^°mi!'''] PEOCEEDINGS OF THE NATIONAL MUSEUM. 357 



H. de Saussure, M^m. Soc. Phys. Geneve, xiv, p. 431, 1857. W. Stiinpson, Ann. 

 Lye. Nat. Hist. N. Y., vii, p. 54, 1h59. S. I. Smith, Proc. Boston Soc. Nat. Hist., 

 XII, p. 275, l'i69. A. Milne Edwards, Miss. Sci. au Mexique, pt. 5, i, p. iJ06, 18'iO. 

 W. A. Haswell, Cat. Anstralian Crust., p. 51, 1882. H. W. Conn, Stud. Biol. Lab. 

 Johns Hopkins Univ., iii, No. 1, pp. 4-9, figs., 1884. E. J. Miers, Challengei 

 Eept., Z'.Ol., XVII, p. 128, 1886. 



Eurytium. W. Stimpson, Loc. cit., p. 56. A. Milne Edwards, Loc. cit., p. 332. E. J. 



Miers, Loc. cit., p. 140. 

 Eurypaiiopeus. A. Milne Edwards, Loc. cit., p. 318. 



Orbit interrupted by au external hiatus, below entire. Antero-lateral 

 margiu thin, ofteu shorter than the postero-lateral and directed toward 

 the external angle of the orbit. (Dana, loc. cit., p. 149.) 



ARTIFICIAL KEY TO SPECIES EXAMINED. 



A'. Antero-lateral border cut into teeth. 

 B'. Dactyl of large hand with a large basal tooth. 

 C Carpal groove present. 

 D'. Fingers light. 

 E'. Outline of male abdomen slightly concave, terminal segment 



rounded bertmdensis 



E'. Outline of male abdomen very concave, terminal segment 



pointed heviphiUii 



D '. Fingers dark. 

 E'. Carpus smooth or nearly so. 



F'. Seventh sternal plate in male exposed angusfifrous 



F". Seventh sternal plate in male not exposed. 



G'. Front faintly four-lobed occidenfalis 



G". Front produced, much rounded packardii 



E". Carpus rugose. 



F'. Antero-lateral teeth thickened vertically harttii 



F". Antero lateral teeth thin serratus 



D". Fingers variable. Front grooved wurdemannii 



C". Carpal groove wanting or indistinct. 

 D'. Anterior margins of antero-lateral teeth nearly perpendicular 



to the median line. Front thickened, truncate areolatus 



D". Antero-lateral teeth pointing slightly forward. Front beveled herhstii 



D'". Antero-lateral teeth strongly hooked forward validus 



B". Dactyl of large hand without a large basal tooth. 

 C. Male abdomen with five segments. 

 D'. Terminal segment triangular. 



E'. Fingers black <,«j/t 



E". Fingers white texanus 



D". Terminal segment rounded. 



E'. Fingers black depressus 



E". Fingers white harrisii 



C". Male abdomen with six segments diasimilis 



A '. Antero-lateral border cut into dentiform lobes. 



B . Carapace convex. / 



C. Seventh segment of sternum exposed, separating the third segment 

 of abdomen from the cox;c of the fifth pair of feet. 



D'. Front with two well-rounded lobes limonus 



D". Front with margins of lobes straight or nearly so crenutus 



C". Seventh segment of sternum not exposed tramversua 



