:!44 .1. A'. YiTi-Ul Decapoil (' nislm-i-n i l'rnnnl,i. 



B'. Marginal teeth thickened, with front edge not nuich inclined forward: Itli 

 and "ith s(jnarrose. Ratio of length ti. breadth of carapace aboin l:l.:;i. 

 Edge of front thickened, distinctly foiir-lobed - .......... americanus* 



A'. A distinct transverse groove near distal end of carpus of diclipeds. 



C. Third segment of male abdomen readies coxal joint of ."itli pair iM' i. 



front not grooved. Fingers dark. Si/.c iMtlicr large. 

 D. Third marginal tooth broad e-t, arcuate po-terioHy : carpi i of chelipeds 



smooth with deep groove ____________________ ___ ....... nc,-iil,',ilil/is 



D'. Third marginal tooth dentiform, acute; carpus of chelrpeds roughened. 



serratus 



C'. Third segment of male abdomen does not reach theeo\al joint of ~>\\\ 

 pair of legs. Front prominent, l-lobed. -i oo\ ,. ( 1. Fin-er- pale : >,j/e 

 small ............ ______ ---- .......... . ............ .. In' i- n< 



Eupanopeus Herbstii (Milne-Edwards), M. ). Kathbun. 



Cancer /K//MI/.C Say, Jour. Aca<i. Nat. Sei. Phila., i, pp. .">>. III. pi. I. ti'.'. :',. 



1817. 

 Panopeus ll^-i^tii II. M.-K.hvanls. IINt. Nat. Crust., i. p. HI:;. \^:\\. He|\a\, 



Crust, of N. V., ].. ~>, pi. ix. hg. 'Ji <poon. Is I 1. Gibbes, Proc. Boston Soc. 



Nat. Ili-i.. ii. pji. i:!. r.'.i. \*\~>. Stimp-on. Amer. .lour. Sci. c.'i. \\i\. p. 



444 ( iMiu. Smith. Proc. Boston So,-. Nat. Hist., sii, p. 276, l*<i'.t : tli 



Trans., ii, p. :',4. IMiii: Kept. U. S. C'omm. Fisheries Eor 1871-72 dsTJ). p. 



547. Verrill. op. cit.. p. 47> [17s|. L874. A. .M. Kdwards, Mi^. S,-i. 



Mexiqne. pt. 5, i. p. -"S pi. Ivii. ti-. .'. INSII. |J. Uathbiin. Ki-liery Indu- 



tries of I". S., section i. p. 77.'. l ss l. I'.enerlict and M. .1. K'athlnin. The 



Genus Panopeus, Proc. (". s. Nat Mnseum. xiv, \>. '.\~>*, pi. .\i\. ti-- 1 2; 



pi. xxili, figs. 10-1 S. ISSM. 

 /;/'/- ( /, ii lyiciis lii'rlixlii M. J. Rathbun. Bull. Labr. Nat. Hist. Mate Univ. of 



Iowa, iv, p. ,>;:!, 1N9S; Pm,-. \Vash. A.cad. Sci.. ii. p. Mo, I'.Hiii: A.mer. 



Naturalist, xxxiv. p. i:',S, 1900; Brach. and Ma.-r. p,,rto |{i<-o. p. -,'s. mill. 



s 14. /*, 1."). PLATE XV, FiuniKs 1, ^, :! ; VAHIKTIKS. 



The common and nioiv typical t'oi'in of this species, \vhidi i- Cen- 

 trally distriliutc'l aloiio- tin- c:istrni <-(.;i-t ..I' tin- ruitrd Stales, smith 

 of Cape Cod, especially on oyster beds, MTIIIS to IK- rather common 

 in Bermuda. .Most of tin- specimens that I ha\c -ecu liolono- to this 

 variety. This form, or variety, regarded as typical (var. //< r/txlii) 

 usually has the postcro-latcral margins or flanks of the carapace 

 either straight or slight concave, and convergent, while in the other 

 varieties they are usually distinctly convex, giving the posterior half 

 of the outline a more elliptical form. The Ic^s are rather short. 

 The marginal teeth are inclined forward and acute, the third tooth 

 being only a little broader and less acute than the rest, with the 



* Not positively known from Bermuda, but perhaps confused with Herbstii, 

 from which it differs but slightly. 



