56 Prof. M'li.tosli's Xu/esfrom the 



are reasonable, and the list might ;ilso include tlie Sphnero- 

 doridae. The surface-pa |)illoe (PI. III. fig. G) closely resemble 

 those of the Chlorsemicise. and the jointed bristles with tlie 

 bifid tip are not unktiown in that family. The end of the 

 shaft is dilated and minutely striated (PI. III. fig. 8), and 

 the whole organ is thin and frngile. The bristles are 

 minutely spinose (PI. III. fig. 9), a character which may be 

 larval. 



In the Irish example the long bristles are minutely 

 spitiose (PI. III. fig. 9) and by no means stiff, and they appear 

 to be longest posteriorly. The specimen hid fairly large ova. 

 The peculiar hooks are disproportionately large and are 

 translucent (PI. III. fig. 7). The flattened shaft is narrowed 

 at the base (origin), slightly dilates as it goes upward, and 

 ends in a broad, slightly oblique, articular margin, which is 

 not qiiite smooth. Toward the upper part the shaft is finely 

 and obliquely striated. The terminal piece is of consider- 

 able length, bluntly pointed inferiorly, where the membranous 

 attachment fixes it, and slightly narrowed distally, the tip 

 being curved like a hook, and a secondary process appearing 

 beneath. The neai-est, perhaps, is the bristle of Stylerioides 

 arcuosa, though it also approaches the outline of several of 

 the Sigalionidae. 



This spec'es was introduced by the elder Sars'^ in 1835 

 under the name of Nais clavicomis. He describes it as half 

 an inch in length and as having thirty-six segments in its 

 roundtd body, which was slightly tapered anteriorly and 

 moi'e distinctly posteriorly. The head lias two eyes and a 

 pair of tentacles, whilst the succeeding region has four pairs. 

 The surface of the body is denst'ly papillose, and a series of 

 tufts of long bristles flank the sides. Posteriorly, moreover, 

 peculiar jointed hook-like bristles occur. The capillary 

 bristles were shorter in front, attained considerable length 

 about the sixth and eighth feet, and then diminished in 

 length posterioily. He procured it near I'loroen. 



(irube, in his ' Pamilien der Anneliden ' ■\ (1851), gave the 

 Nais clavicomis of Sars the generic title of Macrochteta, and 

 placed it in his family Amytidea in a heterogeneous assem- 

 blage, including Puliihoslrychus, QErsted, Ainytis, Savigny, 

 Polynice^ Savigny, Piedocharis, Elirenberg, and others. 



Langerhaus J (1880) included M. clavicomis^ which he 

 had not infrequently found at Madeira, under the Cirra- 



* ' Beskrivelser og JagtlagelseiY p. 64, pi. ix. fig. 24, a-d. 



t P. 64. 



X Zeitschr. f. wi.ss Zuol. Bd. xxxiv. p. 95, Taf. i. fig. 7. 



