THE NEMERTINES OF MILLPORT AND ITS VICINITY. 27 
the Millport specimens coincide rather with sanguineus in the fact that the head is 
scarcely wider than the rest of the body, in the usual arrangement of the eyes in regular 
rows, and also in the fact that they may coil themselves into a firm ball. The last 
character is, however, occasional rather than common ; the animals, when not aggregated 
together in a heap, usually lie along the water-line on the side of the dish. Thus, 
though I did not meet with any forms corresponding in colour to MacInrosn’s descrip- 
tion of L. sanguineus, the above facts would seem to confirm the propriety of uniting 
this with LZ. gesserensis under a common appellation. 
Micrura scotica, n. sp. 
One specimen only was found; this was dredged in 15 fathoms off Ascog Bank. 
Length 23 inches (about 60 mm.), breadth 24 mm.; body oval in transverse section, 
margins not flattened ; posterior end tapering ; in general appearance the specimen was 
not unlike Linews ruber. 
In colour the dorsal surface was light brown with a purplish tinge, uniform over all 
but the posterior part, where the situation of the alimentary canal and its lateral 
branches appeared pigmented, the rest pale; the margins of the body were white, and 
the ventral surface whitish; there was a small red area near the tip of the snout, 
between the anterior eyes; the area of the nerve ganglia was reddish, and the margins 
of the mouth were whiter than the rest of the ventral surface. 
‘ The animal either coiled itself up into a ball when at rest, or lay in loose folds ; 
part of the body might be thrown into a spiral. In contracting itself, it contracted 
the anterior part most, so that this part of the body then appeared wrinkled. 
Locomotion was effected by a rapid gliding. The animal could not swim; but 
frequently progressed easily and naturally in a backward direction, in its usual 
gliding manner and not by contractions of the body-wall. 
The head (fig. 17) was of the shape of an elongated triangle, with a blunt and 
rounded apex at the snout ; it was slightly marked off from the body, and was scarcely 
as broad as the succeeding region. The cephalic grooves extended along its sides in its 
whole extent; the posterior part of the depth of the grooves was red, The anterior end 
of the head bore three retractile papille, a dorsal or vertical, and a lateral on each 
side ; each was an elongated, ridge-like elevation, and the three were arranged so as to 
radiate from a common centre at the anterior end of the axis of the body. In the 
retracted condition of the head, a groove made its appearance on the anterior end of the 
ventral surface ; and this, conjoined with the retraction of the three papille, gave the 
appearance of the crossing of a horizontal and a vertical groove at the tip of the snout. 
The eyes were arranged in two rows, one on each side anteriorly, near the lateral 
margin (fig. 17); they were difficult to see well and to count, as, except the anterior 
ones, they were small and were just under cover of the pigmented area, not in the 
marginal pale zone. There were eight on the left and five on the right side; the 
anterior eye on each side was considerably larger than the others. 
