THE SPIDER CRABS OF AMERICA 299 



long. 34° 50' 00" W. to 34° 53' 00" W., 30 to 350 fathoms, station. 

 122, Challenger. 



Material examined. — 



St. Thomas; 1 ovigerous female (Copenhagen Mus.). 



Barbados; May 15, 1918; Biol. Exped. State Univ. Iowa; 1 ovigerous 

 female (Mus. S. U. I.). 



Caracas Bay Curasao; from sponge; May 10, 1920; C. J. van der 

 Horst; 1 male, 1 female (Amsterdam Mus.), 1 female (55768). 



HERBSTIA TUMIDA (SUmpson) 



Plate 105, figs. 5 and 6 



Herbsiiella tumida Stimpson, Ann. Lye. Nat. Hist. N. Y., vol. 10, 1871, p, 

 95 (type-localitj^, Manzanillo, Mexico; type not extant). 



Herbstia (Herbstiella) tumida Miers, Challenger Rept., Zool., vol. 17, 1886, 

 p. 49. 



Diagnosis. — Basal article of antenna very little, if any, wider 

 posteriorly than anteriorly; a small tooth at insertion of next article; 

 antero-external spine directed strongly outward as well as forward ;^ 

 first movable article overreaches rostrum. 



Description. — Female: Body and feet pubescent. Carapace convex 

 with the regions more protuberant than in camptacantha or depressa. 

 There are indications of tubercles on the upper surface, distributed as 

 in camptacantha, but they are faint protuberances rather than 

 tubercles, except the two on the intestinal region, which are small 

 but distinctly prominent. There is a minute sharp spine at the 

 anterior end of the branchial region and one on the hepatic region. 

 On the antero-lateral margin there are no distinct spines, but the 

 rounded surface is covered with minute, sharp tubercles. On the 

 posterolateral margin about 10 minute spines, the anterior one 

 largest. Horns of rostrum small, acute, and placed close together; 

 they form less than half length of rostrum. Basal article of antennae 

 short and broad, with a sharp projection at insertion of movable part 

 of antennae; antero-external spine straight, acute and pointing 

 obliquely outward ; the other spines shorter than in the allied species. 



Merus of chelipeds armed above with 8 acute spines; carpus with 

 one minute spine above and a slight crest on outer side; hand 

 unarmed. Ambulatory legs with ten long, slender spines above and 

 2 or 3 below. (After Stimpson.) 



In a female from Gulf of California the mesogastric and cardiac 

 protuberances are high and surmounted by a strong tubercle; the 

 rostral horns are not contiguous but have a narrow interspace with 

 subparallel sides; preocular spine short, stout, suberect, not over- 

 lapping the antennal spine. Behind it are two small teeth and a 

 V-shaped sinus next the postocular tooth; on the lower margin of the 



