THE FOSSIL STALK-EYED CRUSTACEA 101 



On account of the egg-shaped body, the median ridge and the 

 narrow fissures of the anterior margin, I place the species in Eumor- 

 phocorystes Binkhorst *^ described from a species, E. scuJphi^, from 

 the Chalk of Maestricht. 



Genus PALAEOCORYSTES Bell 



Palaeocorystes Bell, Monog. Fossil Malac. Crust. Great Britain, 1862 

 (1863), p. 11; type, P. broderipU Mantell. 



Carapace depressed, becoming gradually narrower posteriorly, 

 antero-lateral margin dentate, rostru'm bifid, orbit bifissured above. 

 Buccal cavity subtriangular, narrowing slightly anteriorly. First 

 thoracic sternite narrowing toward the front and expanding later- 

 ally toward the back. Episternum trilobed. Second sternite shorter 

 than first or third, widening from front to back. Third sternite 

 longer and narrower than second, fourth narrows equally, its length 

 nearly half less than third. 



Cretaceous; Eocene. 



PALAEOCORYSTES HARVEYI Woodward 



Plate 20, fig. 4 



Palaeocorystes harveyi Woodward, Quart. Journ. Geol. Soc. London, vol. 

 52, 1896, p. 225, text-fig. 4. — Whiteaves, Mesozoic fossils, vol. 1, pt. 5 ; 

 Geol. Surv. Canada, Ottawa, 1903, p. 317, text-fig. 17. 



Type-localities. — British Columbia : Hornby Island and Comox 

 River, Vancouver Island. Cretaceous. Types in Provincial Museum, 

 Victoria, and Museum of the Geological Survey, Ottawa. 



Tribe ANOMURA Milne Edwards 



Superfamily PAGURIDEA Dana 



Family PAGURIDAE Boas 



HEBMIT CRABS 



Abdomen soft, showing no trace of segmentation, straight, twisted, 

 or spirally coiled ; some of the appendages lost, the remainder much 

 reduced ; tail-fan not adapted for swimming but for holding body in 

 hollow objects. Carapace firm in fore part and soft in hind part. 

 First pair of legs chelate ; fourth pair unlike third. 



Genus PAGURISTES Dana 



Paguristes Dana, U. S. Expl. Exped., vol. 13, Crustacea, pt. 1, 1852, p. 436; 

 type, P. hlrtus Dana. 



Chelipeds similar, equal, subequal or one (usually the left) may be 

 larger than the other. Fourth pair of legs simple. Outer maxil- 



*^ Rhelnlande u. Westplial. natiiih. Vereiii. Veili., Bonn, vol. 14, 1857, p. 108, pi. 7 

 (not 6). 



