183 
. CRUSTACEA. 
Maiidje. 
Stimpson, 1. c.y characterizes the following new genera and spp. &c. 
Mithrax pleuracanthusj acuticorniSy and holderiy pp. 116 & 117, Florida and 
Tortugas. 
Mithracuhis ruber y Florida and Ouha, p. 118. 
Tyche emarginata (White) = Platyrhynchus trituberculatus (Deshonne & 
Schramm), redescrihed, p. 119. 
Pyromaia [? Piromaitty vox hyhrida, iQcXmB Apioinaia].' Near Microrhynchus 
(Bell) ; carapace more elongated and pear-shaped ; rostrum larger, promi- 
nent, simple j meros joint of the outer maxillipeds with an angular promi- 
nent external lobe. P. cuspidatUy S.W. of Sand Key, Florida, pp. 109 & 
110 . 
Pericei'a camptoceraj euthecUy and septemspinosay Florida, pp. 112 & 113. 
The author states that the eyes are perfectly retractile in this genus. 
Tiarinia setirostrisy Key West, p. 114. 
Scyra umhonatuy Sand Key, Florida, p. 116. 
Pisa antilocapra and^m/ow^a, Florida reefs, pp. 110& 111. 
Acanthonychid^. 
Mocosotty g. n., near Epialtus, hut with immovable eyes, as in Huenia. M, 
crehripunctatay sp. n., French Reef, Straits of Florida : id, 1. c. p. 128. 
PARTIIENOPIDiE. 
Lambrus crenulatus (Sauss.) and pmrtalesiy fratermdusy agonusy spp. nn., 
all from the Straits of Florida ; id. 1. c. pp. 129-132. 
Solenolambrusy g. n. Carapace naked, polished j the afferent channels 
distinct j meros joint of outer maxillipeds without notch. S. ty pious and 
tenellusy spp. nn.. Straits of Florida, in about 90 and 40 fathoms ; id. 1. c. pp. 
132-135. 
MesorhoeUy g. n. Carapace as in the former ; afferent channels meeting at 
the middle of the endostome ; meros joint of outer maxillipeds acutely pro- 
duced forward at its internal angle, covering the palpus. M, sexpinosuy 
[rectius sex-spinosa']y sp. n., Loggerhead Key, Straits of Florida, 11 fathoms j 
id. I c. pp. 136-137. 
Cryptopodia concavay sp. n.. Straits of Florida : id. i c. p. 137. 
Cyclometopa. 
CaNCRIDtE. 
Catpoporus, g. n. Chelipeds, when retracted, leaving a large hole between 
carpus and hand for tlie passage of water to the afferent branchial apertures. 
C. papulosusy sp. n., id. 1. c. pp. 138 & 139, Straits of Florida. 
Micropanopcy g. n. 6 teeth on the antero-lateral margin, as in Pan&peuSj 
but the 2nd tooth coalescent with the scarcely prominent angle of the orbit, 
and the posterior tooth minute j external hiatus of the orbit reduced to a 
simple emargination. Of small size, never littoral. M. seulptipesy sp. n., 
Straits of Florida, 16-68 fathoms ; id. 1. c. pp. 139 & 140. 
Chlorodius dispar, sp. n., id. 1. c. p. 140, Cuba. 
