56 Prof. M'liitos'u's Xofesfrom tie 



arc rcason:il)lo, and the list niiu^ht also include the Sph?ero- 

 doridie. The surt'aee-i)a|)ilhc (PI. 111. fig. G) cicsoly resemble 

 those of the Chloricmiilie, and tlie pointed bristles with tlie 

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

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

 the whole organ is thiu and fragile. The bristles are 

 niinntelv spinuse {V\. 111. fig. 9), a character which mav be 

 larval. 



In the Irish example the long bristles are minutely 

 spinose (PI. III. fig. U) and by no means stiff, and they appear 

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

 The peculiar hooks are disjjroportionately large aud are 

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

 at the b;ise (origin), slightly dilates as it goes upward, and 

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

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

 and obliquely striated. The terminal i)iece is of consider- 

 able length, l)luntly pointed inferiorly, where the membranous 

 {•.ttachuient fixes it, and slightly narrowed distally, the tip 

 being curved like a hook, and a secondary process appearing 

 beneath. The nearest, perha[)s, is the bristle of Sti/lerioides 

 arcuosa, though it also approaches the outline of several of 

 the Sigalionidffi. 



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 taj)ered anteriorly and 

 more distinctly posteriorly. Tlie head has two eyes and a 

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

 The surface of the body is densely papillose, and a series of 

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

 peculiar jointed hook-like bristles occur. The capillary 

 bi'istles were shorter in front, attained considerable length 

 about the sixth and eighth feet, and then diminished in 

 length posteiiorly. He proeuied it near Moroen. 



drube, in his ' Familien der Anneliden 'f (1851), gave the 

 Nais clavicomis of Sars the generic title of Macrochata, and 

 placed it in his family Aniytidea in a heterogeneous assem- 

 blage, including PolyhoHlrychus, CErsted, Ainytis, Savigny, 

 Pohjhice, Savigny, I'ledocliuris, Ehrenberg, and others. 



Langerhaus I (I8&0j included M. clavicomis, which he 

 had not infrequently found at Madeira, under the Cirra- 



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



t P. 64. 



X Zeitschr. f. wjps Z ol. Bd. xxxiv. p. 9o, Taf. i. fig. 7. 



