THE GRAPSOID CRABS OF AMERICA. 



279 



Descj'iption. — Dorsal surface very uneven, covered with irregular 

 punctures, and toward the lateral borders with tubercles, a few 

 tubercles on the gastric region. Interregional grooves deep. Epi- 



FiG. 141. — Platxchirocrapsds typicds, male (19SG3), dousal view, slightly ueduced. 



gastric lobes high, granulate; between them a deep furrow runs to the 

 margin of the front. A very small protogastric lobule is situate near 

 the upper fissure of the orbit. Outer portion of branchial region 

 rather steeply inclined. 



a o 



FlO. 142. rLATYCHIROOKArSDS T^PICDS, MALE nOLOTYl'E. fl, OCTER MAXMLLIPED (HOTTED 



LINE SHOWING MEDIAN LINE), X 4 ; l>, AISDOMEN, X i-\\C, UICUT OUUITAL AND ANTEN- 

 KAL REGION, VENTRAL VIEW, X 2i. 



Front bilobed, a deep U-shaped median sinus; lobes irregular, 

 highest near the outside, margined with hornj'-tipped spinules, as are 

 also the upper margin of the orbit and the outer margin of the lateral 

 teeth. Front sej^arated from the inner border of the orbit by a 



