340 HARMOTHOE MARPHTSiE. 



clavate cilia. Colour pale brownish inclining to buff, with a red patch on the head 

 and a purplish hue over the proboscis. Under surface pinkish with a broad streak of 

 carmine. 



Synonyms. 



1876. Earmothoe marjphysse, Mcintosh. Trans. Zool. Soc, ix, p. 384, pi. lxix, f. 11—14, and 



pi. lxx, f. 7. 

 1890. „ „ Malaquin. Ann el. Boulon., 21. 



Habitat. — In the galleries of Marphysa sanguinea in Guernsey, and from chinks in 

 the rocks, Polperro (British Museum). 



Head (Plate XXVII, fig. 11) rather elongated from before backward, rounded in 

 front instead of having the usual peaks, and with the widest part behind the middle. Eyes 

 small ; the larger anterior pair wider apart, and situated laterally in front of the middle 

 line at the edge of the red patch on the head. The small posterior pair lie in front of 

 the nuchal collar and behind the red patch. A slight median groove runs forward to 

 the base of the median tentacle, the column of which is absent. The lateral tentacles are 

 inferior (i. e> below the rounded anterior border of the head), short, with filiform tips, and 

 have a few short clavate papillae. The palpi are short and stout, with delicately tapered 

 extremities. No papilla) were visible, but they may be present in section. The tentacular 

 cirri are comparatively short and slender, with finely tapered points. On the surface 

 are a few clavate cilia. 



Body somewhat elongate, with the feet greatly developed posteriorly. Bristle-bearing 

 segments thirty-two to thirty -three. The segments after the twenty- third (bristled), 

 however, are in process of renewal. The markings on the dorsum are less distinct than 

 usual, as the feet are separated by deep clefts. The feet increase in bulk after the twelfth 

 bristled pair, becoming larger and longer, a feature which may be connected with repro- 

 duction. An elevated line occupies the middle of the dorsum in the preparation, while 

 ventrally the median region has a depressed line at each side with a cushion-like ridge 

 between. The segmental eminence is well marked, and a distinct conical process 

 extends between the feet. The process is evident about the seventh foot, and continues 

 almost to the posterior end. 



The colour is pale brownish inclining to buff, with a red patch (from the ganglia) 

 on the head, and a purplish hue just behind (clue to the proboscis), while a faint median 

 streak occurs on the dorsum. The cirri are pale brownish, pellucid, the two caudal 

 styles being darkest. The under surface is pinkish, with a broad streak of carmine in 

 the centre. 



The scales (Plate XXXII, fig. 13) appear to be thirteen or fourteen pairs (possibly 

 fifteen), covering the dorsum and easily separated, but the specimen is not in a condition 

 to give accuracy in this respect. In front they are rounded, then reniform, and even 

 somewhat quadrate posteriorly. They are rather thin, apparently smooth and pellucid, 

 the anterior only having a pale brownish patch on a whitish portion. Under the 

 microscope, however, a belt of small papillae (spines) occurs within the anterior bay of 

 the scale, in front of the scar. Other pale points which resemble these (by transmitted 



