86 



A KE VISION OF THE ASTACID.E. 



Rostrum without lateral teeth (at least in the adult), -j 



I j. 



Rostrum 

 with lat- 

 eral teeth. 



linear in the middle, -i 



Areola of 



moderate 



width. 



I Arcola linear in the middle. C. Missisiippieasis. 



Areola not linear in any part. C. media*, C. immunis* 

 ( llostrum and antennal scales vei7 long. C. lancifcr. 



Rostrum and auteuual scales of moderate length. C. Palmeri. 

 llostrum with a median carina above. C. Alabumemsis, C. compressas, C. jtrojjh/'jtiiix. 

 I Sides of carapace armed with numerous spines. C. ujjimx. 



Rostrum but slightly excavated, or sub-plane. 

 C. ririlix, C ji,-<jjiit/</t>/is, var. of/scant, C. Sloanii. 

 I Margins of rostrum concave. 



Rostrum 



not ca- -1 Only one lateral 

 riuated. spine on cara- 

 pace (sometimes 

 I obsolete). 



Ac; 



KciMrum dccplv 

 excavated, willi 

 raised margins. 



C. Harrisonii, C. 



( '. forceps. 



rlargius of rostrum straight. 

 C.f.-ru/iiiiijiiux, var. Sanlinfnii. 

 C. spinosits, C. Putnuinl. 



35. Cambarus lancifer. 



Unciftr, HAGEN, 111. Cat. Mus. Comp. Zool., No. III. p. 5'J, PJ. I. figs. 86, 87, PL III. fig. 150, 



1870. 

 Cambarus laaeiftr, FAXON, Proc. Amcr. Acad. Arts and Sci., XX. 116, 1884. 



The only specimen of this species known is Hagen's type from Root 

 Pond, Miss. I cannot find in what part of the State Root Pond is situated. 



36. Cambarus affinis. 



? Altai-its liuioxus, RAPINESQUE, Amcr. Monthly Mag. and Critical Rev., II. 4-2, Nov. 1817. 



iiffmh, SAY, Journ. Acad. Nat. Sci. Phila., I. 168, Dec. 1817. 

 S affinis, HARLAS, Medical and Physical Researches, p. 230, fig. 2, 1835. 



/;,'///<////, MILNK EDWAKDS, Histoirc Naturelle des Crustaces, II. 331, 1837. 

 us -//////, DK KAY, Zoology of New York, Part VI. Crustacea, p. 23, 1S-14. (After Say.) 

 '- dstacui (Cumliiifiix) i/J/h/i.i, EiiR-nsos, Arch. f. Naturgesch., Jahrg;. XII., I. DO, 184(j. 



tni> njliaix, (iiitAKD, Proc. Acad. Nat. Sci. Phila., VI. S7, 1S.V2. (Young.) 

 Cambarw Pealei, (MKAKD, Proc. Acad. Nat. Sci. Phila., VI. 87, 1852. (Adult.) 



Cambaras ,///'', \\^^> 111. Cat. Mus. Comp. Zoiil., No. III. p. CO, PL I. figs. 19-22, 81, 85, PI. III. fig. 

 II V., 1S70. 



, ABBOTT, Amcr. Naturalist, VII. SO, 1873. (Habits.) 

 SMITH, lirp. U. S. Comm. Fish and Fisheries for 1872 and 1873, p. C3S, 1871. (After 



lll.'/l II .-Mill AllllOtl.) 



FAXON, Proe. Amer. Ae;id. Arts and Sci., XK. 14(1, 1884. 



lilii'x. \c\v York : Niagara. New Jersey : Schooley's Moun- 

 tain, Morris Co.; Red IJiink, Moinnouth Co. (Coll. Acad. Nat. Sci. Phila.) ; 

 Tivuttm; Burlington; Camdi-n Co. (Coll. Acad. Nat. Sci. Phila.). Pennsyl- 

 ; riiei> scitli lateral rostral spines. See p. 99. 



