Mr. W. A. Haswell on the Australian Amphipoda. 31 



comparatively few ; and even where they occur in consi- 

 derable masses (as is ,the case on the dead parts of coral 

 reefs with certain fucoids) their edriophthalmous inhabitants 

 are not numerous, and belong, so far as at present ascertained, 

 to cosmopolitan genera — the species being, in many cases, 

 identical with those of the temperate zone. Amongst living 

 coral but few Amphipoda or Isopoda are to be found ; and the 

 use of the dredge at various depths in the neighbourhood of 

 the coral reefs did not produce a large variety of forms ; the 

 Orehestidae, however, are quite as abundant on sandy and 

 stony beaches in the tropics as in temperate latitudes. The 

 following is a summarized account of the species observed : — 

 A species of Talitrus inhabits damp woods and scrubs in 

 New South Wales and Tasmania, being found in the former 

 colony at least thirty miles from the sea ; and another occurs 

 under dead wood and leaves in the mangrove-swamps of 

 tropical Queensland. Species of Talorcliestia, Orchestoidea y 

 Orchestia, and Allorchestes are abundant on the shores of 

 Tasmania, New South Wales, and Queensland. 



A species of Stegocephalus (S. latus), broader and higher 

 than the Arctic species, and distinguished from it in various 

 other particulars, is found in Tasmania. 



A remarkable new form, which I have named Cyproidea 1 

 from its superficial resemblance to a Cyprid, is represented 

 by two species found in Port Jackson. It is characterized 

 by the possession of deep lateral shields, formed not, like the 

 corresponding though much smaller structures in the sub- 

 family Stegocephalides (Spence Bate), by the coxae of the 

 second gnathopoda and first and second pereiopoda, but by 

 those of the first and second pairs of pereiopoda alone, these 

 being enormously expanded, extending forwards to the sides 

 of the cephalon and backwards nearly to the level of the 

 posterior limit of the pereion, concealing the inconspicuous 

 coxae of the gnathopoda, and excavated above and posteriorly 

 for the reception of the shallow amalgamated coxae of the 

 third and fourth pairs of pereiopoda, the coxae of the last 

 pair of pereiopoda remaining rudimentary. These shields 

 almost conceal the gnathopoda and all but the tips of the 

 pereiopoda, and are variously ornamented with coloured dots 

 and lines in the two species. The antennae are simple and 

 subequal ; the mandibles palpigerous ; the maxillipedes un- 

 guiculate and armed with small squamiform plates ; the gna- 

 thopoda subchelate (complexly in one species, simply in the 

 other) ; the posterior pleopoda biramous, and the telson 

 simple. 



Another characteristic genus is one which I have named 



