FOSSIL DECAPOD CRUSTACEANS FROM MEXICO 



By Mart J. Rathbun 



Associate in Zoology, United States National Museum 



The collection here described was, with one exception, given to 

 the United States National Museum by the Aguila Oil Co. of 

 Tampico, It represents two different faunas, one from eastern 

 Mexico obtained by Dr. T. W. Vaughan (unless otherwise noted) and 

 the other from Lower California collected by Dr. W. S. W. Kew. 

 The former has affinities with the faunas of the southern United 

 States, the West Indies, and Panama ; the latter has, so far as species 

 go, a fauna of its own. 



Species from eaistern Mexico 



Harpactocarcinus americanus Rathbun Eocene. 



Xanthosia amerlcana, new species Oligoceae. 



Scylla costata Rathbun Miocene or Oligocene. 



PodophtJiabnus ( ?), species Cretaceous. 



Calappa surcheri Bouvier„ Oligocene. 



Calappa -flainmea (Herbst) Oligocene. 



Raninoides mexicanus, new species 1 Miocene. 



Calllanassa pellucida Rathbun Miocene. 



CaUlanassa pustulata Withers Eocene. 



Species from Loiver California 



'Lohonotus mexicanus, new species Eocene. 



Montezumella tubulata, new genus and species Eocene. 



Calappilia hondoensis, new species Eocene. 



Ranina (?), species Eocene. 



Calllanassa tepetatensis, new species Eocene. 



Family XANTHIDAE 



HARPACTOCARCINUS AMERICANUS Rathbun 



Harpactocarcinus americanus Rathbun, Proc. U. S. Nat. Mus., vol. 73, 1928, 

 art. 6, p. 3, pis. 2 and 3 ; Texas, Eocene. 



Occurrence. — Zardo Creek, about 100 meters downstream from 

 No. 108; Eocene; 1920; Coll. No. M 115 V; a fragmentary carapace 

 with arm. 



No. 2851.— Proceedings U. S. National Museum. Vol. 78, Art. 8. 



265S— 30 



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