THE SPIDER CRABS OF AMERICA • 303 



Genus MICROPISA Stimpson 



Micropisa Stimpson, Proc. Acad. Nat. Sci. Philadelphia, vol. 9, 1857, 



p. 217; type, M. ovata Stimpson; Smithson. Misc. Coll., vol. 49, 1907, 



p. 10. 

 Phycodes A. Milne Edwards, Rev. et Mag. de Zool., ser. 2, vol. 21, 1869, 



p. 374; tjpe, P. antennarins A. Milne Edwards. Not Phycodes Guen6e, 



1852 (Lepidoptera). 

 Apiomithrax Rathbun, Proc. Biol. Soc. Washington, vol. 11, 1897, p. 164; 



type, A. antennarius (A. Milne Edwards). 



Carapace broad across the branchial regions, suboval, little convex, 

 more or less spinous, front between the eyes narrow, rostrum short, 

 bifid. Preorbital spine present or absent; a supraorbital fissure and 

 an exorbital tooth present; orbits open below. Eyes retractile but 

 not concealed. Basal article of external antennae armed with a 

 tooth or spine at its external angle; movable portion visible from 

 above. Fingers of adult male touching only at the extremities. 



Brazil; West Africa; Cape Verde Islands. Shallow water; 30-180 

 meters (16-98 fathoms). 



• MICROPISA VIOLACEA A. Milne Edwards 



Plate 101; plate 241, figs. 5-8 



Micropisa violacea A. Milne Edwards, Nouv. Arch. Mus. Hist. Nat., Paris, 

 vol. 4, 1868, p. 50, pi. 16, figs. 3-6 (type-locality, Cape St. Vincent, Cape 

 Verde Islands; holotype in Paris Mus.). — A. Milne Edwards and 

 BouviER, Brach. Travailleur et Talisman, 1900, p. 130. 



Phycodes antennarius A. Milne Edwards, Rev. et Mag. de Zool., ser. 2, 

 vol. 21, 1869, p. 374. 



Herbstia violacea Miers, Ann. Mag. Nat. Hist., ser. 5, vol. 8, 1881, p. 206; 

 Challenger Rept., Zool., vol. 17, 1886, p. 50. 



Diagnosis. — No preocular spine. Marginal spines numerous. 

 Antero-external spine of basal antennal article directed outward and 

 visible from above. Merus and carpus of cheliped nearly smooth. 



Description. — -Carapace almost as wide as long, covered, as are 

 also the legs and the lower surface of the body with a brown, rather 

 dense velvet. Rostrum divided half way by two short, straight, 

 divergent horns. Orbit large, its supraocular eave little projecting 

 and bearing at its posterior end a sharp spine directed outward and 

 separated by a narrow fissure from the large postorbital spine. This 

 last points forward and has at its inner base a small spine directed 

 obliquely inward and forward. Infra-orbital border with a deep 

 sinus, along the inner side of which there lies a small, blunt, non- 

 projecting tooth. Basal article of antenna armed with two anterior 

 spines, the outer one visible from above, the inner one partially 

 concealed by the following article. Antero-lateral margin armed 

 with one hepatic spine, three small and three large branchial spines 

 alternating, the last of which forms the lateral angle of the carapace, 

 and is followed by a small postero-lateral spine. Above the posterior 



