LEIOCHONE (CLYMENE) EBIENSIS. 315 



for the shortness of the main fang, which comes off nearly at a right angle to the neck, 

 and increases in breadth from the shoulder to the crown, and for the flatness of the 

 latter. The main fang is rather short, but acute, and the gular bristles are separated by 

 a short interval from its base, curve to the tip, and then rise above it. Six teeth (as usual 

 in lateral view) occur on the crown behind the main fang, but there is little elevation. 

 The bristles and hooks of segments 13 to 23 are best developed. 



Reproduction. — The example procured by the 'Porcupine' at Station 2, 8th July, 

 1870, was laden with apparently ripe ova. 



Young forms of this species occurred in the sticky grey mud of Ardmaddy Bay> 

 Lochmaddy, on August 13th. They were a little more than J in. in length, and the most 

 noteworthy feature was the conspicuous nature of the bristles in four of the short 

 segments in front of the caudal process, which was proportionally large. The last three 

 are directed forward, and the tuft in front backward, though much weight need not be 

 placed on this feature. 



The tube, which is figured by the original authors, is in the Zetlandic example 

 somewhat firm though friable, and is composed of sand-grains and minute fragments 

 of shells attached to a central lining of secretion. 



In the edition of the ' Regne Animal ' by the disciples of Cuvier, Milne Edwards 

 introduced as the type of the " Clymenes," Savigny (an abranchiate setigerous group 

 which he associated with the Lumbrici), a new form which w^as termed Glymene 

 ebiensis. No description further than the explanation of the six figures in a footnote is 

 given, but the form is recognisable, and is characterised by the pyramidal shape of 

 the cephalic segment and the absence of cirri on the anal funnel. In the plate the 

 annelid with its tube of the natural size, two views (dorsal and ventral) of the cephalic 

 lobe, and a figure of the posterior end of the body are given, besides four of the 

 hooks magnified. The cephalic region is diagnostic, but the posterior end, or, as it 

 is called, "Extremite anale," represents only the ruptured constricted region between two 

 preanal bristled segments, while the figure of the hooks is scarcely diagrammatic. The 

 tube is evidently composed of sand-grains cemented to a lining of secretion. 



Grube 1 (1851) doubtfully characterises the species as having a small anal funnel, and 

 places it under the division of those with the plate of the head-lobe small. Sars, again, 

 thought his Glymene Miilleri 2 somewhat approached this species, but there are decided 

 differences. De Quatrefages 3 placed the species under his genus Leiocephalus, which he 

 instituted for those with a head terminating in a papilla, and with no, or hardly any, 

 cephalic plate. The anterior region of the body is stated to be composed of three elongate 

 segments, the feet are biramous, the inferior division indistinct. He characterises the 

 head as acute, protracted, with the cephalic lobe almost absent. The first segment, 

 moreover, has no dorsal division. Kinberg 4 gives two foreign genera (Chrysothemis and 

 Sabaco) with a comparatively simple anal funnel, but there is nothing else in their 

 structure to associate them with the present species. 



1 <Fam. Annel./p. 157. 



2 Ann. Nat. Hist./ 1857, ser. 2, vol. xx,p. 156. 



3 Anneles/ ii, pp. 242—243. 



4 '(Efversigt K. Vetensk.-Akad. Fort./ 1866, pp. 340, 341. 



