i6 



granular, though the 2 nd pleura are finely punctate before the median depression, which is bordered 

 posteriorly by the salient midrib. 



The inner border of the antepenultimate joint of the antennal peduncle is armed at its 

 far end with a small acute spine, and a still smaller one exists also at that of the 

 penultimate joint. 



As regards the i st pair of legs, it should be remarked that there is no spine on the 

 lower border of the merus, opposite the 2 nd spine of the upper border, and that not only the 

 lower, but also the upper border of the palm is finely serrated. The coxae of the 2 nd legs are 

 armed each with two juxtaposed spines, a small spinule occurs also on those of the 3 ld pair. 

 The 5 lh legs are subcheliform, the dactylus being a little longer than the immobile finger. 



Measurements in millimeters. 



Length of the body in the middle line 63 



„ „ „ carapace 28 



Distance between the tips of the spines at the antero-lateral angles. 14V2 



Greatest width in front of the cervical groove 21 



Length of the abdomen 35 



> , 6th tergum 3 3 / 4 



Distance between the antero-lateral angles of the 6 th tergum ... 7'/ 4 



Length of the legs of the i st pair 70 



->nd 2A 



Tl TT TT TT «TT* - TT -T 



-;th 16 



TT TT TT TT TT TT J TT * W 



merus --o'/ï 



carpus I l ---V2 



chela ) of the ist pair | 22l /a 



palm I I 9 1 / 



2 



„ „ fingers ) [ 13 



Geographical distribution: Andaman Sea, Bay of Bengal, Arabian Sea and Gulf 

 of Manar, in depths varying from 200 to 740 fathoms (Alcock); Hawaiian Islands (Rathbun). 



4. Stereomastis andamanensis (Alcock). (PI. I, Fig. 2 — 2 0). 



Pentacheles andamanensis A. Alcock, in : Annals Mag. Nat. Hist., Ser. 6, Vol. XIII, March 



1894, p. 239. 

 Polycheles andamanensis A. Alcock, A descriptive Catalogue of the Indian Deep-Sea Crustacea, 



Calcutta, I90i,p. 169. — Ulustrations of the Zoology of the Investigator, Crustacea, PI. X, Fig. 3. 



Stat. 18. March 18. 7°28'.2S., 1 15°24 / .6 E. 1018 m. Bottom fine grey mud. 1 young, much 

 mutilated specimen, belonging either to Stereom. phosphorns (Alcock) or to this 

 species: not determinable because the 41-- and following abdominal somites 

 are wanting. 



Stat. 48. April 13. 8°4'.7 S., u8°44'.3E. 2000 m. Bottom fine, grey mud; partially green. 

 1 young female. 



Stat. 85. June 17. o°3Ó'.5S., H9°29'.5 E. 724 m. Bottom fine, grey mud. 2 adult males. 



Stat. 137. August 3. o°23'.8N., I27°29'E. Channel between Makjan and Halmaheira. 472 m. 

 Bottom fine, dark muddy sand. 1 young male. 



Stat. 314. February 17, 1900. 7°36'S., ii7°3o'.8E. 694 m. Bottom fine, sandy mud. 1 male 

 and 1 female without eggs, both adult. 



