504 BULLETIX lEO'^ UNITED STATES NATIONAL MUSEUM 



First leg reaches middle of palm in male, to end of chelipeds in female; 

 merus of legs armed with spines and tubercles on superior and outer 

 surfaces; carpus with two or three spines; margins of legs hauy. 



Variations. — -Varies in the number of tubercles, length of postero- 

 lateral spine, prominence of oblong branchial protuberance, length 

 of rostral horns and antero-external spine of basal joint of antenna. 



Measurements. — Male, holotype, entire length of carapace 15.3, 

 width of same including spines 14, excluding spines 11.8 mm. 



Range. — From Abreojos Point, Lower California to Gulf of Cali- 

 fornia. Depth, 12 to 48 fathoms. 



Material examined. — See table, page 503. 



MICROPHRYS INTERRUPTUS Rathbun 



Plate 174, figs. 1-3 



Microphrys inierruptus Rathbun, Proc. Biol. Soc. Washington, vol. 3-3, 

 1920, p. 24 (type-locality, Ensenada de Cajon, off Cape San Antonio, 

 Cuba; holotype, Cat. No. 4S753, U.S.N.M.); Univ. Iowa Studies in Nat. 

 Hist., vol. 9, 1921, p. 86, pi. 2, fig. 5. 



Diagnosis.— A broken, oblique ridge on branchial region. Two 

 marginal teeth or spines on basal segment of antenna. Legs un- 

 armed. 



Description. — Carapace very uneven. The branchial region bears 

 a high, oblique elevation, which in this species is in two parts, the 

 anterior part elongate and bilobed at summit, the posterior part 

 small and conical; in the same line is the stout, curved, sharp-tipped 

 spine at the lateral angle of the carapace. Transversely inward 

 from this spine is a shorter, conical, blunt spine or tubercle; on 

 either side of the cardiac region an areole bearing a few granules; 

 the small and finely granulated areole at the inner angle of the 

 branchial region is depressed. The mesogastric region is for the 

 most part elevated and nodulous; near its anterior end there is a 

 tubercle which is one of five forming a transverse ciu-ve across the 

 gastric region. Cardiac region nodulose. Besides a short submar- 

 ginal row of granules above each postero-lateral margin, there is a 

 row of four tubercles arched upwards above the posterior margin, 

 and underneath the arch, two smaller tubercles side by side. A few 

 granules on the vertical slope of the hepatic and branchial regions. 



Carapace wider than usual anteriorly, the orbits being more 

 tubular. Preorbital tooth not produced, tip tuberculiform. Rostral 

 horns flat and sharp, their outer margins parallel. Spine of basal 

 antennal segment very short, broad, flat, curved, blim.t, and pro- 

 jecting obliquely outward rather than forward; it is followed by a 



