156 Bulletin Vanderbilt Marine Museum, Vol. VI 



two-thirds the length of the entire body. Those of the male are 

 subcylindrical ; the ischium, merus, carpus, propodus and dactyli 

 are beset with coarse, broad-based, prickly spines, which along 

 the joints and on the upper and lower lateral margins are stronger, 

 being more abundant here and sharper. The spines are much 

 weaker on the fixed finger and are reduced to rough denticles on 

 the movable finger, which has a dense, short, coarse pilosity. The 

 carpus is clavate, as wide distally as the palm, which is of uni- 

 form width. The fingers are two-thirds as long as the related 

 palm, very tapered, the upper one being slightly the thicker, but 

 superficially appearing more so, because of its pilosity, the tip 

 is very curved, the apex only touching upon the less curved but 

 acuminate tip of the lower finger. The lower finger bears two or 

 three small, triangular teeth, and following these but set well 

 apart is a large, triangular tooth. The upper finger has two such 

 large teeth, one on either side of and well separated from the 

 opposed tooth of the lower finger. In the adult female, the cheli- 

 peds are weaker, the inequality between the fingers and related 

 propodi is less and the small spines are weaker. 



The third pair of legs is greatly reduced, but are somewhat 

 longer than the first pair. 



The fourth and fifth pairs of legs are slender, monodactylar. 



References: Palaemon carcinus, Rumphius, G., D'Amboinsche 

 Rariteitkamer, 1741, pi. 1, fig. B. — Herbst, J. F. W., Naturg. 

 Krabben u. Krebse, Bd. II, tab. 28, fig. 1, 1796. — Fabricius, 

 J., Ent. Syst. Suppl., 1798, p. 402.— Edwards, H. M., Hist. 

 Nat. Crust., t. II, 1837, p. 395.— VoN Martens, E., Arch, 

 f. Naturg., Bd. V, 1868, p. 35. — MiERS, E. J., Ann. Mag. Nat. 

 Hist., ser. 5, vol. V, 1880, p. 382. — DE Man, J. G., Journ. 

 Linn. Soc. London, vol. XXII, p. 280; also in Weber's Zool. 

 Ergebn. Reise Niederl. Ost.-Ind., Bd. II, 1892, p. 421.— Hen- 

 derson, J. R., Trans. Linn. Soc. London, Zool., vol. V, 1893, 

 p. 411. — DE Man, J. G., Senck. Naturf. Gesell. Frankfurt, 

 Bd. XXV, 1900-03.— Henderson, J. R., and Mathai, G., Rec. 

 Indian Mus., vol. V, 1910, p. 281, pi. 15, figs, la-g (gives 

 excellent synoptic description). — de Man, J. G., Recherches 

 sur I'Hist. Nat. del I'lnd.-Chine, orientale par Auguste Pavie, 

 t. Ill, 1914, p. 312, Paris.— CowLES, R. D., Philippine Journ. 

 Sci., vol. IX, sec. D, Biology, 1914, p. 324, pi. 1, figs. 1 and 



