86 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



on carapace) usually present; sternum of female not longitudinally 

 grooved. Eyes not retractile into orbits nor antennules into pits. 

 External maxillipeds pediform or subpediform. Legs long and 

 slender, only fifth pair dorsal and reduced. Uropods wholly absent. 



Genus HOMOLOPSIS Carter, MS., Bell . 



Homolopsis Carter in Bell. Monog. Fossil Malac. Crust. Great Britain, 1862 ' 

 (1863), p. 22; type, H. edtmrdsH Bell. 



Carapace longer than broad, high, quadrilateral, tuberculate; re- 

 gions distinct; branchial region large, triangular; frontal region 

 produced, orbits close together, subrotund, one superior fissure; an- 

 tennal fossae oval, transverse ; epistome strongly pentagonal. 



Cretaceous; "Tertiary." 



HOMOLOPSIS RICHARDSONI Woodward 



Plate 20. fig. 3 



Homolopsis richardsoni Woodward, Quart. .Tourn. Geol. Soc. London, vol. 

 52, 189G, p. 224, text-fig. 3. — Whiteaves, Mesozoic fossils, vol. 1, pt. 4; 

 Geol. Sur. Canada, Ottawa, 1900, p. 266, text-fig. 13. 



Occurrence. — British Columbia : Skidegate Inlet, west of AUiford 

 Bay, Queen Charlotte Islands. Cretaceous. Tyj^e in Museum of the 

 Geological Survey, Ottawa. 



PALEHOMOLA, new genus 



Type. — P. gorreUi^ new species. 



Carapace broadly ovate, narrowing anteriorly to a two-horned 

 rostrum. Two abdominal somites Adsible in dorsal view. Chelipeds 

 very long and strong. 



PALEHOMOLA GORRELLI. new species 

 Plate 21, figs. 1 and 2 



Description. — Carapace (pi. 21, fig. 1) thick, ovate, sides steeply 

 inclined, posterior margin concave at middle, exposing the first two 

 segments of the abdomen, branchial regions laterally expanded, the 

 epibranchial regions separately arcuate, as are also the hepatic 

 regions. Front furnished with two short, curved (concave inward) 

 horns. 



Very little of the surface of the crab remains; that which exists 

 on the posterior portion is finely wrinkled and still more finely 

 punctate. Linea homolica partially visible on left side. The cervical 

 groove is rather deep, the branchial groove less evident; the branchial 

 regions slope gently downward to a median point behind the cardiac 

 region. There is a high punctate posterior rim. A median and a 



k 



