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



region is straight. The epimera are fused with the tergum in the 

 first thoracic segment, elsewhere distinct but small. The abdominal 

 sliield is as long as the three last segments of the tliorax ; it is 

 subquadrangular in outline. The antennules have four basal joints 

 and a long flagellum, longer than the peduncle. The anteniuB are 

 furnished with a rudimentary exopodite. Tlie mandibles have a palp. 

 The first pair of thoracic limbs are extremely long and prehensile ; 

 the remaining thoracic limbs are slender and short, they terminate in 

 two claws. The wopoda are biraraose, the endopodite and exopodite 

 being equal. 



Station 320 ; 600 fathoms. 



loLANTHE, nov. gen. 



This genus appears to be closely allied to Aianthoniscus, Sars, 

 with which it agrees in the absence of eyes and in the presence of long 

 spiny epimera and long dorsal spines, and in the shape of the uropoda. 

 It differs in that the thoracic appendages are biunguiculate and in a 

 number of other points, which may be gathered from the following 

 description of the single species referable to the genus. 



1. loLANTHE ACANTHONOTUS, H. Sp. 



This species is founded on a single female dredged in deep water 

 in the Antarctic Ocean. It measures 24 millim. in length. 



The head is as wide as the succeeding segment of the thorax ; its 

 margins are prolonged on either side into two spines, of which the 

 anterior is much the longest ; the anterior margin of the head is 

 produced into a long rostral spine, which is curved slightly upwards. 

 There is no trace of eyes. The thoracic segments are subeqnal in 

 antero-posterior diameter ; in the dorsal-median line of all the 

 segments is a stout long vertical spine ; the lateral margin of the 

 first segment is furnished with a long spiny process ; on each of the 

 three succeeding segments are two such spines, the anterior being 

 the longer ; in the remaining segments only the anterior spine is 

 present. These spines are not outgrowths of the epimera, which are 

 small and he beneath them. The abdominal shield is almost circular 

 in form ; on either side are three spines arranged at equal distances, 

 which are much shorter than the lateral spines of the thorax. The 

 antennules have a four-jointed peduncle, of which the second joint is 

 the longest. The flagellum consists of 24 joints, and is about as long as 

 the three distal joints of the peduncle. The antennoe are half the 

 length of the body ; the second joint of the peduncle has a spiny 

 process on the outer side as in lanthe, which corresponds (?) to the 

 exopodite ; the flagellum is nearly as long as the peduncle. The 

 mandibles have a palp. The thoracic a[ipendages are all similar to 

 each other and terminate in two claws. The ■uropoda have a very 

 long proximal joint ; the endopodite is extremely short, though larger 

 than the minute exopodite. 



Station 153; 10/5 fathoms. 



