144 BULLETIN 166, UNITED STATES NATIONAL IMUSEUM 



Two lobules on merus of ambulatories, and a double row of unequal, 

 denticulate teeth on carpus and propodus. 



Measurements. — Female holotype, length of carapace to tip of 

 frontal teeth 27.1, width 36.8 mm. 



Range. — West coast of Mexico. 



Material examined. — Gulf of California, Mexico: 



San Felipe; May 6-15, 1933, H. N. Lowe, 2 females (one is holo- 

 type) (67728); S. A. Glassell; 2 males (Glassell collection). 



Angeles Bay; under dense bed of sea lettuce at low tide; January 4, 

 1932; S. A. Glassell; 2 males, 1 female (Glassell collection). 



Penascosa, Sonora; February 1934; H. N. Lowe; 1 male (69400). 



SPELOEOPHORUS PONTIFER (Stimpson) 



Plate 39, Figures 1-3 



? Ebalia fossa Desbonne, MS., in Desbonne and Schramm, Crustac^s de la 



Guadeloupe, etc., p. 55, 1867 (type locality, Guadeloupe; type perhaps not 



extant) . 

 Lithadia pontifera Stimpson, Ann. Lye. Nat. Hist. New York, vol. 10, p. 115, 



1871 (type locality, Barbados; type not extant). — Rathbun, Bull. U. S. 



Fisli Comm. for 1900, vol. 20, pt. 2, p. 88, 1901. 

 Ebalia (Lithadia) cubensis von Martens, Arch, fiir Naturg., vol. 38, p. 114, 



pi. 5, fig. 9, 1872 (type locality, Bay of Rio de Janeiro; type in Berlin Mus.). 

 Spclaeophorus triangulus A. Milne Edwards, BuU. Mus. Comp. Zool., vol. 8, 



p. 23, 1880 (type localities, Charlotte Harbor and Sand Key. Fla. ; type from 



Sand Key in M. C. Z., no. 6667). — A. Milne Edwards and Bouvier, Mem. 



Mus. Comp. Zool., vol. 27, p. 120, pi. 24, figs. 3, 4, 1902. 

 Speloeophorus pontifera Hay and Shore, Bull. U. S. Bur. Fisheries, vol. 35 



(1915-16), p. 425, pi. 32, fig. 5, 1918. 



Diagnosis. — Carapace octagonal, broader than long. Two pairs 

 of orifices, one posterior partially visible from above, the other 

 smaller, dorsal, and situated at anterior angle of cardiac region. 

 Carapace highest at anterior end of branchial elevation. 



Description. — Carapace distinctly broader than long, with an 

 angular outline, the sides projecting considerably over the bases of 

 the legs. Surface covered with granules, the larger ones forming a 

 finely reticulated pattern. The lobe at the inner angle of the bran- 

 chial region is the highest part of the carapace; its summit is trans- 

 versely ridged. Side margins of carapace thick. Hepatic region 

 small and slightly elevated, with an incomplete circle of granules 

 above, and an interrupted line on outer margin. Pterygostomian 

 region prominent, with a conical downward-pointing spine, visible 

 from above. A small tooth on anterior part of anterolateral margin 

 of branchial region. Posterolateral margins rectangled, the outer 

 portions of which are subparallel but bayed inward, forming a sub- 

 acute tooth anteriorly and a rounded lobe posteriorly; the width of 

 the carapace may be greatest at one or the other of these angles. 

 Between cardiac and branchial regions on either side, a deep cavity 

 bridged over by the meeting of a projection from the cardiac region 



