Rev. T. R. R. Stebbing's Revision of Amphipoda. 207 



Fam. Phoxocephalidae. 

 Parhaepinia, gen. nov. 



Hood obtuse. Eyes distinct. Mandibles with the molar 

 small or obsolete, third joint of the palp longer thfin tlie 

 second. First maxillee with the palp two-jointed. MaxiUi- 

 pcds with outer plate elongate and fourth joint of the palp 

 long and slender. The third and fourth perajopods liave the 

 fourth and fifth joints not expanded. Telson deepl)^ cleft. 



The type species is Phoxus viUosus, Haswell, if I am riglit 

 in identifying with that species the Phoxus Batei of Q. jM. 

 Thomson, a New Zealand species, for the opportunity of 

 examining which I am indebted to Mr. Thomson. 



Fam. AmphilocliidaB. 

 Tetradeion, gen. nov. 



Pleon short. First four side-plates with neatly fitting 

 margins, together ibrming a continuous shield ; fourth pair 

 much longer than tiist to third combined, fifth much longer 

 than deep, sixth and seventh concealed. Eyes distinct. 

 Antennte small, first without accessory flagellura. Mouth- 

 parts unknown. First and second gnathopods imperfectly 

 subchelate. Perseopods slender. Third uropods not reaching 

 so far back as the two preceding pairs, the rami unequal. 

 Telson entire. 



The generic name is from the Greek TerpaZelov, a set of 

 four, in allusion to the combination of the first four side- 

 plates. 



The type species is '■'■ Cyproidial crassa,^^ Chilton, found in 

 Lyttelton Harbour, New Zealand. 



Paracyproidea, gen. nov. 



In general like Cyproidea, Haswell, but the mandibles 

 have a well-developed molar, the apex of the inner plates in 

 the maxillipeds is transversely truncate, the first and second 

 gnathopods are much more slender, rather feebly subchelate, 

 the fourth joint of the first pair produced along the fifth, as 

 in the male of Aora, Kroyer ; the uropods have their respec- 

 tive rami subequal, those of the first and second pairs reachino- 

 little beyond the third, and the telson is very large, strongly 

 compressed laterally, extending back almost to the extremity 

 of the uropods. 



The type species is Cyproidea lineata, Haswell, for speci- 

 mens of which I am indebted to Professor Haswell, F.R.S., 

 and to the Trustees of the Australian Museum, Sydney. 



15* 



