South African Crustacea. 81 



uropod, cleft nearly five-sixths of its length, tapering, with a row of 

 five or six spines standing up along the surface of each division, with 

 accompanying setae or setules, of which there are some also on the 

 outer margins. 



The male specimen is about 6 mm. long ; the considerably larger 

 female was about 8 mm. in length. 



Locality. Lat. 33 9' 30" S., long. 28 3' 00" E., dredged in a 

 depth of 47 fathoms. 



The specific name directs attention to the southern origin of this 

 form, which presents so many points of resemblance to the northern 

 T. acanthurus, from which, however, it is separated by some very 

 marked differences. A comparison with Pseudotiron bouvieri, 

 Chevreux, from the Mediterranean, is also of interest, but there the 

 organs of vision and the minute third joint of the mandibular palp 

 supply characters of generic distinction. 



FAMILY GAMMAKID^. 



GEN. CEBADOCUS, Costa. 



1853. Ceradocus, Costa, Eend. Soc. Borbon., n. ser., vol. ii., 



p. 170. 

 1906. Ceradocus, Stebbing, Das Tierreich, Amphipoda, p. 430. 



CEKADOCUS KUBROMACULATUS (Stimpson). 

 1855. Gammams rubromaculatus, Stimpson, P. Ac. Philad., vol. vii., 



p. 394. 



1906. Ceradocus rubromaculatus, Stebbing, Das Tierreich, Amphi- 

 poda, p. 430. 



Locality. Lat. 33 49' S., long. 25 56' E. Two specimens were 

 dredged from a depth of 24 fathoms, on rocky ground. One of the 

 specimens has the second gnathopods very unequal and dissimilar, 

 but, as noticed in the report on the Amphipoda of the Challenger, 

 this appears to be the case not unfrequently in this species. 



GEN. ELASMOPOIDES, n. 



Most of the superficial characters as in Elasmopiis, but (in female) 

 first antennas not longer than second, accessory flagellum elongate. 

 Palp long in mandibles and maxillipeds. Inner plate on inner 

 margin fringed with numerous setae in first and second maxillae. 

 Second gnathopod powerful in female. 



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