REPORT ON THE ISOPODA. Ill 



shows indications of being divided into three joints of which the two distal are very 

 short ; the third joint of the peduncle is extremely short, the fourth and fifth elongated 

 and subequal. The flagellum is shorter than the peduncle and consists of six 

 joints. 



The chelvpedes are very stout and strong ; the first joint is the stoutest and longer 

 than the two following joints ; the third joint is as usual very inconspicuous, the fourth 

 joint is as long as the basal joint of the hmb but rather more slender, the chelge are 

 very powerful ; the upper margin of the penultimate joint is furnished with a stout 

 spine ; distal to this is a prominent convex area beset with short tubercles from the 

 side of each of which arises a short stiff hair ; the distal region of the joint is short 

 and pointed, and overlaps the corresponding extremity of the sixth joint. 



The fossorial limbs are furnished with a slender short three-jointed exopodite, 

 which is probably also represented in the chelipedes though I did not find it. 



The first joint is stouter than the corresponding joint in the following appendages, 

 and longer than any of the succeeding joints ; the three following joints are compara- 

 tively short and subequal, together equalling in length the basal joint; the distal 

 extremity of the last of these joints has a. few stout spines; the penultimate joint of 

 the limb is rather slender and much shorter than the preceding joint; it has four or 

 five stout spines along the inner margin ; the distal joint of the appendage is a long- 

 curved claw, one-third longer than the penultimate joint. 



The remaining thoracic appendages (fig. 3) do not differ materially in structure, but 

 they are in every case more slender than the fossorial limbs. 



The abdominal appendages are all present and similar to those of other species. 



The uropoda are as long as the whole abdomen together with the two last segments 

 of the thorax ; that is to say, when measured from the attachment of the appendage to 

 the extremity of the endopodite. The basal joint is stout and extends a little way 

 beyond the end of the caudal shield. 



The exopodite consists of six joints, the distal ones being much more elongated than 

 the proximal. The endopodite is of very great length and has twenty or twenty-one 

 joints. 



Station 149h, off Cumberland Bay, Kerguelen, January 29, 1874; lat. 48° 45' S., 

 long. 69° 14' E.; depth, 127 fathoms; volcanic mud. 



Typhlapseudes, F. E. Beddard. 



Typhlapseudes, F. E. Beddard, Proc. Zool. Soc. Lond., 1886, pt. i. p. 115. 



Definition. — Body depressed, wider anteriorly, gradually narrowing towards the 

 posterior extremity ; head segment broad, about as long as the two following taken 



