104 BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



of which is very elongate. Abdomen of male very small, composed 

 of five segments, fitted into a deep opening in the sternum and not 

 encroaching on the second sternal segment. Abdomen of female 

 6-segmented and wide with parallel borders; its last segment very 

 large and advanced to the base of the chelipeds. Legs long and 

 narrow; the genital orifices of the female are sunken in the basal 

 article of the third pair of legs. 



Gulf of Mexico, West Indies, and Indo-Pacific region; in deep 

 water. 



KEY TO THE SPECIES OF THE GENUS CYCLODORIPPE 



A'. Carapace with two low median tubercles. Three elongate 



gastric elevations antennaria (p. 104) 



A^. Carapace with two median spines. 



B'. Median spines conical. A stouter spine on protogastric 



region agassizii (p. 105) 



B2. Median spines cylindrical. No spine on protogastric 



region bouvieri (p. 106) 



CYCLODORIPPE ANTENNARIA A. Milne Edwards 



Figure 24; Plate 32, Figures 1, 2 



Cyclodorippe antennaria A. Milne Edwards, Bull. Mus. Comp. Zool., vol. 8, 

 p. 25, 1880 (type localities 20, ranging from Habana to Barbados, 88 to 287 

 fathoms).— BouviEB, Bull. Soc. Philom. Paris, ser. 8, vol. 9, p. 66 [13], 1898.— 

 Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, p. 293, 1898.— A, 

 Milne Edwards and Bouvier, Mem. Mus. Comp. Zool., vol. 27, p. 99, 

 pi. 19, fig. 8, pi. 20, figs. 4-12, 1902. 



Diagnosis. — Three low longitudinal prominences on gastric region, 

 one median, the others lateral. Two low median tubercles, one 

 gastric, one cardiac. Frontal border rounded, continuing in a regu- 

 lar curve with upper border of orbit. Upper margin of orbit 

 transverse. 



Description. — Carapace subcircular, narrow behind, covered with 

 prominent, subequal granules. Furrows well marked; cardiac area 



Figure 2i.— Cyclodorippe antennaria, male (68294): Outline of carapace, X 4. 



prominent, well defined behind and on the sides, merging with the 

 posterior branchial area; in front it is completely fused with the 

 urogastric lobe. Front advanced much beyond orbital angles, de- 

 pressed on the median line, its border very finely serrulate. Post- 

 orbital angle spiniform; a small branchial spine just within the 



