XEW CRAYFISHES FROM FLORIDA — HOBBS 389 



description, I do not believe he had a first-fonn male before him, but 

 rather that both specimens were of the second form. Faxon's state- 

 ment (1898, p. 646), "1 am therefore inclined to believe that the dis- 

 crepancies between the Swedish author's account of C. acherontis and 

 the specimens before mc [from Gum Cave] are due to differences in 

 age and sex, and in part to inaccuracy of description and delineation," 

 is unjust as far as his charge of inaccuracj^ is concerned. Lonnberg's 

 description is remarkably well done. It is regrettable that Faxon 

 failed to investigate the type locality, that he failed to accept Lonn- 

 berg's description at its face value, and that he thus confused two 

 cavemicolous species. Faxon's specimens are identical with (7. 

 lucifugus lucifugus. 



At present two groups of cavemicolous crayfishes are known from 

 Florida, each closely related to surface forms. The first of these 

 groups has only one representative, C. acherordis Lonnberg; the other 

 is represented by three foniis: C. pallidus, C. lucifugus lucifugus, C. 

 lucifugus alachua . 



KEY TO SPECIES OF CAMBARUS REFERRED TO IN THIS PAPER 



1 . Rostrum with lateral spines or with margins broken 2 



Rostrum without lateral spines, margins smooth 7 



2. Albinistic (dorsal surface of abdomen pigmented in some) ; eyes reduced 3 



Colored; ej-es well developed 4 



3. Hook on ischiopodite of fourth pereiopod of male simple, not bituberculate.. G 

 Hook on ischiopodite of fourth pereiojjod of male bituber- 

 culate acherontis (p. 390) 



4. Rostrum broadest at base. .5 



Rostrum broadest distad of base lucifugus lucifugus (p. 398) 



5. Pigment spot in eye lucifugus alachua (p. 402) 



No pigment spot in eye pallidus (p. 394) 



G. First pleopod of male with knoblike projection on distal caudo- 



lateral margin pictus (p. 419) 



First pleopod of male \\ithout knoblike projection on distal 



caudolateral margin pubescens 



7 . Areola moderately broad ; chelae sulw vate S 



Areola very narrow; chelae strongly compressed dorso- 



ventrally advena 



8. Inner margin of palm of chelae of males barbate 9 



Inner margin of palm of chelae of males not barbate 10 



9. Hooks on ischiopodites of third and fourth pereiopods of 



male barbatus 



Hook on ischiopodites of only the third pereiopods of male^ _ hubbelli (p. 406) 

 Hooks on ischiopodites of third and fourth pereiopods of male- kilbyi (p. 410) 

 Hooks on ischiopodites of only the third pereiopods of 



male rathbxmae (p. 414) 



Measurements were taken as follov/s: Height of carapace, where 

 cervical groove intersects the niidrlorsal line; ividfh of carapace, the 

 greatest width, generalh" about midway bet^\•een cervical groove and 



