N0.1162. BRACHYUBA COLLECTED BY THE ALBATROSS— RJTHBrN. 615 



aud are mounted ou short thickened stalks like mushrooms (Plate 

 XLIV, fig. 7a). On the anterior third there is a median ridge extend- 

 ing from the front across the gastric region; on either side is a hollow; 

 surface covered with depressed granules. Hepatic region convex; 

 pterygostomian region bluntly angular; neither is armed. Intestinal 

 region distinctly outlined. Posterior margin with two broad rounded 

 tuberculate lobes. Posterolateral margin of the branchial region 

 armed with a smaller tuberculate lobe. The front has a blunt tooth at 

 either end. Abdomen and sternum covered with bead-like tubercles. 

 The maxillipeds are covered with large and irregular tubercles. The 

 anteiior angles of the buccal cavity are about e<]ually advanced with 

 the orbital wall and are not incised as in ornata and hulUr/era. 



Chelipeds covered with tubercles similar to those of the carapace; 

 the largest ones are on the merus and the outer surface of the carpus 

 and propodus. Length of merus about the width of the carapace. The 

 dactylus is less than two-thirds the length of the outer margin of the 

 propodus. The propodus is rather narrow, its width being less than 

 half its exterior lengtli. Ambulatory legs granulate, with marginal' 

 rows of mushroom-like granules. 



Dimensions. — Male: Median length, 8.5 mm.; width, 8.3 mm. Male: 

 Median length, 9.2 mm.; width, 9 mm. Female: JVIedian length, 8.2 

 mm.; width, 8.1 mm. 



T?/iJe.s.— No. 21601, U.S.KM. Three males, two females. Off Cape 

 St. Lucas, Lower California, 31 fathoms, station 2829. 



DORIPPID.E. 



149. ETHUSA MASCARONE AMERICANA (A. Milne-Edwards). 



Ethusa mascarone Roux, Crust. Modit., 1828, page without number, pi. xviii. 

 Ethusa americanaA. Milne-Edwauds, Bull. Mas. Couip. Zool., 1880, VIII, p. 30. 



Off Cape St. Lucas, Lower California, 31 fathoms, station 2829. 



150. ETHUSA LATA Rathbun. 



Ethusa lata Rathbun, Proc. U. S. Nat. Mus., 189J5, XVI, p. 2,58. 



Panama Bay, 26 to 62 fathoms, stations 2791, 2803, 2805; southern 

 part of Gulf of California, 26.^ fatlioms, station 2823; from off Cape St. 

 Lucas to Abreojos Point, Lower California, 48 to 66 fathoms, stations 

 2830, 2833, 2834. 



151. ETHUSINA ABYSSICOLA Smith. 



Ethusina ahi/ssieola Smith, Rept. Commr. of Fish aud Fisheries for 1882, 1884, p. 

 349, [5], pi. II, ligs. 1, la. 



Off' Cape Frio, Brazil, 671 fathoms, station 2763. 



