310 LEIOCHONE (CLYMENE) EBIENSIS. 



Grube, 1 in his remarks on the group, pointed out that for a proper classification of the 

 Maldanida3 both ends of the body are necessary, and therefore the precise position of 

 Audouin and Milne Edwards' Olymene ebiensis is uncertain. He would in the meantime 

 decline to place this species under the genus Leiocephalus, De Quatrefages, and thought 

 that it perhaps was identical with G. intermedia (which the examination of a perfect 

 specimen shows that it is not). He mentioned two species with smooth anal funnels, viz. 

 G. urceolata, Leidy, 3 and G. leiopygos, Grube. The latter will be mentioned elsewhere ; 

 while the number of the segments, their condition as regards bristles, and the large 

 urceolate anal funnel of the former leave doubts as to its identity with G. ebiensis, even 

 with the necessary margin for imperfect description. 



A specimen, incomplete posteriorly, and in its tube of coarse sand, was dredged by 

 Dr. Grwyn Jeffreys in the Outer Haaf, Skerries, Shetland, in 1867, and was recognised by 

 the pointed snout, the somewhat swollen anterior segments, and the absence of the usual 

 frontal flattening, whilst the shape of the hooks was diagnostic. 3 It was at the same time 

 stated that it was allied to Grube's Olymene leiopygos from Oherso, though, of course, this 

 diagnosis rested on the characters of the anterior region only. The acquisition of a 

 perfect specimen, however, shows that Grube's species differs in the number of bristled 

 segments, which are twenty-three, as well as in the form of the anal cup and the preanal 

 segments. The anal cup, moreover, follows the last bristled segment, and thus materially 

 differs from the condition in Olymene ebiensis. It was subsequently procured in the 

 6 Porcupine ' Expedition of 1870 at 305 fathoms in the Atlantic, but in this specimen 

 also the posterior region was absent. Hansen's Olymene Korenif another form with a 

 smooth anal funnel, has only eighteen bristled segments, and the cephalic plate is like 

 that in Maldane : whilst the Nicomache Mclntoshii of Marenzeller 5 has a flattened and 

 otherwise divergent funnel, though it is smooth. 



Prof. Benham (1896) considers that Olymene lumbricoides, De Quatrefages, is fairly 

 common, but there is ambiguity, for whilst he describes the British form as having an 

 entire anal funnel and a laterally compressed prostomium, De Quatrefages states that the 

 anal funnel has alternately large and small denticulations in Olymene lumbricoides. In all 

 probability Prof. Benham refers to Glymene ebiensis. 



So far as can be observed the Leiochone clypeata of De St. Joseph appears to be this 

 species, for there is no point of difference except the presence of what he calls pennate 

 forms amongst the shorter bristles anteriorly. He rightly expresses doubt as to the 

 identity of Audouin and Milne Edwards' form, but on the whole it could not well be any 

 other species. De St. Joseph thought Grube's Glymene digitata the same form. The 

 hooks of De St. Joseph's form differ from the typical hook of Leiochone ebiensis, and more 

 resemble that of Leochone Johnstoni, from Loch Alsh, but as the figure shows no downward 

 curve posteriorly (the distal line being straight) some doubt remains as to its accuracy. 



i < Abh. Schles. Gesellsch. f. vat. Cult./ 1867, p. 52, and ' Ann. Nat. Hist./ 1868, ser. 4, vol. ii, 

 p. 393. 



2 ' Marine Invert. Bhode Isl. and N. Jersey/ 1855, p. 145. 



3 < Trans. Koy. Soc. Edinb./ 1869, vol. xxv, p. 422. 



4 ( Norwegian N. Atlantic Exped./ 1882, p. 40, pi. vi, figs. 1—5. 



5 ' Polychaten Angra Pequena-Bucht, Zool. Jahrbuch/ Bd. iii, p. 19, Taf. i, fig. 8. 



