47 



of which is rudimentary, on the anterior margin of the 2 nd pleura, but agrees for the rest with 

 the male from Lasikin. 



In all the specimens the two anterior spines of the antennular segment (PI. II, fig. 6) are 

 distinctly shorter than the two posterior, like in Panid. Ehrenbergi. In the specimens from 

 Réunion, described by Hoffmann, the anterior pair were larger than the posterior. The spines are 

 invariably directed outward, so that they distinctly diverge from one another; on either side of 

 the middle line the anterior spine is coalesced at its base with the posterior, but in the female 

 it is hardly the case and the left spine of the anterior pair is wanting and only represented 

 by a minute rounded tubercle. The spines of the posterior pair are, however, not coalesced at 

 their base, no more than those of the anterior, so that the two spines on the right side are 

 separated by an intervening space from those of the left. In the figure of the specimen which 

 was referred by Hoffmann to Panul. Ehrenbergi, the four spines stand much closer together 

 than in our specimens, but the figure is probably inaccurate, because the posterior pair of spines 

 appears larger than the anterior, in contrast with the description. 



In the adult male from Simalur the antennular peduncle projects by the terminal joint 

 beyond that of the outer antennae, in the younger male from Labuan Badjau only by half 

 that joint. In the largest male from West-Nias the i 5t joint of the right antennular peduncle 

 is somewhat longer than that of the left, the i st joint of the left peduncle reaches the apex 

 of the penultimate article of the antennal peduncle and the left antennular peduncle projects 

 by half the terminal joint beyond the tip of the peduncle of the outer antennae. In the second 

 male the i st joint of the right antennular peduncle appears also a little longer than that of the 

 left, but the difference is not so great and the left peduncle extends by the whole terminal 

 joint beyond that of the outer antennae. In the female the two antennular peduncles are nearly 

 equal and project by one-third or one-fourth the terminal joint beyond the tip of the antennal 

 peduncles. The distal margin of the outer side of the basal antennal article is armed with two 

 spines, of which the upper is slightly larger than the lower: in the largest male from West- 

 Nias these two spines are wanting on the left peduncle, which is, of course, an abnormality. 



The specimen from Labuan Badjau shows a very dark, green colour, the tips of the 

 spines are reddish with black points, while the pleopods are purple-coloured; the same colour 

 is presented by the adult male from Simalur, but the abdominal terga and the branchial regions 

 are red, like also the meropodites of the legs. The specimens from West-Nias are quite other- 

 wise coloured, owing probably to the different action of the spirits. They are of a beautiful red, which 

 on the sternum, the epistome and the lower side of the coxae of the thoracic legs is marbled 

 with white, while the other joints of the legs are marked with narrow, white, longitudinal lines. 

 The spines on the carapace, the antennular segment and the antennal peduncles are yellowish 

 on their distal half with their points dark-brown. 



The native name (Tapah) of the animals on the island of West-Nias is laha. 



General distribution: Gulf of Akaba (Miers); Djeddah (de Man); Coseir (Heller, 

 s. n. Pal. Ehrenbergiï)\ Red Sea (Nobili); Indian Ocean (H. Milne-Edwards) ; Agulhas Bank? 

 (Stebbing); Egmont Atoll (Chagos Archipelago) (Borradaile) ; Minikoi (Borradaile) ; Réunion 

 (A. M.-Edwards, Hoffmann (s. n. Pal. Ekretibergi)); Mauritius (Latreille, Richters); Ceylon 



