120 MR. F. E. BEDDARD ON ISOPODA COLLECTED [Feb. 2, 



and measures 10 millim. The head terminates anteriorly in a very 

 long obtusely pointed rostrum. Eyes aro completely absent. The 

 first three segments of the thorax are, as usual, much shorter than 

 the two following. The surface of the body is smooth. The first 

 pair of thoracic appendages are operculiform and consist of five 

 joints, the second being much the most important ; the two following 

 pairs of appendages differ from the two last in being very much more 

 slender, otherwise their structure is much the same. 

 Station 76 ; 900 fathoms. 



2. Anceus gigas, n. sp. 



This large species is represented by a number of individuals both 

 male and female ; the largest specimens measure as much as 16 

 millim., the females being hardly smaller than the males. In the 

 male the anterior margin of the head is almost straight, being only 

 broken by three minnte processes, one of which is median. The 

 thoracic segments are quite like those of other species ; the lateral 

 regions of these segments are roughened, the dorsal smoother. The 

 abdominal segments are furnished with well-developed sickle-shaped 

 epimera, which instead of projecting outwards from the body are bent 

 down. The first thoracic appendages agree with those of the last 

 species in having six joints ; the remaining thoracic appendages are 

 all similar to each other. 



Kergueleu, Christmas Harbour, 120 fathoms. 



3. Anceus tuberctjlosus, n. sp. 



A second species of Anceus was obtained at Kerguelen, which 

 cannot be confounded with the preceding ; it is represented by a 

 considerable number of specimens, both males aiul females. The 

 largest male measures only 5 millim. in length. The head is pro- 

 longed in the middle line into a short rostrum, which is squarisli in 

 outline and has a semicircular notch at its extremity. The dorsal 

 surface of the head is very convex, and is covered with numerous 

 tubercles, which are especially abundant posteriorly and laterally. 

 The three anterior segments (including tlie rudimentary first free 

 segment) are similarly beset with tubercles ; the remaining segments 

 are smooth. The segments of the abdomen gradually increase in 

 length, they are furnished with well-developed sickle-shaped epimera, 

 which project outwards. The ambulatory limbs are all similar to 

 each other; the five anterior abdominal appendages are flattened and 

 smooth, without any hairs. 



Kerguelen, Christmas Harbour, 120 fathoms. Kerguelen, Royal 

 Sound, 30 fathoms. 



4. Anceus latidens, n. sp. 



A single male specimen of this species measures 2'. 5 mm. The 

 anterior margin of the head is prolonged into three short, blunt pro- 

 tuberances, of which the median one is the largest. The head and 



