Figs. 1 to 4.
EOLIS PEACHII, Alder and H ancock.
E. oblonga, sub-depressa, lutescens vel camea; branchiis numerosis, sub-clavatis, obtusis, luteo-
fuscis, apicibus albis, in seriebus 20 digestis; tentaculis dorsalibus longiusculis, laevibus; tentaculis
labialibus brevioribus j capite lunato, lateribus productis; angulis anterioribus pedis obtusis.
Eolis Peachii, Aid. and Hanc., in Ann. Nat. Hist., 2d Ser. v. 1, p. 191.
Por. and Haul., Brit. Moll., v. 3, p. 591.
Hab. Fowey Harbour, Cornwall, C. W. Peach and J. A. Cullercoats, J. A.
Body about three quarters of an inch long, broadish in front, and tapering gradually to a
point behind; buff-coloured, deepening to a rosy flesh-colour on the back, from the ovary
appearing through. Dorsal tentacles rather long, linear, smooth, approximating. Oral
tentacles about two thirds the length of the dorsal pair, set rather wide apart on the head.
They originate from the margin of the lip, but a ridge passes from them upwards on the
external side, giving them the appearance as if cemented to the upper surface of the lip.
Both pairs are buff-coloured. Head very broad, as wide as the foot, semicircular or lunate,
produced at the sides, and terminating posteriorly in a blunt point on each side. Branchiae
very numerous, slightly clavate, obtuse at the apex; the central gland yellowish brown or
fawn-coloured, a little uneven in outline, and granulated; apices white. The papillae are set
in upwards of twenty very dense rows, extending close to the tail behind, and running along
the sides of the head in front, so as nearly to surround the dorsal tentacles: the rows contain
about eight or nine papillae each. Foot pale buff, of a rosy appearance in the centre when the
animal is filled with spawn: it is rather broad in front, tapering gradually to a blunt point
behind.
This well-marked species was first met with in Fowey Harbour, Cornwall, where it was
dredged by Mr. Peach, and subsequently by ourselves. We afterwards got a single specimen
at Cullercoats, from a zoophyte brought in by the fishing-boats.
The Fowey specimens, which were taken at the end of May, were filled with mature
spawn.
The peculiar form of the head in E. Peachii, similar to what is found in E. nana, but
more strongly marked, and the agreement of these two species in most of their other
characters, including the tongue, induce us to think they ought to form a distinct section of
the genus, intermediate, in some respects, between our first and third sections.
Figs. 1, 2, 3. Eolis Peachii, different views.
4. Three of the branchial papillae, much enlarged.