i5 



Length of the i st pair of legs. 



Tod 



TT TT TT * TT TT ÏJ 



rth 



TT TT TT J TT TT TT 



„ „ merus 



tt » tt carpus I 



t, » chela 



tt * » palm 



„ , fingers 



of the i s ' pair of legs 



6 



9 

 37 

 i5 



9 

 10 



5 



'3 



5*/* 



7'U 



N° 1, 3 and 4 Station 316; N° 2, 5 and 6 Station 



3. Stereomastis phosphorus (Alcock). 



Pentacheles phosphorus A. Alcock, in: Annals Mag. Natural History, Ser. 6, Vol. XIII, 1S94, 



p. 240. 

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



Calcutta, 1901, p. 168. 

 Polycheles phosphorus M. J. Rathbun, The Brachyura and Macrura of the Hawaiian Islands, 



Wash. 1906, p. S98. 

 Polycheles phosphorus S. Kemp and R. B. Seymour Sewell, in : Records Indian Museum. Vol. 



VII, Part I, N° 2, 1912, p. 24. — Illustrations Zool. Invest. Crust. 1894, PI. VIII, Fig. 2. 



Stat. 297. January 27, 1900. io°39'S., i23°4o'E. 520 m. Bottom soft, grey mud, with brown 

 upper layer. 1 young female. 



This specimen, though presenting tvvo slight differences from the quoted description, is, 

 however, referred to Stereom. phosphorus (Alcock). The anterior division of the lateral border 

 of the carapace carries 6 spines, the middle one 3, the posterior, however, 9, instead of 6 or 

 7, as usual; these 9 spines are equidistant, except the two last ones, that are a little farther 

 distant from one another. Specimens from the Hawaiian Islands presented even 10 spines behind 

 the groove (Rathbun, 1. c). The other difference is shown by the basal joint of the antennular 

 peduncle, which is armed with two spinules, instead of one; this fact, however, is probably 

 of little moment, because also one of the specimens of another species, viz. Stereom. andama- 

 netisis (Alcock), presents a similar difference from its type (page 1 9). 



For the rest the female from the east coast of the Island of Rotti apparently fully 

 agrees with the type. The sublateral carinae of the branchial regions carry 7 spines, just as 

 in the figure of the "Illustrations". The posterior border of the carapace is finely granular 

 anteriorly, apparently a juvenile feature. The carinae of the first f o u r terga culminate each 

 in an overhanging, antrorse spine; the spine of the 2 nd tergum is little longer than the i st , that 

 of the 3 rd is much longer and the 4 th spine is as long as the 3 rd . The carina of the 5 th tergum 

 ends abruptly and is emarginate. The two edges of the doublé carina on the 6 th tergum are 

 denticulate and unite posteriorly into a compressed, rather high, median crest. At either side 

 of the doublé carina one observes on the 6 th somite a few small granules. The margins of the 

 pleura are denticulate posteriorly and inferiorly and there is a spine at the anterior end of the 

 pleura of the 2 nd somite; they have the same form as in Stereo?)!, trispinosa, but they are not 



