 {Panihalis) »iits2ckurii, figured by Izuka -) ; it shows in the median dorsal and ventral line of 

 the anterior margin a large papilla, measuring 10 mm. in length, rather broad at its base and 

 tapering distally. On the right and left side of each papilla is a row of 1 8 low, ridge-shaped 

 papillae, much resembling the teeth of a comb. The jaws have behind .the strong apical tooth 

 a dozen of small teeth on the cutting edge. Grube^) also found in Enpolyod. iPolyodontes) gnio 

 "18 kurze, stumpfe, weiche Papillen"; however according to his description there should only 

 be 9 small papillae on each side of the large median one. 



With regard to the nature of the small appendix, situated at the posterior margin of 

 the prostomium, l am rather inclined to join the opinion of Marenzeller*), who considers it 

 to represent the median antenna (tentacle) of other Acoëtidae, pushed away by the large lateral 

 eye-peduncles; for Mal.\quin and Dehorne, who call it a nuchal organ, as did Miss Buchanan ^) 

 before them, have proved indeed, that it receives a nerve from the posterior region of the 

 supra-oesophageal ganglion, but they failed to demonstrate, that it contains the characteristic 

 clements of a nuchal organ, viz. ciliary cells, gland cells etc. The buccal segment does not con- 

 tain any bristles ; a semilunar ridge is visible between the base of the rather short, stout ten- 

 tacular cirri, that are nearly of the same length. The second parapodium has a small papilli- 

 form notopodium, whereas its neuropodium is much larger, compressed in the longitudinal 

 direction, and contains five large spines and ventrally a fascicle of setae serrulatae ; its ventral 



1) A Polynoid with branchiae {Eupolyodontes corNhhi) : Quart. Journ. of Microsc. Science, Vol. XXXV, 1894, p. 433, PI. 27. 



2) Annotat. Zoolog. japooenses, Vol. V, 1904, p. 23, pi. I. 



3) Beschreib. neuer oder wenig bekannten Anneliden, .^rch. f. Naturgesch. Jahig. XXI, 1855, p. 83. 



4) Polych. des Grundes. 1902, p. 7. 



5) Loc. cit. 



86 



