356 



THE GENUS CALLIKECTES—M. J. RATHBUN. 



VOL. XVIII. 



CALLINECTES ORNATUS, Ordway. 

 (Plates XV; XXIV, lig. U: XXV, fig. 2; XXVI, fig. 2; XXVII, fig. 2.) 



CaUinectes ornatus, Ordway, Boston Journ. Nat. Hist., VII, p. 571, 1863. — Smith, 



Trans. Conn. Acad. Sci., II, p. 8, 1869. 

 CalUnectes ornatns, A. Milne-Edwards, Crust. Reg. Mex., p. 225, 1879 (variety 



of Callinecies diacanthus) . 



Carapace more convex than in C.sapidus; depressions shallow; length 

 of intramedial areanuichless than half its anterior width. Surface finely 

 and more evenly granulated than in C. sapidus. Frontal teeth four; 

 the two outer obtuse, margins slightly concave ; inner teeth small (Plate 

 XXIV, fig. 3). Subfrontal tooth a prominent spine. Suborbital tooth a 

 broad arcuate lobe. Lateral teeth shallow and broad; margins convex 

 at base, concave in the terminal half; jjosterior margins longer than 

 anterior ; tips acute in the first 5 or 6 teeth, acuminate in the remainder. 

 Lateral spine about two and one-half times the preceding tooth, directed 

 forward. Abdomen of male (Plate XXV, fig. 2) narrower than in C. 

 sapidtis. Penultimate segment widest at the proximal end; margins 

 slightly concave. The appendages (Plate XXVI, fig. 2) reach midway 

 of the length of the penultimate segment; proximally they curve inward 

 and touch or overlap each other; the distal portions are straight and 

 divergent. At about one millimeter from the extremity, the appendage 

 widens a little and then narrows rather abruptly to the very slender 

 tip. The abdomen of the female (Plate XXVII, fig. 2) is very broad at 

 the proximal end and tapers more rapidly to the terminal segment than 

 in any other species. 



Size. — Adult males vary in width from 4ji to if inches; adult females, 

 from 3^ to 4J inches. 



Measurements of CaUinectes ornatus. 



The localities of specimens examined are as follows: 



South Carolina: East end Sullivan's Island oyster bed, Charleston ; .Toe White- 

 side and C. C. Leslie (No. 3185, U. S. N. M.). 



Bermudas: G. B. Goode (No. 3175, U. S. N. M.); Dr. E. V. Hamlin (No. 4028, 

 U. S. N. M.). 



Elorida: Big Pine Key, H. Hemphill (No. 14889, U. S. N. M.) ; Key West, various 

 collectors; Marco, H. Hemphill (No. 18231, U. S. N. M.); Puuta Kassa, C. W. 

 Ward (No. 5753, U. S. N. M.); Bird Key, schooner Crampus (No. 15246, 

 U. S. N. M.). 



Bahamas: Andros Island and Andres Bank, in sponges (E. A. Stearns collection). 



Cozumel, shore in net; str. Albatross (No. 9557, U. S. N. M.). 



Jamaica, Dr. Smith (No. 2448, U. S. N. M.) ; str. Albatross (No. 18227, U. S. N. M.) 



