THE GRAPSOID CRABS OF AMERICA. 303 



Mobile Bay, Alabama: C. F. Baker; 1 female (21685). 



Biloxi Bay, Mississippi; C. F. Baker: 1 male. 2 females (21686). 



Oyster Bay, St. Bernard Parish, Louisiana; on muddy banks; Feb, 

 3, 1898; Fish Eaiok; 3 specimens (26139). 



Grand Isle, near New Orleans, Louisiana ; G. Kohn ; 3 specimens 

 (2258). 



Swan Lake, Gal\eston, Texas; Xov. ri-lo, 1891; B. W. Fverinann; 

 1 female (17111). 



Tampico, Mexico; live in the soft mud of the river banks; June 1, 

 1900; Edward Palmer; -t females (2 soft shell) (45795). 



SESARMA (HOLOMETOPUS) MIERSII Rathbun. 



Plate 84. 



fipHarma nngvstipcs Miers, Proc. Zuol. Soc. Tvoiulon, ISSl, j*. TO; Ttat Islnnd, 



Monte Video. Not S. ungustipes Dana. 1852. 

 Sesartna stimpsonii Miers, Challenger Rept., Zool., vol. 17, 1886, p. 270 



(type-locality. Monte Video; type in Brit. Mus.). Not S. stlinpsonii 



Miers, 1881. 

 Scsarma' (Holometopus) miersii Rathbun. Proc. Biol. Soc. Washington, 



vol. 11. 1897, pp. 90 and 91 (type-locality, Abaco. Bahamas;^ Cat. No. 



11372, U.S.N.M.). 



Diagnosis. — Little transverse. Front less than half width of cara- 

 pace. Merus of third leg less than two and one-half times as long 

 as wide. 



Description. — Carapace a little broader than long, of equal width 

 anteriorly and posteriorly. General appearance much like that of 

 S. cinereum, punctae more numerous, the anterior granulated area is 

 more extensive. 



Front less than four times as wide as high, widening a little below. 

 Of the superior frontal lobes those of the inner pair are very much 

 wider than the outer pair. 



The chelipeds differ as follows from those of S. cinereum: The arm 

 has a low subdistal tooth on its upper margin ; the laminar expansion 

 of the inner margin is widest nearer the end of the segment. The 

 palm is very coarsely granulate, being rough to the unaided eye. 



Legs wider than in S. cinereum; the merus of the third pair is 

 two and one-half or less than two and one-half times as long as wide. 



Terminal segment of male abdomen large, as wide as long; the 

 appendages of the first segment terminate in an oblique sinuous 

 margin fringed with hair. 



Measurements. — Male holotype, length of carapace 19.3, width of 

 same 21.1, superior frontal width 11 mm. 



1 On page 92, Proc. Biol. Soc. Washington, vol. 11,1 Indlcatetl Rat Island as the type- 

 locality, but the specimen there described by me should be the type. 



