EVAHNE IMPAR. 355 



brown after the condition in Lagisca. In the cirrigerous segments the arch or band 

 of pigment in the middle of the body terminates in two small touches of dark olive- 

 green, and other touches occur at the base of the cirri. Nine or ten of the terminal seg- 

 ments show these specks on every foot. The proboscidian region is often deeply 

 pigmented. The ventral surface is pale and iridescent, only a tinge of brown occurring 

 on the ridge in front of the mouth. A variety from Bressay Sound, Shetland, has the 

 ventral surface dull olive throughout, with lighter bars, while the dorsum is much 

 variegated with brownish-olive and dark touches. Rarely the anterior half of the mouth is 

 dark olive, and a double row of dark touches occurs at each side of the median depres- 

 sion, whi]e the dorsum is pale madder-brown. In some large examples the elevated ridges 

 posteriorly show pale olive pigment, which in each segment presents two transverse bars and 

 a pale centre. The median longitudinal region is pale. In others similar pigment extends 

 forward to the proboscidian region. The segmental papilla is evident on the sixth foot, 

 and continues nearly to the posterior end. In size it is comparatively large, though it is 

 not long, and points between the feet. The body terminates posteriorly in two long 

 caudal styles, which are much larger than the adjoining dorsal cirri. 



Proboscis. — The extruded proboscis shows a range of nine papillaB of the usual 

 dactylozoid shape dorsally and ventrally. No pigment occurs in the centre of these 

 organs. The pregastric and other cseca follow the arrangement in HarmotJioe. 



Scales (Plate XXXII, fig. 18) fifteen pairs, in the smaller thirteen to fourteen pairs 5 

 somewhat rough in aspect, mottled with brownish pigment and often with a yellowish 

 speck in the centre, best marked posteriorly. The first pair are suborbicular, the 

 succeeding reniform, and the posterior more or less ovoid, though angles are occasionally 

 formed. The external margin is densely ciliated, the cilia having bulbous tips and 

 varying in length. Moreover many occur on the neighbouring surface of the scale, and a 

 few are scattered within the posterior margin. With the exception of the inner and 

 anterior area the entire surface is covered with small horny papilke, which often increase 

 into small spines widely scattered towards the outer and posterior borders, while along 

 the latter are the large pyriform or globular papillas so characteristic of this species. 

 Some of these occur even on the first scales. The summit of each is occasionally roughly 

 papillose, or with a series of large conical spines. These large papilla are sometimes 

 absent, — as, for instance, in those from the tidal region at Lochmaddy, in an example 

 from 690 fathoms (Station 1, ' Porcupine, 5 1870), and in others from Station 6 and outside 

 Gibraltar, while the cilia along the border are longer. Young specimens, as a rule, 

 have smaller processes along the posterior border. Malmgren's figure shows the low 

 rounded bosses very well. The scales are somewhat thin, and the under surface is 

 smooth and glistening. The cilia on the scales are frequently overgrown with a granular 

 parasitic structure. 



In a large specimen dredged by Dr. Gwyn Jeffreys off Valencia the scales were 

 devoid of tubercles. Considerable variation, indeed, exists, for some of those from Herm 

 have shorter cilia with more distinctly globular heads, a feature accompanied by smaller 

 dorsal bristles. 



Feet. — The first has a few comparatively short dorsal bristles, slightly curved, and 

 with closer and finer serrations than the typical form. A very short conical portion at 

 the tip is smooth. 



