AMPHIPODA. CIIILTON. 77 



POLYCHERIA ANTARCTICA (tit-ebbing). 



Polycheria aiit<n-fti<-, Chilton, 1912, p. 502 (with 

 synonymy). 



Locality. Sanders Bank, Kangaroo Island, 28 fathoms, 

 one specimen (Reg. No. E. 4855). 



This specimen is about 4 mm. long; it has the antennae 

 subequal and not longer than the head and first three 

 segments of the peraeon; in the third nropod the rami are 

 only slightly unequal. In these points it resembles the 

 description of P. brevicornis, Haswell, but on the other 

 hand the eye is large and red, fully as large as in P. 

 tenuipes, and I have no doubt the "Endeavour" specimen 

 is immature and that Haswell 's two species are only stages 

 in the life-history of one, as already suggested by Stebbinir. 



I have fully discussed the described species of Polycheria 

 elsewhere and come to the conclusion that they are only 

 forms of the one species, P. antarctica (Stebbing), which 

 is very widely distributed in southern seas and extends 

 north of the equator in one or two localities. 



LEMBOS PHILACANTHUS (Stebbing). 



(Fig. 11 c.) 



Lernbos pJulucantliHx, Stebbing, 1888, p. 1082 ? pi. 110. 

 Lembos pliil<i<'<intlnis, Stebbing, 1910, p. 605. 



Localities. Tasmanian Coast, two specimens (Reg. No. 

 E. 5352) ; Eastern Slope, Bass Strait, several specimens 

 (Reg. No. E. 5356). 



These specimens vary considerably in size and in the 

 structure of the gnathopoda, but they present such a general 

 resemblance that I think they all belong to one species 

 and that they must be referred to L. philacanthus, Stebbing. 

 the type specimen of which was obtained from the same 

 locality. Some of the differences observed are doubtless 

 due to stages of development and to sexual characters. 



My specimens differ from Stebbing 's description in 

 having the eye round and the lateral lobe of the head 

 narrowly rounded, while he described the eye as reniform 

 and the lateral lobe acute. The appendages are long and 

 slender as in the specimens examined by him ; they evidently 

 increase in length with the development of the animal. 

 The antennae and peraeopoda agree with his description, 

 the peraeopoda having the basal joints rather narrow and 

 not dilated. 



