410 ox THE STOMATOPODA AND MACRUKA BROUGHT BY 



23. Pulaemon weberi de Man, 1892. 



Palaemon webe7-i, de Man, in Max Weber's " Zool. Ergebnisse.," II. p. 421, PI. XXV. 

 Fig. 23 (1892). 



One young male (.5-5 mm.), agreeing closely with de Man's description of a similar 

 specimen from the East Indies, was taken in a stream near Schultze Point, New 

 Britain. In both chelae, however, the fingers are shorter than the palm, while the 

 whole body is smooth, neither carapace nor telson being " kornig rauh." 



Genus. Leander Desmarest, 1840. 



24. Leander pacificus Stimpson, 1860. 



Leander pacificus, Stimpson, Proc. Ac. N. Sci. Philad. 1860, p. 40. 

 The iifth pair of legs in the single specimen seem somewhat longer than is 

 indicated by Stimpson's description. 

 Locality, Isle of Pines. 



Genus. Palaemonopsis nov. 



There is in the collection a solitary Palaemonid for which it seems to be 

 necessary to found a new genus. The specimen in question differs from the members 

 of the genus Palaemon in the absence of a mandibular palp. From Palaemonetes it 

 differs in having on each side of the carapace one antennal spine only, and, directly 

 behind the eye, at a short distance from the edge of the carapace, a large, blunt, 

 roughly triangular process. About half of the thicker branch of the outer flagellum 

 of the first antenna is fused with the thinner branch, but the two branches are quite 

 distinctly formed down to their bases, so that the genus must be placed in the 

 present family rather than in the Pontoniidae. The slenderness of the third maxilliped 

 points to the same conclusion. 



25. Palaemonopsis willeyi sp. u., PL XXXVI. — XXXVII., Figs. 7a — 7e. 



Diagnosis : — " A Palaemonopsis with the rostrum straight, bearing six equal teeth 

 above and four teeth below, outreaching the antennular stalk but not the antennal 

 scale ; carapace bearing a single antennal spine on each side, and a large triangular 

 process behind the eye ; pterygostomial angle subrectangular ; first antenna with last 

 two joints of the stalk together shorter than first joint, and subequal ; flagella unequal, 

 the outer larger and with its two branches fused for about half the length of the 

 thicker branch ; second antenna with the stalk equal to the first two joints of the 

 antennular stalk, the scale longer than the rostrum, narrowing to the free end, which 

 is truncated and bears a triangular tooth, projecting beyond it, on the outside ; third 

 maxilliped small and slender; first pair of legs reaching the end of the antennal scale, 

 with wrist and meropodite subequal and longer than the hand ; second pair large, strong, 

 longer by the hand than the antennal scale, with short, stout wi-ist, and meropodite a little 

 longer than the palm, the fingers longer than the palm, crossing at the tip and serrate, 

 none of the joints with spines ; remaining legs fairly stout, with small, straight, slender 



