164 BULLETIN 103, UNITED STATES NATIONAL MUSEUM. 



Holotype. The propodus of the right cheliped, the immovable 

 finger being broken off near its middle. 



In shape, this hand is shorter, higher, and thicker than the pre- 

 ceding. The surface, aside from the ridges and the uppermost facet 

 is covered with a fine reticulation of transverse grooves. The facets 

 are 7 in number and in position are like those of C. declivis, except- 

 ing that the narrow uppermost one which appears to belong to the 

 inner surface in C. declivis is more horizontal in C. reticulatus and 

 forms the upper surface of the segment. The next facet on the outer 

 side is narrowest at the distal end and widens to the middle, after 

 which the margins are subparallel; the next facet widens distally, 

 and the next also, but in a lesser degree : the lower facet is ill defined. 

 The 2 facets of the inner surface are subequal and widen distally. 



There is the base of a tooth at the inner distal end of the upper 

 facet, and a short blunt spine at the distal end of the crest between 

 the upper and middle facets. If there was a tooth at the proximal 

 end it is broken off. 



The propodal finger bears on its upper edge the stumps of 3 sub- 

 equal teeth; nearer the palm on the same surface there are 2 small 

 acute tubercles transversely placed, the inner one the larger. 



Aside from the difference in shape and ornamentation between this 

 species and the preceding, there is a difference in the form of the 

 facets which may be seen by comparing figures 5 to 7 with 1 to 3 on 

 plate 66. 



CALLINECTES, species. 



Plate 65, figs. 1 and i>. 



Locality. Panama Canal Zone. From the 4 feet of dark, strati- 

 fied tuff and clay immediately overlying the lower limestone bed, 

 Las Cascadas section. Upper part of Culebra formation. Oligo- 

 cene series. D. F. MacDonald and T. W. Vaughan, collectors. 

 1911. Station 60196. Cat. No. 324255, U.S.N.M. 



A specimen of a left manus and carpus, very much worn, the upper 

 and lower margins and the distal end of the manus being lacking. 

 The palm is narrower than in C. reticulatus described above; the 

 facet near the middle of the outer surface is wider than in C. declivis, 

 and widens distally instead of having subparallel margins as in that 

 species. 



CALLINECTES, species. 



Plate 65, fig. 7. 



Locality. Panama Canal Zone. From top part of limy sandstone 

 below upper conglomerate, near foot of stairs, Gaillard Cut. Upper 

 part of Culebra formation. Oligocene series. D. F. MacDonald 



