W. C. MSINTOSH ON BRITISH ANNELIDA. 385 
border, and behind the red patch. The tentacle is absent. The antenne are short, 
with filiform tips, and furnished with a few clavate papille. The palpi are short and 
stout with delicately tapered extremities. The tentacular cirri taper to a fine point, 
and have a few sparsely distributed clavate papille. The dorsal cirri are similar to the 
latter, and have no trace of any swelling below the tip. The ventral cirri have a few 
short papille, and do not extend beyond the fleshy portion of the foot. 
The scales in the specimen are fourteen pairs, smooth and pellucid, the anterior only 
haying a faint brownish patch on a whitish portion. Under a power of 350 diam. 
minute and widely separated papillz occur in the usual positions. Few or none appear 
on the edge of the scale. They are rounded in front, reniform, or even somewhat 
quadrate posteriorly. 
The dorsal bristles are very slender, and much more delicate than in Malmgrenia cas- 
tanea. Only a few of their tips project beyond the skin. One of the longer is shown in 
Pl. LXIX. fig. 11, and one of the shorter and stouter in Pl. LXX. fig. 18. The ventral 
bristles have long shafts and comparatively short terminal portions. The superior 
examples present a simple termination (P]. LXIX. fig. 12), while a distinct secondary 
process is observed in the succeeding forms (figs. 13, 14, the latter being seen from 
the front). Toward the ventral edge of the group the tips are again simple (fig. 15). 
In this species the body is moderately and the head peculiarly elongated. ‘The feet 
are long and prominent, and the ventral tubercle at their base very distinctly marked. 
They become decidedly larger about the fourteenth or fifteenth segment; but whether 
this is due to abnormality or otherwise is unknown. After nine longer pairs the rest 
(posteriorly) are shorter. When the animal was placed in an open vessel beside 
Marphysa sanguinea it clung to the body of the latter near the head. 
Closely allied to the foregoing is HarMoruoii Lununata, Delle Chiaje, a form very 
generally distributed throughout British waters, from Shetland to the Channel Islands, 
and from the west coast of Ireland to the east coast of Scotland. Dr. Carrington, of 
Eccles, first found it in this country, in company with Acholoé astericola, D. Ch., on 
Astropecten irreqularis tossed on Southport sands. 
The head resembles that of H. marphyse; only the eyes are somewhat larger, and 
the head less elongated. The tentacle terminates in a filiform tip, and has sparsely 
distributed clavate papillae. The antenne and tentacular cirri have the same shape and 
papille. The palpi are smooth. The dorsal cirri taper to a fine point, and have well- 
marked clavate papille sparsely distributed. The ventral cirri also have the same pro- 
cesses, and reach considerably beyond the bases of the nearest bristles. 
The scales are fifteen pairs (not twelve as stated by Dr. Carrington). In some of 
the Zetlandic examples they are faintly tinged with brown toward the posterior 
border; in others each scale has a brownish ring, or the brown pigment forms a bold 
border for the inner (exposed) third, and sends a process (in some cases enlarged near 
