388 



PROCEEDINGS OF THE NATIONAL MUSEUM 



■JTOt/. Si.t 



north of Orlando, in the same county, and close to the Seminole 

 County line. These he described and figiu'ed as a new species, 

 Cambarus acherontis (1894b, p. 6). Unfortunately, both of his speci- 

 mens, which were males, are no longer extant. 



Learning from my friend Ralph Harmon that he had seen white 

 crayfishes in Palm Springs, Semmole County, which lies approximately 

 the same distance north of Orlando as Lonnberg's type locality and 

 actually not more than 2 miles from it, I hastened to the place, together 

 with Mr. Harmon and Lewis Marchand. We foimd more than two 

 score of white crayfishes lying hi the algae over the bottom of a pool 

 formed by the spring. This pool (walled-up for swimming purposes) 



mesial viev 



lateral view 



Figure 14. — Figure of hypothetical first pleopod of first-form male to illustrate descriptive 

 terminology: A, Mesial process; B, cephalic process; C, centrocaudal process; D, caudal 

 process; E, centrocephalic process. The so-called central projection of the pleopod is 

 made up of the juxtaposed centrocaudal and centrocephalic processes, C and E. 



measures about 60 by 20 feet; most of it is approximately 6 feet deep. 

 The walls and bottom were covered with a thick algal growth and 

 deposited on it was a sediment characteristic of sulphur springs. 

 The water had a pH of 7.6. Mr. Marchand caught most of the 44 

 specimens that we secured by diving to the bottom and capturing 

 them with his hands. They were extremely sluggish, many lying in 

 the algae on their backs with their feet turned up toward the surface 

 as though dead. Even after they were basrged there was little sign of 

 life. 



Comparing these specimens with the description of C. acherontis 

 Lonnberg (1894b, p. 6), I find close agreement with the second-form 

 males, but, judging from Lonnberg's figures 5a and 5b, as well as his 



