134 DALHOUSIELLA CARPEXTERI. 



it the aspect of a racquet. In the examples from the ' Porcupine ' not a few of the dorsal 

 bristles had a granular parasitic mass near the tip, as, indeed, is liable to happen in spiked 

 bristles. That the type of bristle should be so altered (as shown in Professor Poule's right- 

 hand figure in fig. 29, Plate XXV) is peculiar. He has likewise omitted to record the 

 presence of the spikes. His artist has, further, taken considerable liberties in his drawing 

 of the ventral bristles (Plate XXV, Q.g. 28), but perhaps the style of plate adopted is 

 unsuitable for the illustration of structures so delicate and yet so characteristic. The distal 

 segment of the palpus has also been overlooked in Plate XXI, fig. 10, and the sub-frontal 

 papilla is tapered to a point, whereas that in the specimens from the 'Porcupine' is blunt. 



Genus XLII. — Dalhousiella, 1 Mcintosh, 1901. 

 Head devoid of a median tentacle, with a deep median furrow separating the closely 

 approximated eyes. Tentacles about the length of the palpi. Tentacular cirri— eight 

 pairs — from the peristomial segment backward, and furnished with spines. Tips slightly 

 moniliform. Body typical of the Hesionidge. Proboscis with firm muscular wall, no 

 teeth. Foot — dorsal division represented only by two small black spines at the base of 

 the long dorsal cirrus— ventral, with compound (falcate) bristles. Ventral cirrus long 

 and subulate. 



1. Dalhousiella Oarpenteri, Mcintosh, 1901. Plate LVIII, fig. 18— head ; Plate 



LXXVIII, fig. 7— bristle. 



Specific Characters. —Read typical ; devoid of a median tentacle. Tentacles appear 

 to be about the length of the palpi, which have a short terminal segment. A deep median 

 furrow separates the rounded lobes on which the large and closely approximated eyes 

 (four) are placed. Eight pairs of tentacular cirri, with spines, and slightly moniliform 

 tips. The papilla beneath the snout is small (or little elevated). Body typical, about one 

 and a quarter inches long (in spirit), and with seventeen bristled segments. Two short 

 anal cirri occur beneath the vent, but the extremity seems to be injured. Proboscis with 

 a firm wall and glistening internal surfaces. Xo teeth. Shape of the feet somewhat 

 uncertain, but they are long, and appear to diminish more towards the outer edge than in 

 Leocrates. Dorsal cirrus arises behind the ridge of the foot, has two small black 

 spines, and is long, tapering, and slightly moniliform. Xo dorsal bristles visible. 

 Setigerous region tapers towards the outer extremity, where a papilla occurs. Spine 

 black and powerful. Bristles have comparatively short shafts which are minutely striated 

 longitudinally and transversely. When seen on edge the tips of the shafts are somewhat 

 fusiform from the dilatation below the bevelled region. In lateral view the dilatation is 

 less pronounced, though the diameter is greater, and the striaB are oblique. The dorsal 

 limb of the fork is the longer, but is frequently broken. Edge of the distal blade is 

 minutely spinous, even up to the base of the fork. Ventral cirrus slender and subulate, 

 stretching beyond the tip of the setigerous process. 



1 The genus Dalhousia was named in honour of the Earl of Dalhousie, late Secretary for 

 Scotland, vide c Annelids of the Challenger/ p. 186. 



