LiEMODIPODA. 
199 
2. Living within the thoracic cavity of some Brachyura and 
of Porcellana j the last pair of thoracic feet in the larva much 
longer and difierently formed ; the abdominal feet of the larva 
one-bran died. Entoniscus. 
3. Living on Cirripeds. Cryptoniscus, Darwin, including 
Lh'iope, 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. Microniscusy gen. nov. 
Bopyi'iis resupinatus, sp. n., found in a Pagurid in Southern Brazil, and 
described by Fr. Miiller, 1. c. pp. 57-GO, pi. 3. figs. 4-9 ; it feeds on SaccuUna 
purpurea, Fr. Miill., which is a parasite of the same Pagurid, and it belongs 
to the suhgenus lone. Four other species found in Leptograpsus, Porcellana, 
Alpheus, and Ilippolyte, ibid. p. 68. 
Bopyrus ocellatus, sp. n., Czerniavski, 1. c. p. 79, pi. 6. figs. 1-3, Black 
Sea, in the gill-cavity of Virhius 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, Xantlio, and Achceus, in Southern Brazil, and shortly described 
by Fr. Muller, 1. c. pp. 53-5G, pi. 3. figs. 1-3. 
Cryptoniscus planarioides, sp. n., in the same Pagurid with Bopyrus resu- 
pinatus, described and figured by Fr. Muller, 1. c. pp. 61-64, pi. 4. figs. 12-19. 
Microniscus fuscus, sp. n., on the back of a Oopepod, ihid. p. 65, pi. 4. fig. 20. 
PHYLLOPODA. 
Verrill (/. 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 = Btreptocephalus, 
Baird, 1854. 
CLADOCERA. 
Dapiiniid;e. 
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 Haphniidae 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 intes- 
tinal 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 
