THE SPIDER CEABS OF AMERICA 489 



Di. Three teeth or spines on basal segment of antenna, viz, one at antero- 

 external angle, one behind it on margin, one small at base of movable 

 segment. 

 E^ Carapace very granulate. A slender, sharp spine at lateral angle 



of carapace branchialis, p. 502. 



W. Carapace nodose, nodules nearly smooth. A conical lobe at lateral 



angle of carapace triangulatus, p. 505. 



D2. Two teeth only on basal segment of antenna, no tooth at base of 

 movable segment. A tooth on infra-orbital margin just outside 

 antennal segment. A spine at lateral angle of carapace. Oblique 



branchial nodule divided in two interruptus, p. 504. 



C^. Oblique areoles or nodules on anterior branchial region not very prom- 

 inent. No tooth on infra-orbital margin just outside antennal seg- 

 ment. An elongate spine at antero-external angle of basal antennal 



segment, and a tubercle behind it on margin bicornutus, p. 489. 



B^. Two flattened, usually imbricated lobes on side walls of carapace, one 

 hepatic, one branchial. 

 C^ Carapace with many well marked granules; and considerably longer 

 than broad. 

 D'. Two spines at widest part of branchial region. Two large tubercles 

 on intestinal region. A marginal lobe or tubercle on the basal 

 segment of the antenna behind the antero-external spine. 



platysoma, p. 497. 



D^. Three spines at widest part of branchial region. Four large tubercles 



on intestinal region. No marginal tubercle on the basal segment 



of the antenna behind the antero-external spine, although the 



margin is thickened antillensis, p. 498. 



C*. Carapace with few granules, hairy, not much longer than broad, typically 

 with four long spines on each branchial region aculeatus, p. 500. 



ANALOGOUS SPECIES ON OPPOSITE SIDES OF THE CONTINENT 



Atlantic 



antillensis. 

 interruptus. 



Pacific 



plati/soma. 

 branchialis. 



Species on both sides of the continent : weddelli. 



MICROPHRYS BICORNUTUS (Latreille) 



Plate 175 



Pisa bicornuta Latreille, Encyc. M6th., Hist. Nat., Insectes, vol. 10, 



1825, p. 141 (type-locality, Nouvelle Hollande; type in Paris Mus.). 

 Pericera bicorna Milne Edwards, Hist. Nat. Crust., vol. 1, 1834, p. 337 



(type-locality, Antilles; type in Paris Mus.). 

 Pisa bicorna Gibbes, Proc. Amer. Assoc. Adv. Sci., vol. 3, 1850, p. 170. 

 Pericera bicormda Guerin, in La Sagra's Hist, of Cuba, 1856, p. xii. — 



VON Martens, Arch. f. Naturg., vol. 38, 1872, p. 85, pi. 4, fig. 5.— Gund- 



LACH and ToRRALBAS, An. Acad. Habana, vol. 36, 1899 (1900), p. 363, 



text-fig.; reprint, 1917, p. 20, pi. [5], fig. 11. 

 Pericera bicornis Saussure, Mem. Soc. Phys. Hist. Nat. Geneve, vol. 14, 



1858, p. 427 [12], pi. 1, fig. 3 (type-locality, Antilles; type in Geneva 



Mus.). 

 Milnia bicornuta Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860; 



p. 180. 



