0FFS1I0R15 FISHING GROUNDS OF GULF OF MEXICO. 
305 
Pachygrapsus transversus Gibbes. 
Bird Key, 4 3,29. 
Sesarma cinerea (Bose). 
Long-boat Key, 2 3,19. 
Sesarma angustipes Dana. 
Long boat Key, 5 3,9 9; Little Gasparilla, 1 3 ; Big Gasparilla, 1 3 . 
Aratus pisoni Milne-Edwards. 
Long-boat Key, 5 3,8 9; Little Gasparilla Pass, 1 3 . 
Geocarcinus lateralis Guerin. 
Loggerhead Key, 5 3,19. 
Calappa marmorata Boyd. 
Three and one-half miles west of station 5052, 1 3 . 
Calappa, sp. 
A male from station 5076 is too young to be identified. 
Cyclois bairdii Stiinpsoii (?) 
One small crab, a male, from station 5099, 21J fathoms, appears to agree in all 
particulars with Stimpson’s types of Cyclois bairdii, from Cape St. Lucas, with which 
it has been carefully compared. 'I'he Florida example is slightly smaller than the 
smallest of Dr. Stimpson’s specimens, and if any appreciable difference exists 
between the Gulf and the Pacific forms it cau not be made out with the material at 
hand. In Dr. Stimpson’s description (Notes on N. A. Crust., Ann. Lyc. Nat. Hist., 
N. Y., VII, p. 237, 1862) it is stated that the front of Cyclois bairdii is tridentate, but 
in his types, which are preserved in the National Museum, as well as in our specimen, 
the front is always iirominently bidentate. 
Iliacaiitlia subglobosa Stimpsou. 
Station 5104, 51 fathoms, 1 3 . 
Iliacaiitlia sparsa Stimpsou. 
Station 5077, 33 fathoms, 1 3 . 
Callidactylus asper Stimpsou. 
Stations 5088, 5102, 32 to 34 fathoms, 1 3,1 9 . 
Prionoplax atlanticiis, u. sp. 
Oarapax wide, nearly straight transversely, strongly convex longitudinally ; lateral 
borders straight. Unlike P. sjyinicarpus Milne-Edwards, which has its surface finely 
granulated and marked by straight deep channels, the surface of our specimen is 
smooth, shiny, and has no channels marking off the areolations. Front lamellate, 
advanced, sloping and divided into two rounded lobes by a slight notch, which in P. 
s-nnicarpus continues behind with the mesogastric groove. Antero-lateral borders 
armed with three flat, sharp teeth, one of which is at the external orbital angle, instead 
of four as in spinicarpus ; orbits large, directed forward. Eyestalks not inflated at 
base as in P. spinicarpus ; cornea large. Auteunules well developed, folded back 
transversely in a little groove, concealed for the most part behind the front and sepa- 
rated by a straight nasal lobe. The antennm are in the notch between the front and 
the suborbital border, their bases small and almost cylindrical; they touch the front 
at the internal angle. The next segments are small and cylindrical. Epistome wide 
out very short, and limited behind by a very prominent labial border; from each side 
■ C continues with a channel which follows the line of the branchiostegal suture. 
Bull. U. S. F. 0. 89 20 
