44 EEV. T. K. E. STEBBING ON AMPHIPODA FROM 



are narrow, elongate, subequal, with numerous margiual spines and spinules ; tlie finger 

 comparatively small. 



Pleojwds. Inner margins of the peduncles closely adjacent ; coupling-spines small ; rami 

 with eleven or twelve joints, and two cleft spines on the first joint of the inner ramus. 



Uropods. Of these little more can be said than is stated in the account of the genus. 

 The short peduncle of the third pair has a dentate. apex, to which the long inner ramus 

 is perhaps very loosely attached, as it was wanting from the majority of specimens, 

 notwithstanding the protection given by the folding of the j)leon ; in young ones not 

 yet released from the maternal pouch it was well developed. 



Telsoii not longer than broad, scarcely so long as the peduncle of the third uropods, 

 the sides convex till near the apex. 



Length, without the flexed portion of the pleon, from about a tenth to an eighth of 

 an inch, or 3 mm. 



Localitij. Port Jackson, in Australia. Sent by Professor W. A. Haswell, M.A., D.Sc. 



The specific name is derived from ^Aartrc, broad, and rwroc, a back. 



EXPLANATION OF THE PLATES. 



U.S., upper antenna ; a.i., lower antenna. 

 I.S., upper lip; lA., lower lip. 



m., mandible; mx. ], 2, 1st and 2ud maxilla; nixp., luaxillipcds. 

 (jn. 1, 2, 1st and 2nd gnathopods ; prp. 1-5, 1st to 5th pcrteopods; br., branchial vesicle. 

 pip., plcopods ; ur. 1, 2, 3, 1st, 2nd, and 3rd uropods. 

 T., telson. 

 A line above the figure of a whole specimen indicates the natural size. 



Plate 6. 



Parhijale fasciger, n. g. et sp. 



The lateral view of the whole animal and the figures on the left hand and down the centre of the Plate 

 are from male specimens, those on the right hand are from a female specimen. 



The antenniB and appendages of the perteon and pleou have a uniform enlargement ; so also, but 

 on a higher scale, the mouth-organs, portions of the gnathopods of both sexes, the third uropods 

 and telson of the male, second and third uropods and telson of the female, portions of the first 

 maxilla and mandibles being still more highly magnified. 



Plate 7. 



A. Lysianax cinghaknsis, n. sp. 

 All the parts are magnified to the same scale, except a portion of mx. 1, which is more highly magnified 

 than the rest. 



B. Lysianax cubensis, n. sp. 

 The antennae, limbs, uropods, and telson are drawn to the same scale, while still more magnified figures 

 are given of the mouth-organs, part of the second gnathopod, second and third uropods, and telson 

 in two positions. 



