6 NEMERTINES OF PLYMOUTH SOUND. 
was recorded in the Journal of this Association for that month. As 
I then pointed out, it has not before been noticed on the British 
coast. I suggested, however, that a worm described by McIntosh 
as a variety of O. annulata, and obtained by him from the island of 
Herm, was probably identical with this form, and I am still inclined 
to think that this is the case. In the record to which I have 
alluded, I mentioned that upon very close examination under a lens 
extremely faint lines could be detected, apparently similar in position 
to those of C. annulata, except that the median ventral line was 
absent ; these lines not being white, but distinguishable by the red 
colour being along their course somewhat paler than elsewhere. In 
the absence of the median ventral line this species resembles 
C. McIntoshii. In his specimen from Herm McIntosh describes a 
pale lateral line on each side, and faint transverse bars on the 
dorsum. These lines are not mentioned by other writers, neverthe- 
less the general ground colour and the shape and size of the head 
sufficiently characterise my specimen as belonging to this species. 
Distribution: Naples, but not common (Birger) ; fairly common on 
French coast (Joubin). 
2. C. tinnaRis (Montagu, MS.), McIntosh. 
LINEUS LINEARIS, Montagu, MS. 
CARINELLA ALBIDA, Birger. 
The validity of this species has lately been called in question by 
Joubin, who is inclined to regard it as identical with Valencinia 
longirostris. There is no doubt great external similarity, but sections 
clearly reveal that the two specimens which I refer here belong 
to the genus Carinella, and not to Valencinia. The position of the 
nerve-cords between the basement membrane and the muscular coat 
of the body, and the absence of an outer longitudinal muscular layer, 
in which in Valencinia the nerve-stems lie, are quite conclusive as 
to this. 
Both my specimens were dredged at the Duke Rock, the one 
on May 17th, the other on September 30th. Both were small, 
the second specimen measuring 1 cm. in length and 0°5 mm. in 
breadth. The first specimen was too mutilated to allow of measure- 
ment, but, judging from the size of the head, was much the same 
length as the other. The colour was milk-white in both cases, but 
in the first specimen there was a reddish tinge over the head. A 
transverse groove was present at the back of the head dorsally, but 
was difficult to trace. The head was broader than the body and 
somewhat spathulate, though its mobility was such that no very 
definite shape could be assigned to it, the snout being at one time 
