W. C. M'INTOSH ON BEITISH ANNELIDA. 385 



border, and behind the red patch. The tentacle is absent. The antennae are short, 

 with filiform tips, and furnished with a few clavate papillae. 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 papillae. 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 papillae, 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 

 having a faint brownish patch on a whitish portion. Under a power of 350 diam. 

 minute and widely separated papillae 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 tlian in Mahngrenia cas- 

 tanea. Only a few of then* tips project beyond the skin. One of the longer is shown in 

 PI. LXIX. fig. 11, and one of the shorter and stouter in PI. LXX. fig. 18. The ventral 

 bristles have long shafts and comparatively short terminal portions. The superior 

 examples present a simple termination (PI. 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 Haemothois lunulata, 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 Acholoe astericola, D. Ch., on 

 Astropecten irregularis tossed on Southport sands. 



The head resembles that of H. mari)hjsm ; 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 antennte and tentacular cirri have the same shape and 

 papillae. The palpi are smooth. The dorsal cirri taper to a fine point, and have well- 

 marked clavate papillae 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 



