342 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



TEMNONOTUS SIMPLEX A. Milne Edwards 



Plate 249, figs. 10-12 



Temnonotus simplex A. Milne Edwards, Crust. R6g. Mex., 1875, p. 84, 

 pi. 17, figs. 3-3c (type-locality, near Barbados, 100 fathoms, Hassler 

 Exped.; holotype. Cat. No. 1938, M. C. Z.); Bull. Mus. Comp. Zool., 

 vol. 8, 1880, p. 2. — Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, 

 vol. 4, 1898, p. 255. — A. Milne Edwards and Bouvier, Mem. Mus. 

 Comp. Zool., vol. 47, 1923, p. 393. 



Temnonotus granulosus A. Milne Edwards, Bull. Mus. Comp. Zool., vol. 8, 

 1880, p. 2; (?) not T. granulosus A. Milne Edwards, 1875. 



Diagnosis. — Cardiac lobe convex, smooth save for one granule, and 

 with hairy margin; walls of trench not rimmed. Branchial regions 

 partly spinous. 



Description of immature male, holotype. — Carapace longer and less 

 convex than granulosus, and with fewer granules; most of these are 

 obscured by a dense coat of pubescence, except the spiniform granules, 

 which correspond in position to the enlarged granules of granulosus. 

 Rostral horns longer and slenderer; interorbital furrow not well 

 marked. Basal article of antenna narrower and bearing only one 

 small spine which is antero-external. Two lines of granules on the 

 front are continued on the gastric region; this region bears some 

 low tubercles. A rather strong spine on hepatic region. Branchio- 

 hepatic furrow wide and deep. Branchial regions armed with many 

 spines. Cardiac lobe boimded by a depression whose walls are less 

 abrupt than in granulosus, and are not margined; the enclosed lobe 

 is much swollen, its surface smooth except for one median granule 

 forward, its margin furnished with a line of small, straight and stiff 

 hairs. Above posterior margin a median spine directed backward. 

 (A. Milne Edwards, amended.) 



Measurements. — Immature male, holotype, length of carapace 12, 

 width of same 8 mm. 



Range. — Off Havana and Barbados. Depth, 100 to 200 fathoms. 



Material examined. — 



Off Havana, Cuba; Morro Castle bearing SW. by W., about 2M 

 miles; 200 fathoms; May 26, 1893; State Univ. Iowa Bahama Exped.; 

 1 male (Mus. S. U. I.).' 



Near Barbados; 100 fathoms; Hassler Exped.; 1 immature male, 

 holotype (Cat. No. 1938, M. C. Z.). 



Off Barbados; lat. 13° 03' 05" N.; long. 59° 36' 18" W.; 103 

 fathoms; Co. brk. Sh.; temp. 59.5° F.; Mar. 5, 1879; station 273, 

 U. S. C. S. S. Blalce; 1 male (Cat. No. 2853, M. C. Z.) ; identified by 

 A. Milne Edwards as granulosus. 



RemarTcs. — In the type male the posterior spine of the basal article 

 of the antenna is either broken or stunted on the right side; on the 

 left side all the spines are missing. In the Havana male the basal 

 article bears two long spines. The male from Barbados which A. 



