46 MR. T. BELL ON THE CRUSTACEA 
sides of the rostrum; the basilar joint reaching to about half its length, almost wholly 
exposed above, slightly tapering towards its extremity, where there is a small external 
tooth ; the moveable portion setaceous, extending a little beyond the apex of the rostrum, 
the second and third joints cylindrical, and much larger than the terminal portion. 
External pedipalps with the external footstalks semifusiform ; the first joint of the in- 
ternal footstalk elongate, rhomboid ; the second joint of an irregular four-sided figure, 
the margins entire. 
Abdomen in the male seven-jointed, the joints becoming gradually smaller from the 
third to the last. 
Anterior feet longer than the body; the arm three-sided, having a toothed carina 
above, and two carine beneath, the outer of which is minutely serrated; the hands 
slightly compressed, smooth: the fingers, when closed, in contact throughout their 
whole length, the half towards the apex being serrated, and a tubercle of the immove- 
able finger received into a corresponding excavation in the moveable one. The re- 
maining feet compressed, carinated and hairy above, the second pair longer than the 
first, the rest becoming gradually shorter. 
Length 4 lines ; breadth 21 lines. 
A single male specimen was taken by Mr. Cuming from sandy mud, at the depth of 
six fathoms. 
Genus Hersstia, Edw. 
The genus Herbstia was formed by Dr. Milne Edwards on the characters offered by 
Cancer condyliatus of Herbst, and named in honour of that indefatigable carcinologist. 
That species, which is a native of the Mediterranean, has been successively placed in 
the genera Inachus, Maia and Mithraz, by Fabricius, Latreille, and M. Risso, and very 
properly separated from these by the acute naturalist above mentioned. The correct- 
ness of this separation receives an interesting confirmation in the discovery of the 
present species, which may, with peculiar propriety, be dedicated to him who first distin- 
guished the characters of the genus. 
Hersstia EpwarDsit. 
Tab. IX. Fig. 3. 
Herbst. pedum pare antico erm. 
Hab. ad Insulas Gallapagos dictas. 
3 Mus. Soc. Zool.— ? Mus. Bell. 
The carapax is depressed, much rounded, the post-frontal portion being nearly of a 
circular form, but rather narrowed forwards. The surface is minutely punctated. The 
gastric region has four small tubercles placed transversely, and there are several similar 
ones on other parts, particularly on the branchial regions and the lateral margin. The 
front is moderately prominent, the rostrum very small, bifid, the horns being pointed 
