CRUSTACEA. 
517 
8p. n., p. G17, from Cape York; hicarinatus (Gray), North and South 
Australia. 
III. Caudal laminfo not membranaceous. 
a. Cephalo thorax with longitudinal keels : (Erichson). 
h. Cephalothorax without keels. 
aa. Lateral caudal laminae (two last pereiopods) spinulous : aus^ 
traliensis (M.-E.), Sydney. 
hi). Lateral caudal laminae with a longitudinal keel : suhg. Engmis 
(Erichs.): /ossor (Erichs.) and cMM^cwZ«nws (Erichs.), Tasmania. 
Callianassa tridcntata, sp. n.. Martens, 1. c. p. 614, Java. 
Axius, There appears to be only one British species, A. stirynchus ; the 
differences in the shape of the telson, urged as specific by some authors, ori- 
ginate probably from drying. Norman, Ann. &: Mag. Nat. Hist. ii. p. 177. — 
A. hiserratus, sp. n., Martens, Monatsber. Akad. Wiss. Berlin, 1808, p. 612, 
Malacca. — A. ylyptocercus^ sp. n.. Martens, ibid. p. 613, Cape York, Australia. 
Remarks on the origin of this generic name, ibid. p. 614. 
Gchioysis, g. n., allied to Gehia^ but the hands perfectly didactyle. G. ni- 
ttdus, sp. n., Alph. M.-Edw. Nouv. Arch. Mus. iv. p. 63, pi. 18. figs. 4-7, Cape- 
Verde Islands. 
N 
Carides. 
Ci'angon fasciatus (Risso) and Cr. scidptus (Bell) may be the same species, 
and perhaps depauperated specimens of Cr. boreas (Phipps). Sp. Bate, Ann. & 
Mag. Nat. Hist. ii. p. 118; an observation opposed by Mr. Norman, ibid. p. 178. 
Nika (Risso). The mandibles formed on th^pkin of Crangonidse. N. 
cotichii (Bell) scarcely to be distinguished as a species from N. edidis (Risso), 
Sp. Bate, I c. p. 120, pi. 11. fig. 3. 
Atya (Leach). This genus, as well as the allied Caridina, appears to be 
confined to fresh water. The genus Atyoida (Randall) cannot be maintained, 
as its only character, the want of the strong development of the third pair of 
thoracic feet, is shown in Philippine specimens to be regular in younger indi- 
viduals of Atya ; specimens of this genus found inihe Moluccas, Java, and the 
Philippines belong perhaps all to one species, A. armata (Alph. M.-Edw.). 
Martens, Wiegm. Arch, xxxiv. pp. 47-50, pi. 1. fig. 6 (A. armata^ young). 
Bphyra (Roux) and Atyephyra (Brito-Capello). The first has a well-de- 
veloped palp on the mandible, which, however, is not bipartite, a long slender 
rostrum with a few distant indentations, a branchiostcgous spine on the ce- 
phalothorax, no hairs on the hands, and a keeled abdomen ; it is marine, and 
contains the two species mentioned by Risso and Roux, and E. hdckeli, sp. n., 
from Messina, j^fephyra has no palp on the mandible, many teeth on the 
rostrum, a suprac^tal and antennal spine on the cephalothorax; the hands 
are beset with h^Pand approach in their structure those of Atya, and the 
abdomen is roun^d above. It lives in fresh water. To this genus belong, 
besides the typical species, rosiana (Brito-Capello) from Portugal, also Ephyra 
compressa (Haan) from Japan. Atyephyra belongs in all respects to the 
Atyid(S\ has no very near affinities, but resembles in several cha- 
racters Pasipha'e, and may be placed, as has been done by Milne-Ed wards, with 
the PeneidfB. Martens, 1. c. pp. 61-65, pi. 6. fig. 4, A tyephyra compressa ; fig. 7, 
Ephyra hdckelii. 
Alpkeus edwardsii (Audouin) is British, Sp. Bate, Ann. &; Mag. Nat. Hist. ii. 
