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SIPH0N0ST0MA, CIRRIPEDIA. 205
Zemeeocera barnimii, sp. n., Hartmann, Arch. Anat. Phys. 1870,pp. 726-
752, pis. 17, 18. Fixed on the scales of Labeo niloticus in the Nile. It has
five pairs of natatorial feet, the four anterior pairs bearing two, the last one
branch; the chMnous integument is traversed by numerous microscopical
channels, which are not in connexion with any gland, and do not perforate
the "hypodermis;" the musculature, the maxilla?, the intestinal tract, the
ovaries, and the embryos, which are similar to those of Cyclops, are described.
A previous notice on the same subject is given in SB. nat. Fr. 1870,
p. 60, where it is also remarked that similar channels within the chitinous
integument have been observed in Cecrops and Caliopus.
Lerncea branchialis (L.). A. Metzger, referring to his former paper on the
subject (see Record, vol. iv.), states that the former Cyclops-like stages of
this animal are found frequent on the gills of Pleuronectes fiesus, the transitional
stages to the later form of the female on Cyclopterus lumpus, Gadus
merlangus and morrhua, in February and March, on the coast of East Friesland.
JB. Ges. Hannov. no. xx. for 1869-70, p. 33.
CIRRIPEDIA.
Prof. CLAUSES researches into the second or pupa-stage of Cirripeds,
when they somewhat resemble Ostracods, for the most
part confirm DARWIN'S, especially in some points on which
PAGENSTECHER (Z. wiss. Zool. 1863) expressed a different opinion;
but, in interpreting the homology of the appendicular
organs, Claus urges that the frontal processes which fix the
animal are not homologous to antenna?, because in the larva? of
the lower Crustaceans the latter generally appear as natatorial
feet. The first unbranched pair of natatorial feet is homologous
to the first pair of antenna?, and the second pair of feet with two
branches to the second pair of antenna?, but the homology of the
third pair of feet to the maxillary organs is still to be made out.
The six pairs of cirrated feet of the perfect Cirriped are homologous
to the five pairs of natatorial feet, and to the protuberance
of the genital segment of the perfect Copepod. The nervous
system of the larva is described; and the conical protuberance
in front is said to be a sensitive organ, and is identified with the
opening of Darwin's auditory organ. The cement-glands and
their excretory ducts are less developed in Lepas pectinata and
L. fascicularis (pi. 1. f. 2) than in Conchoderma virgatum (pi. 1.
f. 3), and in another larva of large size, which is not systematically
determined, but furnished the chief material of this paper,
and is figured. Schr. Ges. Marb. v. (1869) Suppl. pp. 1-17,
pis. 1, 2.
Archezoea gigas, nov. gen. and sp! Four to five millims. in size. A new
form of larva of Cirripeds, distinguished by a glandular apparatus within the
shield, and six pairs of movable spines, from the sea, near Chile. A. Dohrn
Z. wiss. Zool. xx. 4, pp. 597-606, pis. 28,29.
Balanus improvisas, Darwin, and an undetermined species, similar to declivis,
Darwin, in the Black Sea. Czerniavski, Mat. zoogr. Pont. pp. 63, 64.