114 



CRUSTACEA MALACOSTRACA. II. 



than the two foUowiug segments combined, somewhat longer than broad, at the front end half as 

 broad as a little behind the middle; the lateral margins considerably convex; the frontal process tri- 

 angular, broad and of moderate length. 



Antennulce (fig. 3b) a little shorter than the carapace, somewhat robust. First joint slightly 

 longer than the three other joints combined, more than two and a half times as long as deep and 

 with the proximal third rather expanded below. Second joint moderately produced above, conspicuously 

 more than half as long as the first and somewhat longer than third and fourth joints combined, in- 

 creasing distinctly in depth from the base to the end; third joint very short and fourth joint uncom- 

 monly short and somewhat robust; terminal setae somewhat or considerably longer than fourth joint. 

 — Antenna; long; fourth and fifth joints completeh- fused and conspicuously more than twice as long 

 as the penultimate joint. 



Chelipeds robust (fig. 3b). Basal joint long, even distinctly longer than the carpus; the posterior 

 protuberance is very deep and its free, rounded hind margin reaches the front lower angle of second 

 thoracic segment. Carpus ovate, scarcely half as long again as deep, ovate. Chela considerably longer 

 than the carpus, twice as long as broad; movable finger much shorter than the anterior margin of 

 the hand, strong, with a broad, very low, very flatly triangular protuberance on the incisive margin 

 somewhat from its base (fig. 3c) and a minute, sharp denticle at the distal end of that protuberance; 

 fixed finger very broad, with two strong setae on the posterior margin, while the incisive margin has 

 at the base a somewhat deep and moderately narrow, not crenulated incision producing a small hole 

 between the fingers when the chela is closed; beyond that incision the margin is somewhat undulate 

 to rather near the end where it has a sharp tooth and beyond this a conspicuous incision; the terminal 

 part of the finger is an oblong and somewhat curved triangle with the end acute. 



Thoracic segments (fig. 3a) increase gradually in length from the second to the fifth; the lateral 

 margins of each segment are nearly straight excepting at both ends, but the margins of seventh seg- 

 ment are somewhat convex. — Thoracic legs somewhat short. The two anterior pairs (fig. 3 b) moder- 

 ately slender, fourth joint with a rather long spine on the posterior angle; fifth joint a little longer 

 than the fourth, with the anterior distal spine long and the posterior spine much shorter; si.xth joint 

 with fine denticles along the posterior margin and on the end (fig. 3d), considerably longer than the 

 fifth and a little longer than seventh with the straight claw. Three posterior pairs moderately strong, 

 with somewhat long spines on the fourth and especially on fifth and sixth joints (fig. 3e); sixth joint 

 .somewhat longer than the fifth but much shorter than the seventh with claw, the seventh joint being 

 long but yet shorter than the verv long claw, and both are finely ciliated below. 



Abdomen somewhat shorter than the three preceding segments combined (fig. 3 a). Five anterior 

 segments short, scarcely as broad as the posterior thoracic segments, seen from the side (fig. 3f) a 

 little angularly bent at the lateral margin; the ventral side with somewhat low, rounded protuberances. 

 Pleopods very small, biramous, without setcC. Sixth segment even perceptibly longer than the sum 

 of the four preceding segments, seen from above (fig. 3 a) broader than these segments and with the 

 posterior margin and the lateral margins together evenh' curved like the greater part of a circle. — 

 Uropods a little shorter than sixth segment (fig. 3f); peduncle somewhat longer than deep; endopod 

 about twice as long as the peduncle, styliform. 



