37 



Panulirus angulatus A. Alcock and A. R. Anderson, in: Journal Asiat. Soc. Bengal, Vol. 



LXIII, Pt. II, N° 3, 1894, p. 166. 

 Panulirus angulatus A. Alcock, A descriptive Catalogue Indian Deep-Sea Crustacea, Calcutta, 



1901, p. 185. 

 Confer: W. T. Calman, in: Annals Mag. Nat. Hist. Ser. 8, Vol. III, 1909, p. 441 — 446. 

 A. GRUVEL, in: Annal. Instit. Océanogr. T. III. Fase. IV. Paris 191 1, p. 6, 7. 

 E. L. Bouvier, in: The Transact. Second Entom. Congress, 1912, p. 78 — 89. 



Stat. 38. April 1. 7°35'.4S., U7°28'.6E. Bali Sea. 521 m. Coral. n males and 12 females, 



5 of which are egg-bearing. 

 Stat. 297. January 27'h, igoo. io°39'S., i23°4o'E. Between Rotti and Timor. 520 m. Soft grey 



mud with brown upper layer. 3 niales and 2 females. 



The males are of a smaller size than the females, but this may be a fortuity and does 

 not prove that the male. is invariably smaller than the female. The largest male from the Bali 

 Sea measures 134 mm. from the frontal margin to the end of the telson and the largest male 

 from Stat. 297 is 145 mm. long; the largest female from Stat. 38 is 175 mm. long, while the 

 two females from the other Station are 122 mm. and 110 mm. long. Of the largest specimen, 

 observed by Col. Alcock, the carapace was described as being 70 mm. long, the abdomen 

 99 mm., so that the latter was not yet one and a half as long as the carapace; at the 

 beginning of the description the carapace is said to be "half a telson-length shorter than the 

 abdomen". Xow it is clear that one of these two statements is wrong, if not both, tbr the 

 telson should then have been 5S mm. long, only a little shorter than the carapace! This is, 

 however, not the case in this species, for in Bate's figure the telson appears not yet half as 

 long as the carapace and in all the specimens, collected by the "Siboga", it is little more than 

 half as long as the latter (Confer the measurements at page 42). In Bate's figure the abdomen 

 appears, however, also one and a half as long as the carapace. It is therefore remarkable 

 that in all the specimens, taken b y the Siboga Expedition, the abdomen 

 appears al most twice as long as the carapace, remarkable because they agree for 

 the rest very well with the cited descriptions and thus apparently belong to the same species. 

 As was already remarked, the telson is little more than half as long as the carapace and it 

 measures almost one-third the length of the abdomen. When we should read, however, in 

 Alcock's description "carapace half a telson-length shorter than the abdomen, the telson 

 excluded", the question is explained. 



The youngest specimen, a female from Stat. 38, long 52 mm., is still one and a half 

 as long as that which was collected by the "Challenger". The carapace is 18,5 mm. long, the 

 abdomen 33,5 mm., the telson 11,5 mm.: the abdomen appears comparatively somewhat shorter 

 than in the adult species, but the difference is slight. The anterior margin of the carapace 

 bears in the middle line, between the large supra-orbital teeth, a very small, conical 

 tooth, that is slightly directed upward. This fact is of great importance, for this tooth 

 represents the rostrum, which constantly occurs in Palinurus s. s. and in Jasus Parker. On 

 each side of this median tooth the anterior margin bears a few still smaller teeth, situated close 

 together at the base of the supra-orbital teeth, on the right side 2, on the left 3. In the 

 "Challenger" type 110 teeth did occur between the supra-orbital teeth on the frontal margin 

 and Col. Alcock does also not describe them. 



