65 



just above the orbital margin; the epigastric tooth is as large as the i^' of the rostrum, the 

 2"^^ is a little larger, the foUowing become gradually smaller. The upper margin of the forcmost 

 tooth is one and a half as long as that of the tip, so that, Hke in the specimens observed by 

 Miss Rathbun, the rostrum appears less acuminate than in Miers' figure. Orbital tooth acute, 

 well developed; antennal spine rather large, larger than the hepatic spine. Antero-inferior angle 

 of the carapace rounded, without a tracé of a branchiostegal spine. 



Third antennular article half as long as the 2°*^, appearing distinctly longer than in 

 Fig. a of Miers' paper; in this figure a small spine directed forward and ontward at the end 

 of the outer margin of i^' antennular article is also not indicated and the eye-peduncles appear 

 in it too narrow. Antennular flagella tapering, equal, half as long as the carapace, rostrum 

 excluded ; the four flagella are curved upward near their base, but this may be accidental. 



External maxillipeds hardly reaching to the end of the carpocerite. 



First legs bispinose, the spine on the ischium minute, only perceptible by a strong 

 lens; these legs extend to the base of the antennal peduncle, chela as long as the merus, a 

 little longer than the carpus, fingers twice as long as the palm. The 3''^ legs extend to the 

 middle of the scaphocerite, the 4''^ are as long as the i^' and the s'"* legs project to the end 

 of the antennal peduncle. The measurements of the 5"' legs, the joints of which are fringed 

 with rather long hairs except the dactylus that carries 5 or 6 pairs of tufts of short setae, are 

 the foUowing: merus 2,55 mm. long, 4-times as long as wide: carpus 2,2 mm., propodus 1,3 mm. 

 long and 3-times as long as broad at its base; dactylus 1,2 mm. long, triangular, 4-times as 

 long as wide at its base. All the legs bear an exopod. 



The thelycum agrees with the figure in Miss R.a.thbun's paper. It bears anteriorly 

 not only a median acute spine, situated between the bases of the 4* legs and visible in that 

 figure, but the lateral ridges terminate also anteriorly in a small, acute spine, which was not 

 figured by her. 



This specimen has not yet attained its full size, the carapace, rostrum included, being 

 9,3 mm. long; according to Miss R.a.thbun the carapace attains the length of 12,4 mm., and 

 the total length should then be 42,8 mm. 



General distribution: Western Indian Ocean, Cerf Island (Miers) ; Hawaiian 

 Islands (Rathbun). 



f25. Penaeopsis stridttlans (W.-Mas.). 



Crotalocaris stridiilans J. Wood-Mason, MS. name. 



Metapeneus stridiilans A. Alcock, Ann. Mag. Nat. Hist. (7) XVI, 1905, p. 526 and Catal. 



Indian Decap. Crust. Part III. Macrura. Fase. I, Calcutta, 1906, p. 27, PI. V, Fig. 14, 14^ — d. 



Peneits velutiniis C. Spence Bate, Report Challenger Macrura, i88S, p. 253, PI. XXXIII, Fig. i. 



Stat. 2. March 8. 7°25'S., 113° 16' E. Madura-strait. 56 m. Grey mud with some radiolariae. 



1 male and 2 females. 



Stat. 19. March 19/21. 8°44'.s S., ii6°2'.5E. Bay of Labuan Tring, West coast of Lombok. 



18 — 27 m. River-mud, coral, coralsand. i male and i female. 

 Stat. 33. March 24/26. Bay of Pidjot, Lombok. 22 m. and less. Mud, coral and coraLsand. 



2 males and i female. 



65 



SIBOGA- EXPEDITIE XXXIX fl. g 



