190 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



and more oblique; (b) lateral teeth of carapace subequal, second 

 sometimes the larger and always pointing more outward than first, 

 so that the sinus between the teeth is wider than in typical dlternata. 

 where the teeth are directed forward, the second always the smaller ; 

 (c) antero-distal tooth of merus of second and third legs more pro- 

 duced and slightly acutangular, though tip obtuse; (d) propodus of 

 second leg longer and narrower than in typical, 1 : 3.9^.75, while in 

 typical, 1:3.27-4; (e) size larger. 



Variation. The characters c and d are not stable, and as to 5, 

 the teeth on opposite sides of the same specimen may be unlike. In 

 some very small specimens of both sorts the pterygostomian lobe is 

 less deflexed than in larger examples, and in consequence is more ad- 

 vanced than the inner suborbital lobe, as in the type of P. blakei. 

 There is also considerable variation in other particulars, such as 

 relative width of frontal teeth and sinuses and details of lower 

 margin of orbit. 



Measurements. Male holotype, greatest length of carapace 6.6. 

 width of same 7.6, length of second ambulatory 14; largest typical 

 female (15281), greatest length of carapace 8, width of same 8.9; 

 male, variety (49140), greatest length of carapace 11.9, width of 

 same 14.3; largest female of variety (19854), greatest length of 

 carapace 13.6, width of same 16.5 mm. 



Range. Off Cape Hatteras, North Carolina ; Gulf of Mexico, along 

 the west coast of Florida from Cape San Bias to Key West ; 4 to 60 

 fathoms. 



Material examined. See page 191. 



CYMOPOLIA ZONATA Rathbnn. 



Plate 44, fig. 3; plate 45, fig. 1. 



Cymopolia zotiata RATHBTJN, Proc. U. S. Nat. Mus., vol. 16, 1893, p. 259 

 (type-locality, Gulf of California, 40 fathoms; holotype, Cat. No. 

 17484, U.S.N.M.). 



Palicus sonatus RATHBTJN, Proc. Biol. Soc. Washington, vol. 11, 1897, p. 94; 

 Proc. U. S. Nat. Mus., vol. 21, 1898, p. 600. 



Diagnosis. Middle supra-orbital lobe obliquely truncate. A row 

 of seven linear tubercles above posterior margin. Lateral teeth not 

 projecting beyond line of carapace. 



Description. Carapace rather wide, sides distinctly convergent an- 

 teriorly; regions deeply separated, excepting the cardiac from the 

 branchial; areolae granulate, depressions nearly smooth. Median 

 sinus of front deep with end rounded, each lobe with a smaller 

 emargination. Middle supra-orbital lobe quadrilateral, obliquely 

 truncate, a narrow sinus either side; outer lobe of similar shape but 

 rounded at inner angle and separated from the exorbital tooth by a 



