458 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



St. Johns River, opposite Palatka; January 25, 1897; W. C. 

 Kendall; 1 male (21842). 



St. Johns River, at Palatka; January 20, 1897; W. C. Kendall; 

 1 male, 4 females (22277). 



St. Johns River, near Beecher Point; March 17, 1897; W. C. 

 Kendall; 8 males, 9 females (22159). 



Border of Lake Monroe; in holes in the rocks; Lewis R. Gibbes; 

 1 male, 1 female (16158), cotypes of Panopeus wurdemannii Gibbes. 



Lake Monroe; in stomach of Bujo; Biological Survey, U. S. De- 

 partment of Agriculture; fragments, returned to sender. 



Enterprise; Lewis R, Gibbes; 2 males (16157), cotypes oi Panopeus 

 wurdemannii Gibbes. 



Sanford; April 12, 1897; W. C. Kendall; 1 male (21843). 



Indian River; February 18, 1880; R. E. Earll, U. S. Fish Com- 

 mission; 11 males, 8 females (3149). 



Shark Harbor Bay, Charlotte County; J. L. Madden; 1 female 

 (60826). 



MISSISSIPPI.— Grand Plains Bayou; AprU 19, 1897; B. W. Ever- 

 mann, U. S. Fish Commission; 1 male (22262). 



LOUISIANA.— Grand Isle; June 30, 1929; E. H. Behre; 2 males 

 (1 covered with bryozoan) (63039). 



MEXICO. — Vicinity of Pueblo Viejo, Vera Cruz, 2 kilometers S. 

 of Tampico; May 23-31, 1910; Edward Palmer; 1 female (59915) 



Genus TETRAXANTHUS Rathbun 



Tetraxanthus Rathbun, Bull. Labor. Nat. Hist. State Univ. Iowa, vol. 4, 1898 

 p. 275; type, T. hidentatus (A. Milne Edwards). 



Carapace" subquadrate, convex, not areolate; orbit as wide as half 

 the front; lateral teeth four including oobital angle; first and second 

 smaU, third and fourth more or less dentiform, blunt. Palate with 

 a ridge. Fingers long, compressed. Legs long and slender. 



Known only from the Atlantic coast of middle America. 



KEY TO THE SPECIES OF THE GENUS TETRAXANTHUS 



A^ Lateral projections of carapace shallow, not prominent. A broad lobe on 

 inner margin of wrist bidentatus, p. 458. 



A*. Third and fourth lateral teeth prominent. A blunt tooth at inner angle of 

 wrist - .rugosus, p. 459. 



TETRAXANTHUS BIDENTATUS (A. Milne Edwards) 



Plate 184 



Xanthodes bidentatus A. Milne Edwards, Crust. Reg. Mex., 1880, p. 353, pi. 53, 

 figs. 5-56 (type-locality, Grenada, 92 fathoms; type in M. C. Z.). 



Tetraxanthus bidentatus Rathbun, Bull. Labor. Nat. Hist. State Univ. Iowa, vol. 

 4, 1898, p. 275. 



Diagnosis. — Very convex. Lateral projections shallow. One lobe 

 on inner margin of carpus of cheliped. Legs smooth. 



