378 THE GENUS PANOPEUS — BENEDICT AND EATHBUN. 



Length of carapace in large specimen, 11> millimetres; width, 27 mil- 

 limetres. 



The specimens examined are from Callao, Peru; F. H. Bradley (Yale 

 Univ. Mus.). 



23. Panopeus harrisii (Gould). 

 (Plate XXI, fig. 2; plate xxiv, fig. 16.) 



Piliimnvs harrisii. A. A, Gould, Invert, of Mass., p. \i26, 1841. 



Fanopeun harrinii. W. Stinipsou, Anu. Lye. Nat. Hist., vii, p. 55, 1859. S. I. Smith, 

 Kept. Coiiiuir. of Fisheries for 1^71 and 1872 (1874), pp. iJ47, 313; Trans. Conn, 

 Acad., V, J). 37, 1879. J. S. Kiugsley, Proc. Acad. Nat. Sci. Phila., p. 319, 1878 

 A. E. Yerrill, Check-List of Marine Invert., p. 1, 1879. A. Milue Edwards, Miss. 

 Sci. an Mexique, pt. 5, i, p. 312, pi. LViii, fig. 3, 1880; Bull. Mus. Comp. Zool., 

 VIII, p. 13, 1880. R. Rathhun, Fishery Industries of U. S., section i, p. 77'?, 

 1884. Carl F. Gissler, Amer.Nat., xviii, p. 225, 1884. 



Carapace convex longitudinally, much less convex transversely; wider 

 posteriorly than the other species of the genus, giving it more of a quad- 

 rilateral appearance. There are two transverse lines of granules on the 

 gastric region, a line extending from the posterior tooth to the gastric 

 region, and a line on the mesogastric. 



Front very little produced, nearly straight, channeled on its forward 

 edge, giving it a double appearance; upper and lower margins granu- 

 late; median notch triangular. 



Antero-lateral teeth not prominent. Coalesced tooth inconspicuous, 

 flattened. Second and third teeth point obliquely forward. Last tooth 

 small. 



External hiatus of orbit a very slight, nearly closed fissure. Sub- 

 hepatic tubercle wanting. 



Second segment of male abdomen short, much broader at its distal 

 end. sides nearly straight. Seventh steri;al plate exposed, in contact 

 with the sixth, covering the verges. Abdomen much constricted at 

 the articulation of the anchylosed and penultimate segments. Ter- 

 minal segment about as long as broad. Distal end flattened, giving it 

 a subrectangular shape. 



Distal edge of carpus bordered by a line of granules. Lines and 

 bunches of granules are scattered over the upper surface. Carpal 

 gioove prominent. Hands and lingers white, with no large tooth at 

 the base of the dactyl and none-on the manus. The two ridges on the 

 upper edge of the hand are granulate, and there are granules also on 

 the upi)er edge of the fingers. Fingers slender, their prehensile edges 

 evenly dentate. Ambulatory feet long, slender, and compressed. 



Some of the specimens from the region of Winyali Bay, South Caro- 

 lina, were found in streams where the water was entirely fresh. 



Length of carapace in large specimen, 11 millimetres ; width, 14.5 

 millimetres. 



