614 PROCEEDINGS OF THE NATJOHAL MUSEUM. volxxi. 



146. RANDALLIA AMERICANA Rathbun. 



Ehalla americana Rathbun, Pioc. l^. S. Nat. Mus., 1893, XVI, p. 254. 

 Southern part of the Gulf of California, 9J to 26^ fathoms, stations 

 2822^ 2823, and between 2826 and 2828. 



147. RANDALLIA BULLIGERA, new species. 

 (Plate XLIV, fig. 6.) 



Large head-like tubercles; Jive posterior protuberances; margin of 

 efferent branchial channel three-lobed and produced. 



Carapace slightly longer than broad, covered except the frontal region 

 with large, smooth, rounded, bead-like tubercles of different sizes and 

 distinctly separated from one another; intervening space pubescent. 

 Intestinal region bounded by a deep suture and having on the median 

 line and a little behind the middle a larger tubercle composed of two 

 or three smaller ones. Hepatic region bounded posteriorly by a deep 

 suture; shallower and less marked sutures divide the branchial from 

 the cardiac and gastric regions. Posterior margin with two lobate pro- 

 jections; a similar projection on the posterior margin of each branchial 

 region. Of these four lobes the middle two are farther from each other 

 than they are from the lateral. Pterygostomian region with a promi- 

 nent blunt tuberculated projection. Frontal region covered with 

 depressed granules. Front moderately prominent (as in ornata), dis- 

 tinctly two-lobed. Sternum and abdomen covered with large tubercles. 

 Maxillipeds with a longitudinal row of tubercles through the middle 

 of the endognath and exognath; anterior half pubescent. Antero- 

 lateral angles of the buccal cavity produced in front of the orbital 

 margin and deeply three-lobed. Exognath not reaching beyond the 

 base of the lobes. 



Merus of chelipeds covered with large tubercles; intervening spaces 

 granulate; length about three-fourths the width of the carapace in the 

 male, one-half the width in the female; distal half slightly smaller than 

 proximal. Carpus and propodus granulate. Hands shaped much as 

 in ornata; Angers a little shorter than the outer margin of the palm. 

 Ambulatory legs granulate; dactyli with pubescent margins. 



Dimensions. — Male: Length on median line, ll.C mm.; width, ll.o mm. 

 Ovigerous female: Length, 12.8 mm.; width, 12.G mm. 



Types. — No. 21000, U.S.N.M. One male, two females. Magdalena 

 Bay, Lower California, 12 fathoms, station 2831. 



148. RANDALLIA AGARICIAS, new species. 

 (Plate XLIV, figs. 7, 7a.) 



Mushroom-like tubercles; four posterior protuberances; margin of 

 efferent branchial channel entire, not produced. 



Carapace slightly longer than broad. Posterior two-thirds convex 

 and covered with large tubercles which have slightly convex surfaces 



