162 Prof. M‘Intosh’s Notes from the 
at the same time tinting the cephalic plate. In front of 
the third bristle-tuft the anterior region has a smooth and 
glistening cuticular coat, which is iridescent; and at the 
segment-junction in front of the tuft (third) a faint reddish 
belt, apparently from a blood-vessel, occurs. The next 
segment-junction has a belt of red on each side of it, 
apparently of reddish pigment, the specks of which pass 
a short way on the following segment (fifth bristled), which 
has its bristle-tuft about the middle. Then there is a 
slight constriction of the body-wall—at which a broad 
red belt occurs, a bristle-tuft (sixth) being placed just 
in front of another red belt which passes all round the 
body. The next bristle-tuft (seventh) is in front of a 
furrow marking another segment, the anterior third of 
which has the broadest band of red yet met with in front. 
This is followed by a pale region ending at the next bristle- 
tuft (eighth), and concluding the specially differentiated 
region anteriorly, the seventh to eighth tufts being sepa- 
rated by a long interval. The next segment and half of 
the following are coloured except at the margins by’a 
Jongitudinal belt of red, apparently along the intestine, 
probably from an intestinal sinus, and thereafter the reddish 
hue is due to the longitudinal and circular vessels, especially 
those of the gut, the tip of the tail and its cirri being pale. 
In these examples the majority of the short anal cirri had 
processes at the tip, as Arwidsson shows in his figure *, 
and describes as ‘short, fringe-like lobes,’—some being 
only bifid, others trifid or quadrifid, whilst each of the 
processes in a bifid form may have two or more minor 
papille at the tip. Occasionally the cirrus ends in a 
bluntly conical apex, with a minute papilla at each side 
near the apex. The gut itself is yellowish or pale orange. 
The proboscis, which is constantly protruded by the animal 
when removed from its tube, shows a tinge of red from 
a blood-vessel along the middle in extrusion, and its distal 
region appears to be smooth. 
2. On Cirratulus (bioculatus) incertus, W‘7, 
In the ‘ Monograph of the British Marine Annelids ’ + 
ambiguity was caused by the use of the specific name 
bioculatus for a Cirratulid dredged in the Zetlandie seas 
by Dr. Gwyn Jeffreys, the name dioculatus having been 
applied by Keferstein{ to another Cirratulid differing 
* Proc. Roy. Irish Acad. vol. xxix. no. 6, p. 219. 
+ Vol. iti. pt. i., text, p. 253. 
{ Zeitschr. f. wiss. Zool. Bd. xii. p. 121, Taf. x. figs. 25-27, 
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