AMPHIPODA — STEBBING. 571 



Antennae short, sub-equal. Epistoine separated from the upper 

 lip by a deep sinus. Mandibles little developed, palp affixed 

 close to the base of the trunk. Outer plate of first maxilla 

 armed with broad crenulate teeth. Outer plate of maxillipeds 

 much developed, reaching middle of palp's third joint. Hand 

 of first gnathopods not subchelate. Hand of second gnathopods 

 not chelate. All the peraeopods carrying one or two accessory 

 branchial lobes. Rami of third uropods lanceolate, furnished, 

 in the female, with long plumose setae. Telsou deeply cleft. 



Characters based on a single female specimen are naturally 

 open to modification. Thus Mr. A. O. Walker has shown that 

 in the male the second antennse attain a much greater length 

 than the first pair. The integument of the small species obtained 

 by the " Thetis " is not especially hard. 



It is not easy to suggest a place for the classification of this 

 genus among the other Lysianassidse. M. Ohevreux himself 

 points out the features which remove it from Menigrates and 

 Lepidepecreuvi^ to which in some respects it shows proximity. 

 He also gives reasons for not accepting Walker's suggestion of 

 its nearness to Socarnes, a suggestion in which I should myself 

 be disposed to concur. Yet Walker puts a stumbling block in 

 the way of this approximation by saying that the inner plate of 

 the first maxillae has " four or five unequal plumose setae." 

 Chevreux, on the contrary, figures and describes this plate with 

 only two such setae, as is the case in the " Thetis " species of 

 this genus and in ISocarnes vahlii (Kroyer). 



There are not many of the Lysianassidae which have the fourth 

 side-plate of the peraeon so strongly produced under the fifth as 

 in Waldeckia. One of these is Kerguelenia, in many ways an 

 exceptional genus. But the same peculiarity is found in the 

 enigmatical Ephippiphora kroyeri, White. Of this species 

 descriptions have been ofieied by White, Bate, G. M. Thomson, 

 Haswell, aud Miers. Unfortunately Thomson and Haswell only 

 quoted Bate, Haswell introducing by a misprint a dorsal spine 

 instead of a dorsal sirms in the fourth segment of the pleon. It 

 was this sinus, common to a great many of the Amphipoda, 

 which probably suggested to White the pie-occupied generic 

 name Bphippiphora — saddle-bearing. An opportunity kindly 

 furnished me by Mr. G. M . Thomson of examining the New Zealand 

 form induced me to call it JVatmonyx thomsonP , but I now think 

 that it should be transferred to a separate genus, which may be 

 na.med Pai-aivaldeckiafrom itsagreement with Waldeckia in possess- 

 in<^ accessory lobes to the branchial vesicles. In addition to other 



3 Stebbing— Das Tierreich, xxi., 1906, p. 2(5, 



