. Bulletin - United States National Museum. Science. 336 BULLETIN 152, UNITED STATES NATIONAL MUSEUM. FlSURE 52.—PANOPEUS HERBSTn, MALE, major chela, enlarged. after Benedict and Rathbun the lateral angle to the orbital angle. Front about two-sevenths the greatest width of carapace; middle portion advanced only a little beyond outer angles. Chelipeds heavy, granulate; carpus without a groove parallel to distal margin. Dark color of immovable finger continued for a short but variable distance on palm. Third segment of male abdomen reaching coxae of feet of fifth pair; terminal segment broader t
. Bulletin - United States National Museum. Science. 336 BULLETIN 152, UNITED STATES NATIONAL MUSEUM. FlSURE 52.—PANOPEUS HERBSTn, MALE, major chela, enlarged. after Benedict and Rathbun the lateral angle to the orbital angle. Front about two-sevenths the greatest width of carapace; middle portion advanced only a little beyond outer angles. Chelipeds heavy, granulate; carpus without a groove parallel to distal margin. Dark color of immovable finger continued for a short but variable distance on palm. Third segment of male abdomen reaching coxae of feet of fifth pair; terminal segment broader than long, rounded at end. Color.—Dull brown-green, paler below. Chelipeds deeper, sometimes spotted with claret brown. Fingers blackish. A dirty gray or slate color (Hay and Shore). Variation.—Extremely variable, espe- cially as to convexity, proportionate length and width, acuteness of lateral teeth, depth of sinus between first and second teeth. Apart from typical herbstii or forma typica, three forms are sufficiently different to be worthy of distinct names and yet not so sharply separated in characters or distribution as to be considered subspecies or varieties. FORMA OBESA Smith Plate 156, Figure 3 Carapace very convex antero-posteriorly, usually shorter and broader than in typical herbstii. Lateral teeth more outstanding, their outer margins not forming a regular curve from the lateral angle to the orbital angle; the tips of the last two teeth not curved inward; the third to fifth teeth less sharp than in typica, the third and fourth blunt in the old, third suboblong. Chelae more elongate than in typica. FORMA CRASSA A. Milne Edwards Plate 157, Figure 3 Carapace wide, much swollen in the meso- branchial region. Front scarcely retreating in the middle, outer angles prominent. Lateral teeth more outstanding than in either of the two above described forms, second tooth smaller and less lobiform, last three teeth widely separated, acute and with a sharp granulated edge
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