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the epigastric tooth, which is much smaller than the teeth on the middle of the rostrum. The 

 lower margin, which, in the two other specimens from this Station, ascends in a curved line to 

 the apex, appears here, as in the male from Stat. 289, very slightly concave in the middle. 

 The post-rostral ridge is distinct until to the posterior margin of the carapace, but it is rather 

 obtuse; in the two other specimens this ridge is less conspicuous. The rcstrum of the young- 

 male that reaches as far as in the female, bears 8 teeth, but the other female also 9 besides 

 the epigastric tooth. 



The petasma of the young male, long 52 mm., is already developed; the thelycum of 

 the larger female much resembles that of Trachyp. ciirvirostris, but the anterior cordiform 

 plate is comparatively larger. 



The male from Stat. 162 is 37 mm. long. The rostrum that reaches the end of the 

 i^' joint of the antennular peduncle, bears 8 teeth besides the epigastric tooth and the lower 

 margin is slightly concave as in the larger female from Stat. 51. The legs of the 5* pair reach 

 the end of the scales and the two branches of the petasma are not yet united. 



General distribution: Arafura Sea, South of Papua (Spence Bate). The specimens 

 from Yokohama referred to this species in the Challenger Report probably belong to Trachyp. 

 airvirostris (Stimps.). 



139. Trachypenaeus salaco de Man. 



Tracliypcnaens salaco J. G. de Man, in: Notes from the Leyden Museum, Vol. XXIX, 1907, p. 135. 



Stat. 205. September 20. Lohio-bay, Buton-strait. 22 m. Sandy mud. i male. 

 Stat. 258. December 12/16. Tual-anchorage, Kei-islands. 22 m. Lithothamnion; sand and coral. 

 I male. 



H.a.swell's description of Pcnaeus granulosus from Torres Strait is applicable both to 

 this species and to Trachyp. anchoralis (Sp. Bate), but without the examination of the type 

 specimens it will be impossible to decide whether one of them is identical with it or not — 

 and I therefore prefer to describe the Siboga specimens as a new species. 



The male from Stat. 205 is the larger of the two and 42 mm. long, the carapace, with 

 the rostrum, measures just one-third that length. Body more or less tomentose, especially the 

 carapace, and both carapace and abdomen are very finely scabrous, being thickly covered 

 with microscopical s p i n u 1 e s , that are somewhat larger on the abdominal terga than 

 on the carapace. The rostrum, the lower margin of which is slightly ascending, reaches just 

 beyond the i'^' joint of the antennular peduncle, not yet to the middle of the 2""^ joint; it bears 

 8 teeth in addition to the epigastric tooth that is situated at the anterior fourth of the carapace. 

 These teeth reach to the tip, become progressively smaller distally and the i"' is situated on the 

 carapace ; a line uniting the tips of the teeth runs almost horizontally. From the epigastric tooth 

 which is much smaller than the i^' rostral tooth, a distinct though obtuse ridge runs backward 

 to the posterior margin. 



Supraorbital spine small, sharp; post-antennular spine of moderate size, hepatic spine a 

 little smaller, antero-inferior angle of the carapace rectangular, obtuse; post-antennular groove 



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