978 W. C, MINTOSH. 
representations of Dr. Hubrecht,! the able Conservator of 
the Museum at Leyden, and the remarks by M. Marion, 
show that M. de Quatrefages was quite right when he 
doubtfully (as he had mislaid his drawings) alluded to 
this peculiar arrangement. I have to thank Dr. Hubrecht 
for kindly sending me a specimen and fragmentary proboscis 
of his Drepanophorus rubrostriatus (a form probably identical 
with that of M. de Quatrefages) from Naples, and thus per- 
mitting me to clear up most of my doubts, as well as to 
make some additional observations. 
First, then, there can be no difficulty in placing the form 
under the Enopa, since it has a proboscis furnished with 
stylets. It, moreover, agrees with the characters of the 
family AMPHIPORIDmM, since it has rounded ganglia, the 
nerves placed within the two muscular layers of the body- 
wall, and a mouth which opens in front of the ganglionic 
commissures. It falls easily into the subfamily Amphiporine, 
for it has a proportionally large proboscis. There appears 
to be no objection to the institution of a new genus for its 
reception, though, for my own part, specific separation 
seems quite satisfactory. The general appearance of the 
Nemertean is strictly that of the Amphiporine, and it swims 
like Amphiporus pulcher. 
In the remarks on the structure of the species the same 
order as that followed in former publications will be 
adopted, so that the various heads may be easily compared 
with those of Dr. Hubrecht,® who has followed this arrange- 
ment. 
1. Dermal Tissues. 
The cutis (a, Pl. I, fig. XIV) is well developed, and the 
basement-layer, 0, is very thick, as in Amphiporus pulcher. M. 
Marion mentions,‘ with some doubt, “‘a structureless basilar 
layer,” as if he were indicating a new fact ; but this common 
arrangement has been long ago described in many members 
of the order. Exactly in the middle line of the dorsum, 
between the basement-layer and the external or circular 
muscular coat, is a solid band 4 e (somewhat ovoid in trans- 
* “ Aanteekeningen over de Anatomie, Histologie en Ontwikkelin- 
gsgeschiedenis van eenige Nemertinen.’ Utrecht, 1874. 
7 “Ann. Nat. Hist.,’ 4th ser. vol. xv, p. 371 (from the ‘Comptes 
Rendus,’ Feb., 1875). 
* I have to thank the Editors of the ‘Quart. Journ. Mic. Sc. for cour- 
teously forwarding a proof of Dr. Hubrecht’s article, which will appear in 
the same Number. 
2 Op. cit. 
