42 MR. T. BELL ON THE CRUSTACEA 
MicrorHYNCHUS DEPRESSUS. 
Tab. VIII. Fig. 2. 
Micr. testé depressd, granulaté ; rostro minuto, triangulari, integro. 
Hab. cum Micr. gibboso, ad Insulas Gallapagos dictas. 
? Mus. Soc. Zool. 
This very singular species differs greatly in general form and aspect, no less than in 
more minute detail, from the former. The carapax is much broader, suborbicular, very 
depressed, although the specimen is a female, and the regions, though sufficiently 
distinct, are but little elevated. The surface is covered with numerous minute granular 
elevations, with here and there a few larger ones. The orbits resemble those of Mier. 
gibbosus, excepting in being much larger, as are also the eyes. The rostrum is very 
small, triangular, and entire, the margins minutely granulated. 
The tooth of the basilar joint of the external antenne is incurved at the pomt. The 
internal antenne resemble those of the former species, but their cell is still more open. 
The first joint of the inner footstalk of the external pedipalps is longitudinally chan- 
nelled ; the second joint cordiform, but less deeply notched than in Micr. gibbosus. 
The sternal disc (in the female) is almost orbicular, and not nearly covered by the 
abdomen, which is five-jointed. The first joint is somewhat bell-shaped, with a long 
central tooth or spine projecting directly backwards ; the second, third and fourth, ex- 
tremely short ; and the fifth, consisting of a perfect union of the last three joints, forms 
a flat orbicular disc, having a broad, depressed, longitudinal elevation. 
The first pair of legs is, in this sex, extremely small; the arms much curved ; the 
fingers very slightly arched, and minutely toothed towards the extremity. The remain- 
ing legs are similar to those of the former species. 
Colour nearly white, but with a very slight pinkish tinge. 
Length of the carapax 6 lines ; breadth the same. 
Of this species one specimen only, a female, was procured by Mr. Cuming with the 
former. 
Genus Lizinia, Leach. 
LIBINIA ROSTRATA. 
Tab. VIII. Fig. 3. 
Lib. rostro producto, valido, bidentato, dentibus compressis, acutis, divergentibus. 
Hab. ad oras Peruvie. 
3 Mus. Soc. Zool. 
The whole of the body and legs are covered with close short hair, the surface beneatti 
the hair being minutely punctate. Carapax almost globose, the regions much elevated, 
a 
