358 THE GENUS PANOPEUS BENEDICT AND KATHBUN. 



A". Aatero-lateral border cut iuto deutiforui lobes — Coutinued. 

 B". Carapace tiattened. 

 C Carpal groove present. 



D'. Oatliue of coalesced tooth convex ovatus 



D", Oatliue of coalesced tooth emargiuate parvulus 



D'". Outline of coalesced tooth euiargiuate, Carapace absolutely tlat. 



2}lanissi>nu8 

 C". Carpal groove wanting. 



D'. Color of tiuger running up on hand ...planus 



D". Color restricted affinis 



Note. — HemphiUii, packardii, haritii, and wu^'demannii occasionally lack the 

 large tooth on the dactyl. 



1. Panopeus herbstii Milne Edwards. 



Plate XIX, figs. 1 and 2 ; plate xxiii, figs. 10-12. 



Cancer panopr. Thomas Say, Jour. Acad. Nat. Sci. Phila., i, pp. 58, 447, pi. 4, fig. 3, 



1817. 

 Panopeub herbstii. Milue Edwards, Hist. Nat. des Crust., i, p. 403, 1834. J. E. De Kay, 



Crust, of N. Y.,p. 5, 1844. Lewis R. Gibbes, Proc. Bostou Soc. Nat. Hist., 2, pp. 



03. G9, 1845; Proc. Acad. Nat. Sci. Phila. V, p. 23, 1850; Proc. Anier. Assoc. 



Adv. Sci., 3, p. 175, 1850. Adam White, Crust. iuBrit. Mus., p. 18, 1847. H. 



Lucas, Hist. Nat. des Crust., p. 90, 1851. Joseph Leidy, Jour. Acad. Nat. Sci. 



Phila. (2), III, p. 17, 1855. ^Y. Stiuipsou, Amer. Jour. Sci. (2), 29, p. 444, 18(30. 



Camil Heller, Reise Fregatte Novara, Bd. 2, Abth. 3, p. IG, (1864) 1868. S. I. 



Smith, Proc. Boston Soc. Nat. Hist., xii, p. 276, 1869 ; Trans. Couu. Acad., ii, p. 34, 



18G9 ; Rept. U. S. Commr. Fisheries for 1871-72 (1874), pp. 547, 472. Elliott Coues, 



Proc. Acad. Nat. Sci. Phila. (3), 1, p. 120, 1871. E. von Martens, Arch fur 



Natur.,38, p. 89,1872, J. S. Kingsley, Proc. 4cad. Nat. Sci. Phila., p. 318, lfi78; 



XXXI, p. 393, 1879, A. Milue Edwards. Miss. Sci. au Mexique, pt, 5, l,p, 308, pi. 



LVii,fig. 2, 1881; Bull, Mus. Couip. Zoo!., Vlil, p. 13, IcSO. R. Rathbuu, Fishery 



Industries of U. S., sectiou i, p. 772, 1884. Carl F. Gissler, Amer. Nat., xviii, p. 



225, 1884. B. Ozorio, Jor. Sci. Lisbon, p. 190, 1888. 

 Panopeioi Iacu>itris. Desbonne et Schramm, Crustaces de la Guadeloupe, (p. 28), 1867. 

 Panopeus lierbstii var. ohesiis. S. I. Smith, Proc. Bostou Soc. Nat. Hist., xii, p. 2<8, 



1869. Elliott Coues, Proc. Acad. Nat. Sci. Phila. (3), 1, p. 120, 1871. J. S. Kingsley, 



Proc. Acad. Nat. Sci. Phila., p. 318, 1878. A. Milne Edwards, Miss. Sci. au Mexique, 



pt. 5, 1, p. 309, 1880. 



Nuuierous lots of this species ranging fioin Rhode Island to Key 

 AVest, Florida, along the Gulf coast to Louisiana, and along the coast of 

 South America to Brazil, iucliuling a number of the West Indian islands, 

 show remarkable variation in form. For our own convenience in the 

 study of the species, we divided them iuto six varieties according to 

 the prominence and direction of the antero-lateral teeth. In the speci- 

 mens placed at one extreme of the series, var. G, the teeth are blunt, 

 directed forward, exterior edge rounded or arcuate, the second and 

 third broad at the base. Posterior lobe of coalesced tooth broad and 

 rounded, anterior lobe angular. In the specimens i)laced at the other 

 extreme of the series, var. B, the antero-lateral teeth are sharp-pointed 

 and project forward and outward. The notches between them are 

 broader than in var. G, making the bases of the teeth narrower. The 

 coalesced tooth in this variety is more deeply cut iuto two angular 



