"^'iSi!^,i:t" ^MMm in the Uni.

LJEMODIPODA. 199
2. Living within the thoracic cavity of some Brachynra and
of Porcellana; the last pair of thoracic feet in the larva much
longer and differently formed; the abdominal feet of the larva
one-branched. Entoniscus.
3. Living on Cirripeds. Cryptoniscus, Darwin, including
Liriope, Rathke.
4. Parasitical on Copepods; the third pair of thoracic feet
longer than the other, and terminating in an oval lamella, by
which the animal fixes itself on its host. Microniscus, gen. nov.
Bopyrus resupinatus, sp. n., found in a Pagurid in Southern Brazil, and
described by Fr. Muller, /. c. pp. 57-60, pi. 3. figs. 4-9; it feeds on Sacculina
purpurea, Fr. Miill, which is a parasite of the same Pagurid, and it belongs
to the subgenus lone. Four other species found in Leptograpsus, Porcellana,
Alpheus, and Hippolyte, ibid. p. 68.
Bopyrus ocellatus, sp. n., Czerniavski, I. c. p. 79, pi. 6. figs. 1-3, Black
Sea, in the gill-cavity of Virbius gracilis, Heller.
Cryptothiria pygmcea (Rathke), the male found free swimming far from
the shore in the Black Sea by Czerniavski, ibid. p. 78.
Entoniscus porcellance and cancrorum, spp. nn., found in different species
of Porcellana, Xantho, and Achceus, in Southern Brazil, and shortly described
by Fr. Muller, I. c. pp. 53-56, pi 3. figs. 1-3.
Cryptoniscus planarioides, sp. n., in the same Pagurid with Bopyrus resupinatus,
described and figured by Fr. Muller, I. c. pp. 61-64, pi 4. figs. 12-19.
Microniscus fuscus, sp. n., on the back of a Copepod, ibid. p. 65, pi 4. fig. 20.
PHYLLOPODA.
VERRILL {I. c.) gives a fuller account of his researches on
Branchipus and Artemia (Zool. Rec. vi. p. 617). B. vernalis,
Verrill, is made the type of a new generic division, Eubranchipus;
Heterobranchipus, Verrill, is recognized as = Streptocephalus,
Baird, 1854.
CLADOCERA.
DAPHNIIDjE.
The morphology of the hard parts, the process of moulting,
and the description of venous sinuses are noticed by F. PLATEAU,
Mem. Ac. Belg. xxxv.; abstract in Ann. N. H. (4) v. p. 367.
Hyalosoma, gen. nov., described by Nic. Wagner in Russian, in 'Trans.
Russ. Natur. S. Pet.' H. dux, sp. n., pp. 218-238, pis. 1-4,1868. He says
that it is distinguished from all known Daphniida? by the solidity of its test,
the lengthened form of its body, the strong jaws, six pairs of strong feet, and
the articulated postabdomen. Its biological functions, however, are not in
accordance with this high degree of morphological development; the intestinal
tract is a simple tube, wanting the hepatic sacs; the postabdomen is
not used as an organ for swimming, the feet are nearly immobile and quasi
" petrified," and it moves slowly on the mud at the depth of about two feet;
it has been found in the lake Boltschoi-Kaban, near Kasan, in July. The