15 Crust. 
CRUSTACEA. 
almost obsolete. Second joint of antennje enlarged. Fingers 
slightly excavated at the tips. Othonia* (Bell). 
Sub-family 3. — Mithracincc. Carapace broadly triangular, rostrum 
short or obsolete. Second joint of antennas not dilated. Fingers 
excavate at the tips. Nemausa (A. M.-Edw.), Parathoe (n.), 
Thoe (Bell) = Platypus (Lock.), Miihrax^ (Leach), including 
Mithracidus (White). 
Family 4. — PAUTiiKNoriDyn. Orbits small and well defined. Antennae 
very slender, their basal joint very small, not reaching the front, the 
next joint occupying the narrow hiatus between the front and the 
inner orbital angle. 
Sub-family 1. — Parthenopinod. Rostrum simple, anterior legs greatly 
developed ; a marked depression between the branchial, cardial, 
and gastric regions. Lambrus* (Leach), Parthenope (Fab.), 
Solenolamhrus (Stimps.), Mesorrhoea (Stimps,), Cryptopodia 
(M.-E.), Heterocrypta (Stimps.), (Ethra (Leach). But EarynO' 
lambrus belongs to the Cancridai. 
Sub-family 2. — Eumedonince. Carapace rhomboidal or subpentagonal, 
rostrum bifid, anterior legs of moderate length. Zebrida 
(White), Eumedonus (M.-E), Gonatonotus (Wh.), Ceratocarcinus 
(Wh.), Harrovian (Wh.). 
The frontal region of the genera marked with * is figured on pis, xii . 
& xiii. 
iNACHIDiE. 
Stenorrhynchus hrevirostris, Port Jackson, and Jissifrons, New Zealand, 
spp. nn., Haswell, P. Linn. Soc. N. S. W. iii. pp. 404 & 408. 
Achceus spinosus and tuberculatus^ spp. nn., Miers, P. Z. S. 1879, p. 26, 
Japan. 
Podochela spatulifrons, sp. n., macrodera (Say), grossipes, gracilipes, 
and ruesii (Stimps.), West Indies and Florida, A. Milne-Edwards, Crust. 
Mexic. V. pp. 190-193, pi. xxxiv. figs. 1-4, and pi. xxxv. fig. 1. 
AnisonotuSy g. n., distinct from Podochela by the long curved rostrum, 
the very prominent post-orbital angles, and the simple ambulatory legs. 
A. curvirostrisy sp. n., Barbadoes, 100-123 fath. Id. 1. c. pp. 195-197, 
pi. xxxvi. fig. 3. 
Apocremnus [|1 Fieber Hemipteray 1858], g. n. Orbits as in Achceus y 
tarsi falciform as in Collodes \ A. septem-spinosus, sp. n., id. 1. c. p. 185, 
pi. xxxv. fig. 5, Florida Straits, 37 fath. 
Eucinetops ? stimpsoniy sp. n,, Miers, Ann. N. H. (5) iv. p. 3, N.E. Aus- 
tralia. 
Achceopsis guentheriy sp. n., id. 1. c. p. 2, pi. iv. fig. 1, Cape of Good 
Hope. 
Inachoides forceps and obtusuSy spp. nn., Guiana and Guadelupe, A. 
Milne-Edwards, 1. c. p. 199, pi. xxxiii. figs. 3 & 4. 
Pleistacantha [^Plist-'], g. n. Rostrum, orbital and antennal region as 
in Oregouia'y but carapace convex and spinoso, and logs greatly cion- 
