12 STOLICZKA :— TERTIARY 



Carapace convex, transversally broadly ovate, about one-fourth broader than 

 long, broadest near the front, narrower in the branchial regions, and very much 

 contracted near the tail. Upper surface smooth, subhepatic region very minutely 

 punctated, pleural region almost equally minutely granulate. Of the different 

 lobes of the carapace, only the two small, rounded, frontal lobes are tolerably well 

 defined; a semilunar, scrobiculate, depressed groove runs on either side of the 

 urogastric lobe, and a slight depression separates the cardiac from the posterior 

 branchial region, which is conspicuously convex. Eront bent downwards, its margin 

 greatly thickened, separated from the frontal face by a shallow groove, which 

 continues also above the thickened edge of the orbits ; the breadth of the front 

 edge equals that of the two orbits together ; it is four-lobed, possessing two larger 

 median lobes, and two smaller at the inner angles of the orbit, each sharply pro- 

 jecting interiorly. Orbits roundly oval, the upper edge entire, internally near the 

 middle with a sharp ridge ; lower edge with a- smaller tubercle near the outer 

 orbital one and a larger at the inner angle, followed again by a very small tubercle 

 at the edge of the orbital hiatus. Antero-lateral margin about equal in length 

 to three diameters of one orbit, obtusely angular at the edge, with four unequal 

 tubercles, — the outer orbital rounded, the next small and obtuse, the third also 

 small, but pointed, the fourth largest, also pointed, and directed outwardly forward. 

 Postero-lateral margin smooth, rounded, about the last fourth of its length rapidly 

 contracted, and the last fifth of its length distinctly iasinuated for the insertion 

 of the last ambulatory pair of feet. This insinuation greatly resembles that 

 of Carcmus, and is very rarely equally well marked in other cancesid^, but it 

 is characteristic for all postunid^. 



The basilar joint of antennulae is transversally much elongated, with a narrow 

 long pit above it, communicating by a groove with the orbit, the inter-antennulary 

 ridge sharp, prominent. The basilary joint of the antennae must be very small, 

 seated in a narrow depression between the antennulary joint and the depressed 

 auditory tubercle ; it is not externally visible ; the eye-peduncle is thick and fills 

 up from internally the greater part of the orbital hiatus. Epistome fully as long 

 as the frontal margin, with a slight longitudinal groove; the ends sHghtly wider; 

 in the middle with an angular projection opposite the inter-antennulary ridge, 

 but separated from it by a depression. 



The outer maxillipeds are of great length ; the upper end of the basipodite 

 has a convex surface, with a longer, slightly concave, upper, and a narrower, 

 almost vertical, antero-lateral edge, — the former for the insertion of the exopodite, 

 the latter for the endopodite. The first triangular endopodite is not quite 

 separated from the next ; the second has a very distinct, slightly oblique, nearly 

 median, longitudinal furrow ; and another less distinct one along the inner edge, 

 which is (at least partially) dentate. The corresponding second exopodite is appa- 

 rently a little longer, but scarcely of half the width of the endopodite ; third endopo- 

 dite subquadrangular, its length equal to half of that of the two previous joints; 

 inner edge with an obtuse projecting angle near the middle, the upper slope serving 

 for the attachment of the remaining three endopodites ; the lower inner edge is 



