84 Bulletin Vanderbilt Marine Museum, Vol. VI 



joints produced into a thin lamina with convex setose margin, 

 on the exposed inner lateral margin of these articles, simulating 

 a maxilliped. They also have a small thorn-like antrorse spine 

 arising from the inner ventral angle of the basal joint, semicon- 

 cealed in setae. The second pair of legs also has such a spine. 

 Epipodites are present only on the first, second and third pairs of 

 legs. The first three pairs of legs are chelate, successively increas- 

 ing in length by approximately the length of half the propodus 

 and entire dactyl of the respective legs. 



The first male pleopoda have a node or elbow-like process on 

 the anterior lateral side of the peduncle, which the females lack. 



This species attains a length of 130 millimeters, as recorded 

 from the "Alva" material. Dr. Alcock recorded specimens having 

 a length of five and one-half inches. Some males reach maturity 

 at a length of two inches. 



References: Penaeus sculptilis Heller, C, Verh. Zool.-Bot. 

 Ges. Wien, Bd. XII, 1862, p. 528 ; Reise Osterreich. Fregatte 

 "Novara" Crust., Th. II, Abth. 3, 1865, p. 122, pi. 11, fig. 1.— 

 MiERS, E. J., Ann. Mag. Nat. Hist., ser. 5, vol. V, 1880, p. 

 457.— de Man, J. G., Journ. Linn. Soc. Zool., vol. XXII, 1888, 

 p. 286. — Henderson, J. R., Trans. Linn. Soc. London Zool., 

 ser. 2, vol. V, 1893, p. 448. 



Parapenaeopsis sculptilis, NOBILI, G., Boll. Mus. Torino, vol. XVI, 

 no. 397, 1901, p. 2; Ibid., vol. XVIII, no. 452, 1903, p. 5.— 

 Alcock, A., Catal. Indian Decap. Crust., pt. Ill, Macrura, 

 fasc. 1, 1906, p. 37, pi. 7, fig. 22, 22a-d.— Balss, H., Beitr. 

 Naturges. Ostasiens, Abh. d. II, 1913, Kl. d. k. Akad. d. Wiss. 

 II, Suppl., Bd. X, Abh. 



(Consult Alcock, 1906, for full diagnosis and early literature.) 



Parapenaeopsis gracillima Nobili 



Plate 21 



Type : Dr. Nobili's type series came from Buntal, at the mouth 

 of the Sarawak River, Borneo, and is deposited in the Torino 

 Museum. 



Distribution : So far this species has a rather restricted dis- 

 tribution. It has been reported from Borneo (Nobili) ; Singapore 



