28 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



basal article of the outer antenna which is narrow and firmly soldered 

 anteriorly to the process of the front. The merus of the outer 

 maxillipeds is as broad as long, does not project beyond the buccal 

 cavity but fits close to its anterior edge. Legs very slender, first 

 shorter than second, second and third very long, third a little the 

 longer; fourth nearly two-thirds as long as third, its last two articles 

 broad and flat, the terminal one without midrib. 

 Contains only one species. 



BATHYNECTES SUPERBA (Costa) 



Plates 9 and 10 



Portunus superbus O. G. Costa, Fauna del Regno di Napoli, Addizioni a i Deca- 

 pod! Brachyuri, 1853 8, p. 19, pi. 7, colored (type-locality, near Naples; 

 type in Naples Mus.). — Carus, Prod. Fauna Medit., vol. 1, p. 517. 



Bathynectes longispina Stimpson, Bull. Mus. Comp. Zool., vol. 2, 1871, p. 146 

 (young male) (type-localities, off Sand Key, Key West, and American 

 Shoal, all in the Florida Straits, 100-150 fathoms; types in M.C.Z.).— A. 

 Milne Edwards, Crust. Reg. Mex.', 1879, p. 234, pi. 42, fig. 1-lc (young 

 male).— Smith, Proc. U. S. Nat. Mus., vol. 6, 1883, p. 17. 



Bathynectes brevispina Stimpson, Bull. Mus. Comp. Zool., vol. 2, 1871, p. 147 

 (female) (type-locality, off the Marquesas, Florida Straits, 107 fathoms; 

 type in M.C.Z.).— A. Milne Edwards, Crust.Reg. Me.x., 1879, p. 235. 



Thranites velox Bovallius, K. Vetensk.-Akad. Forhand., 1876 (1877), No. 9, 

 p. 60, pis. 14 and 15 (type-locality [Storeggen], northwest of Bergen, Norway, 

 150 fathoms; type in Stockholm Mus.). — G. O. Sars, Den Norske Nordhavs 

 Exped., vol. 15, Crust., pt. 2, 1886, p. 1. 



Bathynectes superba Norman, Ann. Mag. Nat. Hist., ser. 6, vol. 7, 1891, p. 274, 

 and synonymy. — A. Milne Edwards and Bouvier, Mem. Mus. Comp. 

 Zool., vol. 47, 1923, p. 311. 



Diagnosis. — Frontal teeth four. Spine at lateral angle of carapace 

 unusually long. Chelipeds spinous. Legs very long. 



Description oj adult. — Carapace covered with a close-cut pubescence 

 and dense granulation. A transverse blunt ridge connects the 

 spines at the lateral angle; a similar ridge crosses the cardiac region; 

 the antero-lateral spines increase in length from the first to the 

 last; last spine about twice as long as the next. Of the frontal 

 teeth those of the middle pair are subspiniform, more advanced 

 and much narrower than the outer teeth, which are broad and 

 triangular. Inner upper angle of orbit small, acute; sinuses short 

 and open; lower border denticulate and with a prominent inner 

 spine, and a small outer spine, below which is a deep narrow fissure, 

 and above it a broad, shallow fissure. From the base of the inner 

 spine a small projecting lobe crosses the bottom of the hiatus of the 

 orbit and reaches the basal article of the antenna. This article 

 is oblong and bears a crest or carina along the outer side, termi- 

 nating anteriorly in a slight tooth. Flagellum of outer antennae 

 more than half as long as the carapace. 



' For the dates of the various parts of Costa's work, see Sherborn, Ann. Mag. Nat. Hist., ser. 8, vol. 5, 

 1910, p. 1.32, and Index Animalium, pf. 1, 1922, p. xxxix. 



