THE NEMERTINES OF MILLPORT AND ITS VICINITY. 5 
MacInrosu (7-30 inches) and especially Jousrn (7). ‘The latter speaks of specimens 
measuring 80 cm., and sometimes 1°5 metres, and quotes (UATREFAGES as giving 2 metres. 
The striking coloration has been described in detail by previous writers. Briefly, 
the general colour of the body varies from a rich red to a vandyke brown; there is a 
white mid-dorsal stripe, a pair of similar lateral stripes, and a number of white trans- 
verse stripes which encircle the whole body; the mid-dorsal stripe does not reach the 
anterior end of the body, but leaves a red “frontal patch” (Stirnfeld), undivided at the 
anterior tip. 
Points which have either not received mention by previous observers, or in which 
my specimens, which were generally of a brilliant brown colour, differ from theirs, are 
as follow :— 
(i.) The frontal patch was always less brilliant, or lighter in tint, than the rest of 
the coloured surface of the dorsum. This was evidently not the case in BircEr’s 
specimens; the frontal patch is stated to have the same appearance as the general 
coloured surface of the body, and it is so shown in the plate. 
(i1.) The ventral surface was of a lighter brown than the dorsal; it was sometimes 
white in the greater part of its extent, becoming light brown posteriorly, though here 
still much paler than the dorsum. 
(i1.) The mid-dorsal and lateral white stripes consisted of a dull white ground with 
a longitudinal stripe of a more intense opaque white down the middle of each; the 
transverse stripes also had mostly a similar appearance. 
(iv.) The genital apertures appeared as a series of whitish spots, dorso-laterally 
placed, beginning some distance behind the head, at first in a single row on each 
side, but more numerous posteriorly. 
The cephalic grooves slightly notch the lateral borders of the head a little in front 
of the level of the mouth: thence followed inwards on the dorsal surface they have a 
slightly sinuous course, at first convex forwards, then concave, ending near the median 
line ; on the ventral surface they are continued directly inwards from the lateral notch, 
almost meeting each other in the middle line. 
The cerebral organs are present in this genus as mere grooves, not as canals or 
sacs. Maclnrosu, however, in the general account of the cephalic sacs of the Anopla 
(10), says: “Just in front of the external border of the curved dorsal groove on the 
snout of Carinella annulata is an ovoid body apparently homologous with the fore- 
going, but I have not yet been able to trace its anatomy, on account of the opacity 
of the cutaneous tissues in this animal.” In his description of this species he says: 
“There is a curved streak in the bend of each ciliated furrow on the dorsum, perhaps 
in connection with the cephalic sac.” The corresponding figure (10, pl. xvii., fig. 24) 
shows an ovoid structure of fair size in the bend of the groove on the dorsal surface, 
near the lateral margin, a little in front of the level of the mouth. BURGER states (5) 
that in this species, “ die cerebral Organe sind kugelige Gebilde.” 
The true state of affairs appears to be as follows: On the dorsal surface of the 
