:>i;<; A. E. Verrill Decapod Crustacea of 



Table of the li<-r,,i n<i,i species <>t Callinectes, 



A. Frontal teeth four, not counting inner orbitals. 



B.Intramedial gastric area broad and sln.rt: latio of length t.. bn- : ,dtli ab.nit 



1:3; male appendages not very short : tij>s crossed ........... orna 



B'. Intramedial area longer and less broad ; length t<> breadth about 1 : ',' 

 C. Male appendages very short, scarcely exceeding 3d abdominal segment. 



marginahu 

 C'. Male appendages niucli exceeding 3d abdominal segment: tips straight. 



not crossed ............................ ............ - .......... /><i,m 



A. Frontal teeth two, cot counting the inn. r nrbital> : male appendages \>-r\ 



long, about reaching end of abdomen, tips ili\ -erg ni _ .......... 



Figure 20. Male generative appendages (verges) of <'<i.'li,irrt, -s . . of E. 



(Ins; 1>. of <'. iiiin-tliiiiitiix ; ,-. of I', ,,,-itiit us ; -/. (if C. l>nti ; r, of C. 



tumidus. All these are West Indian species. After M. J. Rnthhun. 



Callinectes ornatus Ordway. Kililil,' r/,///. 



Calling-ins ornatus Ordway. Boston Join 11. Nat. Hist., vol. vii. p. ."iTi. isj;:'. 

 Smith, Crust. Brazil, these Trans., ii, p. 8, 1869 (descr. i. A. M.-Kd\v., Miss. 

 Sci. Mex., v, p. 225, 1879 (as var. of ilitinmffni*). Smith. Annual Rep. U. S. 

 Fish Comni., for 1885. ],. 2!>, 1886. Rankin. Annals N. York Acad. Sci., 

 xii. p. 520. Rathbun. The Germs Callinectes, Proc. U. S. Nat. Mus., xviii, 

 p. 356, pi. xv (general); pi. xxiv, fig. :'.. pi. xxv, fig. 2, pi. .\.\\i. Hg. 2. pi. 

 xxvii, fig. 2 (details), 1896; vol. xxi. p. 5H6 : Brach. and Ma<-r. Porto Rico, 

 p. 48, 1901 (descr.); Amer. Naturalist, xxxiv, p. 140. 



FIGURES 22<-. 2:i/-. PLATE XVII. FKJURE 1. PLATE XXI, FIGURE 2. 



This species can easily be distinguished from most of the others 



of this genus by the four prominent, frontal teeth ; those of the 



antero-lateral margins are rather long, nearly straight and acute. 



The ambulatory legs are long and slender. The carapace is convex. 



