REPORT ON THE BRACHYURA. 
87 
culated (the chelipedes considerably enlarged) ; Mithraculus, White, % Teleophrys, 
Stimpson. 
The following species have been referred to this section or subgenus : — 
Mithrax coronatus (Herbst). Central America; West Indies (to 30 fathoms); 
Brazil. 
Mithrax sculptus, Lamarck ( = Mithrax minutus, Saussure). West Indies; 
Fernando Noronha (7 to 20 fathoms). 
Mithrax nodosus, Bell. Galapagos Islands ; Chili (Brit. Mus.). 
Mithrax denticulatus, Bell. Galapagos Island ; California ; Cape St. Lucas ; 
Guyacpiil (Brit. Mus.). 
Mithrax forceps, A. Milne Edwards. Guiana; West Indies ; Bermuda; Bahia; 
Fernando Noronha? 
Mithrax nudus, A. Milne Edwards. Guadeloupe. 
Mithrax rubei, A. Milne Edwards. Cuba. 
Mithrax cinctimanus, Stimpson ( = Mithrax affinis, Desbonne and Schramm). 
Gulf of Mexico ; Florida Straits; West Indies (to 37 fathoms). 
Mithrax areolatus, Lockington. Gulf of California. 
Mithrax hirsutipes, Kingsley. Key-West. 
? Mithrax cristulipes (Stimpson). California ; Cape St. Lucas ; Bay of Panama. 
Mithrax cornutus, cle Saussure. 
Mithrax cornutus , de Saussure, Rev. et Mag. Zool., ser. 2, vol. ix. p. 501, 1857 ; Mem. Soc. 
Pbys. d, Geneve., vol. xiv. pt. 2, p. 423, 1858. 
,, „ A. Milne Edwards, Crust, in Miss. Sci. au M4xique, pt. 5, vol. i. p. 97, 
pi. xxii., 1875. 
Four males of rather small size were obtained in shallow water at Bahia. I subjoin 
the dimensions of the largest and smallest specimens : — 
a. ( $ adult, but not fully grown). This specimen nearly resembles A. Milne 
Edwards’ fine delineation of the large adult male, but the spines of the carapace and 
limbs are less prominent ; there are two, not four teeth on the upper orbital margins, and 
the tubercles of the upper margin of the palms of the chelipedes do not extend quite so 
far toward its distal extremity. 
$. 
Lines. 
Millims. 
Length of carapace to base of rostrum, nearly 
13 
27 
Length of a rostral spine, nearly . ... 
2 
4 
Greatest breadth of a carapace, nearly 
12 
25 
Length of a chelipede, .... 
20| 
43-5 
b. ($ young). In this example the palms of the chelipedes are slender, smooth, 
nearly devoid of tubercles on their upper margins : — 
