Translation 2816

39
cal or as.y.mmetrxçal. Length 9-25AJ. (Halophilous and perhaps
occurring also in freshwater)...... G. albulum 43.
Key, for the identification of the
species
(1tF6).
A. Posterior end r.ounded,.
i.
.l.
Transverse gpoove slightly inclined , and longitudinal
gr.ooye does not extend onto the anterior part
Q^ the bodÿ. Apex is regularly rounded. Chromatophores
are present; there are no stigmata. See also under B.
G. Pascheri 5.
Transverse groove is
steeply incline d(distinctly helical)
(a) Body is br.oad3.y ova1l anterior part cap-shaped, somewhat
angul.ar along the transverse groove. Chromatophores absent;
é h mmM ^.^ rreëend. T.aY^cr}n li{ G. j,yalinum 1.
-` Zb -..I l
(b) Body is more e].o_ngated].y oval, anterior part more rounded,
. . -----^ --- -.
pri.ncipal-ly along the transverse groove, with chromatophores.. •
Stigma is present, Length 23Y . G. pusiYlum 2.
(c) Bpdy is o-void. _Longitudinal groove is distinctly displaced
to the right, running across the entire ventral side, crossing
._._
the -lett zte.ntrai edg.e, and extending somewhat onto the dorsal
side of the epiva:l•ve. Leng-i:h 23-40R . Questionable species.
G. Traunsteineri 3-
(d) -In addition to those with x.ound.ed antapical ends, individuals
,ui..th Q..panded poste:r?.or end always are also present. Trans-
.verse g^D.o-ve Is peç:asionàll:y -very slightly inclined
See.
.under B2a. ,. ,e .s ,• n a a .. .& a , G. Paschcri 5.