6i 



pair bear an acute, tooth-like process internally. Last pair of thoracic legs without 

 an exopod. 



The anterior median plate of the thelycum is rounded anteriorly and distinctly grooved 

 longitudinally; the two lateral plates are quite posteriorly united with one another, being 

 separated for the rest by a Y-Iike interspace, the antero-external angles of which are rounded 

 and brown coloured. 



Section II. Apex of telson with 3 or 4 pairs of lateral marginal spines. 



22. Pcnaeopsis coiiiger (W.-Mas.), var. andamanensis (W.-Mas.). 



Metapcnaeus pliilippinensis, var. andamanensis J. Wood-Mason, in : Ann. Mag. Nat. Hist. (6) 



VIII, 1891, p. 271. 

 Peneus (Metapeneus) coniger, var. andamanensis A. Alcock, Descr. Catal. Indian Deep-Sea 



Crustacea, 1901, p. 17. 

 Metapeneus coniger, var. andamanensis A. Alcock, Catal. Indian Decap. Crust. Part III. Macrura. 



Fasc. I, Calcutta, 1906, p. 27, PI. IV, Fig. 13. 



Stat. 12. March 14. 7°I5'S., ii5°is'.6E. Bali Sea. 289 m. Mud and broken shells. 2 young 



females. 

 Stat. 15. March 15. 7°2'.6S., ii5°23'.6E. Bali Sea. 100 m. Fine coralsand. 5 young males 



and 6 young females. 

 Stat. 51. April 19. Madura-bay and other localities in the southern part of Molo-strait. 



From 54 — 90 m. Fine grey sand ; coarse sand with shells and stones. 4 very 



young specimens. 

 Stat. 254. December 10. 5°40' S., 132° 26' E. Near Kei-islands. 310 m. Fine, grey mud. 



3 adult males. 

 Stat. 302. February 2. io°27'.9S., I23°28'.7E. Between Rotti and Timor. 216 m. Sand and 



coral sand. 2 young females. 



While the three adult males from Stat. 254 certainly belong to the var. andarnanensis 

 of Pen. coniger, it is with a more or less great uncertainty that the other specimens are also 

 referred to it. Unfortunately the thelycum of the typical coniger has not been figured; it is 

 moreover still unknown whether the characters of the adult individuals exist also already in 

 the young, whether e. g. the thelycum shows the same form, the petasma the same length in 

 proportion to the length of the carapace etc. 



The three adult males from Stat. 254 are nearly of the same size: in the largest 

 specimen the carapace (rostrum included) is 35 mm. long, the abdomen 74 mm., the total 

 length 109 mm.; in the two other specimens these numbers are, in the same succession, 32 mm., 

 67 mm., 99 mm. and 31,5 mm., 63,5 mm., 95 mm. The rostrum reaches the end of the 

 antennular peduncle or to the middle of the 2>'^ article; it bears 6 teeth in addition to the 

 epigastric tooth which is very small and smaller than the teeth of the rostrum proper. The 

 inner antennular flagellum is a trifle longer than the peduncle, in the two smaller males it is 

 just as long as the latter; the distance between the conical denticle and the base of the flagellum 

 measures little more than one-sixth its length. 



The subcarinae of the 4'^^ — 6^^ abdominal terga are quite indistinct. 



61 



