THE NEMERTINES OF MILLPORT AND ITS VICINITY. 13 
The general colour is brown, with sometimes a greenish tinge, especially towards and 
on the head; the green colour can sometimes, especially from the ventral surface, be 
seen to be due to the diverticula of the alimentary canal. In one specimen, the green 
became a distinct blue on the anterior part of the head. Sections show a blue granular 
deposit in the walls of the alimentary canal, especially in the anterior part of the body. 
The ventral surface is lighter in colour; the margins of the body are clearer; a thin 
stripe of a lighter tint in the middle line of the anterior part of the body is due to the 
proboscis cavity. The genital products may show as yellowish masses within the lighter 
margins of the body. 
The head is somewhat circular in shape, with median anterior notch; it is broader 
than the succeeding part of the body, and is fairly well marked off. The eyes are 
numerous, and not usually distinctly arranged in two groups on each side. No grooves 
were to be seen in the living animal, though they are apparent in transverse sections of 
the head. 
The stylet is very large, with a sabre curve, and is situated very near the anterior 
end of the body ; the basis (v. fig. 6) is much elongated, at least twice as long as the 
stylet, and swollen at its proximal end. There are two reserve sacs; seven stylets were 
counted in each. 
The condition as to head-glands and other gland-cells in the head, the cerebral 
organs, and position of the mouth are as given by BURGER (3, 5). The statement in the 
Tierreich, that ‘der Blinddarm reicht bis in die Nahe des Gehirns,” is a little mis- 
leading ; it is, as in H. neesiz, two long anteriorly directed diverticula of the caecum, one 
on each side, which nearly reach the brain, and the condition might have been described 
in terms identical with those used in the definition of the latter form. 
The differences between the above description and the accounts of previous observers 
are, except perhaps with regard to the eyes, not considerable. Green or brownish 
(greyish, olive-) green appears to be the commonest colour; MacInrosu and Jousin 
have noted a bluish tinge. MacInrosn’s plate does not show the head as being marked 
off from the body. er 
The eyes are stated (MacInrosu, BUrcER) to be arranged in two or three groups 
on each side. MaclInrosH adds that the middle group on each side is nearer the middle 
line of the head ; his plate, on the other hand, does not show any marked division into 
groups, nor is the middle group, such as there is, any nearer the middle line than the 
anterior group—rather the reverse, in fact. BUrorr (3) adds that the eyes are in 
rows in the anterior, massed together in the posterior group. 
Emplectonema (Nemertes) neesit (Orst.). 
Common, especially in the byssus of mussels, on the Keppel pier; also between 
tide levels. 
Length two to four feet (considerably greater than the lengths found by previous 
