THE FOSSIL, STALK-EYED CRUSTACEA 133 



Relation. — This species appears to be the ancestor of A. gmnhelil 

 (Girard)^^ through A. gamhelii connectens Faxon *"'° both of which 

 forms now inhabit the Snake River valley in Idaho. A. (jambela 

 and its subspecies have a rostrum bordered by stout spines as in A. 

 chenoderma; and A. g. connectens has the prominent posterior spLne 

 on the postorbital ridge, which is present in chenoderma but not in 

 typical ganibelii. The bearded manus of gamhelii apparently existed 

 in chenodermn. The asymmetry of the chelae of chenoderma^ an 

 asymmetry the constancy of which it is impossible to determine 

 owing to the fragmentary character of the material, is repeated, to 

 a limited extent in old males of typical gaml>eUi^ where, however, 

 the right chela is the larger of the two. 



Tribe PALINURA Borradaile 



Superfamily GLYPHEIDEA Van Straelen, 1925 



Carapace subcylindrical, rostrum well developed; cervical suture 

 deep; branchio-cardiac sutures present; cephalic region carinated: 

 at least the first pair of pereiopods with a terminal dactyl or lepto- 

 chelate; exopod of uroi3ods with a dieresis. (Van Straelen.) 



Family GLYPHEIDAE Winckler 



Scaphocerite present. 



Genus GLYPHEA von Meyer 



Ghjphea von Meyer, Neue Gattungen fossiler Krebse, Stuttgart, 1840, p. 10 ; 

 type, G. regleyana (Desmarest). 



Rostrum moderately elongate ; cervical suture very deep ; branchio- 

 cardiac and postcervical sutures subparallel in a large part of their 

 course; carinae nearly always present on cephalic region; antennules 

 biflagellate, peduncles very long, consisting of at least three articles, 

 flagella short and subequal; antennae with a flagellum longer than 

 those of the antennules, and a very long peduncle with a pointed 

 scaphocerite ; third pair of maxillipeds well developed ; all five pairs 

 of pereiopods with terminal dactyls, the first pair extremely long, 

 subcheliform ; telson wide and rounded; uropods in form of palettes. 

 (Van Straelen.) 



Triassic to Cretaceous. 



89 Hagen, 111. Cat. Mus. Comp. Zool., No. 3, 1870, p. 90, pi. 1, figs. 97, 98 ; pi. 3, fig. 

 170; pi. 11. 



""Mem. Mus. Comp. Zool., vol. 40, 1914, p. 360, pi. 7, figs. C and 10 ; pi. 10, fig. 1. 



