]^40 BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



Color. — Bluish white, with flake-white ridges and tubercles; frontal 

 portion and feet flesh colored; a few blood-red spots on abdomen and 

 about bases of appendages especially of chelipeds. (Stimpson.) 



Measurements. — Male (17855), length of carapace 7.5, width 8 

 mm; female (17854), length 7.4, width 8.6 mm. 



Range. — West coast of Florida to Bahamas; 25-34 fathoms. 



Material examined. — See table 43, page 139. 



LITHADIA GRANULOSA A. Milne Edwards 



Figure 36 



Lithadia granulosa A. Milne Edwards, Bull. Mus. Comp. Zool., vol. 8, p. 22, 

 1880 (type locality, off St. Croix Island, 115 fathoms; whereabouts of type 

 unknown). — A. Milne Edwards and Bouvier, Mem. Mus. Comp. Zool., 

 vol. 27, p. 116, pi. 22, figs. 8, 9; pi. 23, figs. 3-5; pi. 24, fig. 1, 1902. 



Diagnosis. — No linear median carina of granules. Major part of 

 carapace convex; highest point a small branchial prominence either 

 side of middle and opposite widest part of carapace. A large rec- 

 tangular pterygostomian prominence, anterior margin transverse. 

 Front truncate. 



Description. — Branchial regions very large, dominating the longi- 

 tudinal rounded prominence wliich attaches the truncate front to 

 the cardiac region; they present in the forward part a little outside 

 the median Une a high pyramidal prominence; farther outward an 

 oblique but lower protuberance of the same form on the strong 

 branchial arch; its summit is advanced almost to line of lateral 

 margin. Cardiac area a roimded but very depressed pyramid, sur- 

 rounded by a narrow, shallow depression where the unevenness of 

 the granules is accented. Below the hepatic areas, Uttle prominent 

 and of small size, there is a conspicuous rectangular pterygostomian 

 projection; behind this a small subbranchial tooth. The raised line 

 of granules forming the anterolateral border is, in the hepatic region, 

 divided into two curves, which form between them a very obtuse 

 angle. Anterolateral angle of branchial region triangular and sepa- 

 rated by an arched Hne from posterolateral angle; this is rounded, 

 as are the two halves of the intestinal region. Female abdomen 

 strongly discoid, its fused segment a little wider than long; telson 

 subtriangular, margins arcuate. 



Granules of carapace depressed, unequal, confluent, forming a 

 sort of mosaic; they are also grouped in promment lines as on the 

 lateral border of hepatic region and at divers points on branchial 

 and cardiac regions. On lower surface of branchial region and on 

 sternal plastron outside the abdomen certain granules are irregularly 

 placed and protuberant above the others, giving the surface a cor- 

 roded appearance. A similar disposition occurs on the free face of 

 the abdomen, but the granules are larger and the differences of level 

 less pronounced. On the ischium of the outer maxilhpeds the 

 granules form on the median Une a strong longitudmal elevation. 



