266 HERMIOXE HYSTKIX. 



fig. 5). The tentacular cirri are similar. The dorsal cirri increase in size, but have the 

 same structure. In all these, minute rounded glands (like papillas) are dotted over the 

 granular layer of the epiderm, and may be associated with sensation. They are quite 

 beneath the cuticle, which is somewhat dense. At the tip or bulbous part of the 

 appendix the cuticle is thin, so that the nervous expansion comes close to the surface. 



Body. — About two inches long, large specimens being two and a quarter inches (De 

 Quatrefages), and is covered dorsally by the fifteen pairs of scales, which largely overlap. 

 They vary in tint from pale to dark brown, with a slightly iridescent purplish sheen, 

 and are firmly fixed by their pedicles near the middle of the external border. Under a 

 moderate power they present a fibrillar or cordate structure, and the exposed surface has 

 a series of minute papilla, the anterior region alone being devoid of them. The edge is 

 smooth. The first pair are small, and have the scar for the attachment of the pedicle 

 near the centre. They again diminish posteriorly, but the structure remains the same. 

 The Mediterranean forms are generally darker than those from the Channel Islands. 



The ventral surface of the body is covered with a firm cuticle studded with minute 

 papillse, which are slightly brownish, especially on the feet at the commencement of the 

 posterior third. Anteriorly the buccal fold forms a broad, rounded, finely grooved flap, 

 diminishing to a nearly cylindrical ridge posteriorly. The minute papillge are numerous 

 on the edges of the buccal fold. A median and two lateral ridges flanked by the feet 

 characterise this surface, as in allied members of the group. 



The segmental papillae commence on the eighth foot, and continue to the twenty- 

 ninth, that is, about the fourth foot from the tip. 



The papillse of the proboscis are, like the others, somewhat dichotomous in their 

 division (Plate XXXVII, fig. 4), the tips of many of the processes being broadly and 

 more or less symmetrically lobate, or having a process at one side so as to be pedate. 

 They seem to be flattened, and thus in the preparations do not readily separate from each 

 other. They differ much in outline from the same processes in Lmtmatonice filicornis. 



The dorsum is flanked by the lustrous brown spines (Plate XXXVI, fig. 11), which 

 are directed backwards and slightly outwards. In some views they are brownish, while 

 in others they have a rich golden sheen. Anteriorly the granular spines stand upwards 

 with the curve directed towards the middle line, the inner bristles spreading over the 

 dorsum. The lateral brush, again, on the cirrus-bearing foot is directed outwards and 

 with a backward curve. As soon as the long spines become prominent the pedicle for 

 the scales causes a radiate arrangement of the stiff tapering bristles (Plate XXXVI, 

 fig. 9), which spread over the dorsum and meet those of the opposite side in a symmetrical 

 and graceful manner. The outer bristles of this series are more erect; the inner are 

 adpressed, so as to guard the scales. These bristles are of a rich golden colour, with 

 pale tips. 



Three recurved fangs, as a rule, occur on each side of the tip of the spines (Plate 

 XXXVI, figs. 12, 14, and 15), besides the smaller pair at the angle of the spear-tip. 

 They are more nearly opposite (though the last two are not so) than in Lxtmatonice 

 filicornis. 



Feet. — The first foot has pale, simple bristles, the tufts being directed forwards and 

 inwards, and the basal portions of the tentacular cirri are warty like the tentacle. 



