112 MR. F. E. BEDDARD ON ISOPODA COLLKCTED [Feb. 2, 



is similar ; the third and fourth segments have in addition another spine 

 upon each side, |)laced between and behind the two lateral spines ; 

 the margins of the epimera are prolonged into three short spines. 

 Each of the three posterior thoracic segments has two or three long 

 spines on either side ; the epimera are large and terminate in two 

 stout spines. The two anterior abdominal segments each consist of 

 two portions — a narrower anterior and a smaller posterior portion ; the 

 former is smooth, the latter beset with spines and tubercles ; on the 

 first segment are two particularly long spines, one situated close to 

 the ventral margin of the tergum, exactly above this is the other, 

 which is of equal length ; on the second segment is a lateral spine 

 of great length, but situated more dorsally ; the third segment has 

 also a pair of lateral spines. The abdominal shield has a dorsal keel 

 which is prolonged posteriorly into a curved spine. The whole of the 

 dorsal surface is covered with minute pointed tubercles ; the lateral 

 region of the abdominal shield is flattened as in A. anna, &c., and 

 terminates posteriorly on either side in a flattened triangular spine. 

 Kerguelen, Royal Sound ; 28 fathoms. 



11. Arcturus oculatus, n. sp. 



Five specimens of this small species were dredged in shallow 

 water off Melbourne, South Australia. The largest measures no 

 more than 7 millim. The most remarkable |)oint about this species, 

 and one which serves at a glance to distinguish it from any other 

 recorded species of the genus, is the elevation of the eyes on to 

 stalks as in the genus Munna. The frontal margin of the head is 

 broad and truncated ; it is not excavated as in so many other species. 

 Tiie first four thoracic segments are suberpial in length, they 

 are convex posteriorly and fiatter anteriorly ; the surface of these 

 segments is quite smooth and free from tubercles or spines ; in the 

 last three of these segments tlie epimera are furnished with a long 

 spine. The posterior thoracic segments, like the anterior, ])ossess 

 an epimeral spine ; each of these segments has also a lateral tergal 

 spine. Of the three iree abdominal segments the first and third 

 are furnished with a lateral spine on either siile, which is absent from 

 the tniddle segment. The abdominal shield is very convex, and 

 terminates in a median dorsal spine as in so many other species ; the 

 lateral margin of the caudal shield is beset with a series of somewhat 

 curved spines situated at equidistant intervals, the lateral margin 

 terminates in a longish flattened spine as in A. anna. On either 

 side of the dorsal median line is another row of spines, which run 

 from end to end of the caudal shield. 



Station 161 ; 38 fathoms. 



Family C y m or h o i d iE. 



Anuropus, nov. gen. 



Among the Isopoda dredged during the cruise of the ' Challenger,' 

 there are not many deep-sea species which present any striking 

 difierences from the Isopoda of shallow water. One of these species 



