50 Mil. A. O. WALKER ON AMPHIPODA 



Fifth perseopods : the 1st joint oblong and longer than the 

 rest o£ the limb. 



All the last three pairs of perseopods have the hind margin of 

 the 1st joint rather deeply serrate, the front margin of all 

 the joints spinous, and the dactyli one-third the length of the 

 5th joint, slightly curved. 



Uropods subequal iu extent, the 1st and 2nd with the peduncles 

 and rami subequal and spinous ; the peduncle of the 3rd shorter 

 than the rami, with a few strong spines at the distal end ; rami 

 spinous, the inner slightly shorter than the outer. 



Telson longer than the peduncle of the 3rd uropods ; cleft 

 almost to its base, with 4 or 5 submarginal and a terminal spine 

 on each division. 



Length 20 mm. 



This species much resembles T. antennipotens, Stebbing, and 

 T. larlatipes, Stebbing, but differs from both in its shorter first 

 joint and longer accessory appendage of the flagellum of the 

 upper antennae, in the shape and relative proportions of the 

 hand and wrist of the 1st gnathopods, &c. It is also very near 

 T. angulata, G. 0. Sars, but differs in the shape of the lateral 

 angle of the head. 



Tetphosa Mueeati *, n. sp. (PI. 9. figs. 45-51.) 



One male specimen. Tube A. 39. No locality given. 



Body moderately compressed. Eirst 4 side-plates at least 

 twice as deep as the segments. Third segment of metasome 

 with the hind margin almost straight, the lower margin slightly 

 convex ; posterior angle subrectangular. First segment of the 

 urosome with a prominent triangular carina. 



Head : lateral angles produced and subacute. Eyes obsolete. 



Mouth-organs normal. Epistomal plate prominent, evenly 

 rounded. 



Upper antennse : 1st joint stout and twice as long as the 2nd 

 and 3rd united. Flagellum' 23-joiuted, the first as long as the 

 next four, with a double row of setiferous ridges ; tlie 5th very 

 short. Accessory appendage 6-jointed, reaching a little beyond 

 the 5th joint of the flagellum, the 1st joint about as long as the 

 next three. 



Lower antennse : second joint of the peduncle longer and 

 stouter than the last. Flagellum with about 30 joints. 



First gnathopods : the 1st joint as long as the 3rd, 4th, and 

 5th ; the carpus about as long as the propodos, which is somewhat 



* Named in honour of my friend Mr. Q-, Murray, F.R.S. 



