NO. 1162. BRA CHYUBA COLLECTED B Y THE A LB A TBOSS—RA THB UN. 511 



referred by me to M. eutheca} The true 71/. eutlieca (Stimpson) is, I 

 believe, distinct from M. eoncavum.^ 



35. STENOCIONOPS CONTIGUA Rathbun. 



Pericera contigua Rathbun, Proc. U. S. Nat. Mus., 1892, XV, p. 247, pi. xxxii, 

 Hg. 2. 

 Soutlieni part of Gulf of California, 8 to 10 fathoms, stations 28134, 

 2826, 2827, and 2828. 



36. STENOCIONOPS TRIANGULATA Rathbun. 



Pericera trianyulata Rathbun, Proc. U. S. Nat. Mus., 1892, XV, p. 24H, pi. xxxii, 

 fig.l. 



Panama Bay, 51^ fathoms, station 2805; off Abreojos Point, Lower 

 California, 48 fathoms, station 2834. 



37. MICROPHRYS BICORNUTUS (Latreille). 



Pisa hicornuta Latreillk, Eucyc, Mcth., Hist. Nat., Entom., 1825, X, p. 141. 

 Microphrys hlcoriiutiis A. Milne-Edwards, Nouv. Arcliiv. Mus. Hist. Nat. Paris, 

 1872, VIII, p. 247. 



Abrolhos Islands, Brazil. 



38. MICROPHRYS BRANCHIALIS, new species. 

 (Plato XLI, fig. 5.) 

 Microphrys, species, Rathbun, Proc. U. S. Nat. Mus., 1892, XV, p. 254. 



Postero -lateral angle with one spine ; antero-lateral margin unarmed; 

 anterior branchial region sicollen. 



Carapace triangular. Anterior portion of the branchial region cov- 

 ered by an oblique oblong protuberance, highest in its i)Osterior portion, 

 sloping gradually downward anteriorly and covered with tubercles. 

 Gastric region with three tubercles on the median line, a cluster of 

 three on each side anteriorly, and a transverse row at the posterior end. 

 One tubercle on the geiiital region; ten on the cardiac, of which two 

 are median. Posterior branchial region with several tubercles, the 

 chief of which are arranged in two longitudinal rows; j^ostero-lateral 

 angle with a spine curving upward. A row of blunt tubercles above 

 the posterior margin. -Margin of the hepatic region with only a small 

 tubercle; vertical side of the branchial region with scattered tubercles, 

 and two lines of tubercles continued to the pterygostomian region. 

 Anterior and lateral regions hairy. Eostrum defiexed, with two flat- 

 tened, triangular, acute horns, pointing directly forward, and separated 

 by a V-shaped sinus reaching one-half the length of the rostrum. Pre- 

 orbital tooth blunt, denticulate. Two superior orbital fissures on either 

 side of a rounded lobe; postorbital tooth blunt. The basal antennal 

 joint bears at its antero-lateral angle a long, broad, blunt spine or 



1 Proc. U. 8. Nat. Mus., 1892, XV, p. 251. 



3 Bull. Labor. Nat. Hist. State Univ. Iowa, 1898, IV, p. 257. 



Proc. N. M. vol. xxi 37 



