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252
Page 129. Add the 3 following species:
Eugerda globiceps, Meinert.
(Suppl. PI. Ill, fig. 1).
Eugerda globiceps, Meinert, Crust, malacostraca, p. 194, PI. II, figs. 53 62.
Specific Characters. Body of female resembling that of E. tenuimana,
but of considerably smaller size, and perhaps also somewhat less slender. Anterior
and posterior sections of mesosome of nearly equal length, and defined by a well-
marked constriction, the former somewhat broader than the latter; 1st segment
well developed, though considerably smaller than the 2 succeeding ones, 4th seg-
ment broader, but scarcely longer than the 1st, anterior corners of all 4 seg-
ments obtusely produced. 5th segment regularly quadrangular in outline, some-
what broader than it is long, and haying the lateral edges straight. Caudal seg-
ment rounded oval, without any lateral notches, tip narrowly rounded. Superior
antennae 5-articulate. Inferior antenna? less slender than in E. tenuimana, scarcely
exceeding l
/s of the length of the body, flagellum shorter than the peduncle,
and composed of only 6 articulations. 1st pair of legs rather feeble, though not
nearly to such a degree as in E. tenuimana; the 3 succeeding pairs with a much
smaller number of spiniform bristles; the 3 posterior pairs likewise poorly provided
with setae, and scarcely at all adapted for swimming. Uropoda of almost exactly the
same structure as in E. tenuimana. Length of adult female scarcely exceeding
2*/2 mm.
Remarks. This form is certainly very closely allied to E. tenuimana,
and I was thereby led to consider it as the very 'same species. Dr. Hansen however,
has found on a closer examination, that the Danish form in reality differs in some
points rather pronouncedly, and should thus more properly be regarded as speci-
fically distinct; and. in order that I might convince myself thereof, he has kindly
placed at my disposal the material upon which Prof. Meinert founded his species.
Indeed, the figures here given, which have been made from Danish specimens, leave
no doubt that Dr. Hansen is quite right in his supposition, and I am glad to be
able to give full evidence of the validity of Prof. Meinert's species. On the
other hand, Dr. Hansen is of opinion, that the genus Eugerda proposed by
Prof. Meinert is quite unmaintainable, and must be regarded as only a synonym
to Desmosoma of the present author. Indeed, the 2 new species
described below
would seem to support such an opinion, since the feeble structure of the 1st pair
of legs cannot be regarded as a distinguishing character of that genus; but
there still remains a character, viz. the very obvious birarnous nature of the