Boone, Crustacea, Cruises of "Eagle'* and "Ara," 1921-28 59 



female chelipeds differ from the male only in length and the fact that 

 the female fingers have no gape. 



The ambulatories are subsimilar, slender, successively decreasing in 

 length posteriorly; each has the meral joint cylindrical, elongated, 

 the carpal and propodal joints together are not quite as long as the 

 merus and laterally compressed ; the propodus, which is as long as the 

 carpus, is produced to a carina on the upper or posterior margin ; the 

 dactyl is as long as the propodus but is sabre-like, tapering to an 

 acuminate point; the broad side of the dactyl is set in line with the 

 narrow carinate edge of the propodus ; the thin, laminate margins of 

 the dactyl are set with close-set setae. 



Synonymy. — Persephona orhicularis Bell, Trans. Linn. Soc. London, 

 vol. 21, p. 294, pi. 31, fig. 7, 1855. 



Genus RANUALLIA Stimpson. 

 Eandallia omata (Eandall). 



Plate 12. 



DL&.GNOSTIC CHARACTERS : Carapace orbiculate ; in the young densely 

 set with coarse, rounded granules, in older specimens less granular, 

 sometimes nearly smooth; pterygostomian region swollen, in young 

 specimens ornamented with large granules, sometimes simulating a 

 tooth, this becomes less obvious with age ; the posterior region is ele- 

 vated, ornamented with a pair of submedian spines each of which is 

 in line with the part of the sulcus circumscribing the domed intes- 

 tinal region ; outside of these is a lateral pair of tubercles which are 

 as far, or slightly more or less so, from the median tubercles than 

 these latter are from each other. Legs typically Leucosid. 



Type : Randall's type, a female, 30.5 mm. long, was taken in ''upper 

 California ' ' and is deposited in the Philadelphia Academy of Natural 

 Sciences. 



Distribution: Mendocino County, California; Magdalena Bay, 

 Lower California, and Punta Arenas, Costa Rica. 



Material examined: One young female taken at Punta Arenas, 

 Costa Rica, by the ''Ara," "William K. Vanderbilt, commanding. 



Color: Mr. Randall states that the body is variegated with san- 

 guineous spots which are confluent anteriorly ; the chelipeds are varie- 

 gated with red. 



Technical description: Carapace globular, very convex, longer 

 than wide; frontal region with a median depression, but little pro- 



