588 



Station 45. Lat. 7° 24' S., long. 118° 15'.2 E. Depth794M. 

 Station 314. Lat. 7° 36' S., long. 117° 30.8 E. Depth 694 M. 

 Station 316. Lat. 7° 19'.4 S., long. 116° 49'.5. Depth 538 M. 



Closely related to Pent. phosphorus Alcock, but distinguished by 

 the folio wing. Lateral border of the carapace always armed with 

 17 spines, the anterior division with 5, the middle with 3, the 

 posterior with 9 ; sublateral ridge on the branchial region not quite 

 straight, but somewhat undulate and armed with 13 spines. Cara- 

 pace two thirds a telson-length shorter than abdomen. The carinae 

 of the first three abdominal terga culminate each in an acute, 

 antrorse spine; those of the Ist and 2nd sinall, equal, thatofthe 

 3rd twic^ or 3-times as long. Carina of the 4th tergum not ending 

 in an acute spine, but with obtuse anterior extremity. Carinae of 

 the 5th and 6th as in Pent. phosphorus. Abdominal terga some- 

 what uneven, tubercular, especially along the oblique grooves, that 

 are as in Pent. phosphorus. 



Outer angle of basal joint of antennular peduncle with two 

 spinelets. 



First pair of thoracic legs just as long as the body and simi- 

 lar to those of Pent. phosphorus, but the upper border of the 

 palm armed with 6 or 7 spines along its whole length. Coxae 

 of the 2nd and 3th legs armed with a strong spine. 



Length of an adult, egg-bearing feniale 134 m.m. 



3. Arctus gibberosus n. sp. 



Stat. 99. Lat. 6° 7'.5 N., long. 120° 26' E. Depth 16-23 M. 

 Station 164. Lat. 1° 42'.5 S., long. 130° 47'.5 E. Depth 32 M. 



Closely related, especially as regards the shape of its thoracic 

 legs, to A. sordidus Stimps. 



Carapace with three teeth in the middle line before the cervical 

 groove, all three obtuse, the middle one even broadly rounded; 

 behind the cervical groove a pair of two very small teeth situated 

 abreast. Squamiform promineuces ou the carapace large, those of the 



