60 Richard Franz, Judy Bauer and Tom Morris 



30-lcm stretch between the two areas. All of the known occurrences of 

 this fauna are in flooded caves associated with springs, sinkholes, and 

 wells. These cave systems are developed near the contact between the 

 basal units of the Hawthorne Formation and the underlying Ocala Group 

 limestones (Floridan aquifer) (Hobbs and Franz 1986, 1990, 1992). 



The Wekiva Assemblage includes an undescribed isopod (Caecidotea 

 sp. 2), Procambarus acherontis, and an unstudied population of Troglo- 

 cambarus. It occurs in a small limestone plain that lies along the 

 Wekiva River, and east of the Lake Apopka basin, in western Orange 

 and Seminole counties. Groundwater originates in a sand hill region 

 south of the sinkhole plain. A north-directed branch of this water 

 flows northeast towards the Wekiva valley, but an eastern branch 

 intersects a "bad water zone" in eastern Orange County that contains 

 dissolved solids in excess of 1,800 ppm (Barraclough 1962, Lichtler 

 et al. 1968). The north branch emerges as springs along the south 

 escarpment of the river (Rock, Wekiwa, Palm, Sanlando, Witherington, 

 and Barrel springs). Analysis of water from these springs shows less 

 than 150 ppm of dissolved solids, and several, such as Palm Springs, 

 have the odor and white slimy bacteria that are associated with sulphur 

 springs. 



The Lake George Assemblage remains poorly known. Three 

 crayfishes are known: Procambarus attiguus, P. delicatus, and P. 

 morrisi. The first two belong to the seminolae group and probably are 

 related to Troglocambarus, whereas Procambarus morrisi is related 

 to P. acherontis. Riverine karsts extend north of the Lake George 

 springs area to at least Green Cove Springs in Clay County. Divers 

 that penetrated the spring at Green Cove reported no troglobites (WS), 

 although more effort is necessary, possibly using baited traps, to verify 

 their observations. More exploration in the riverine karsts along the 

 Oklawaha River should be encouraged. The presence of Procambarus 

 attiguus at Devils Sink in Putnam County and Procambarus lucifugus 

 and sightings of isopods and amphipods in Silver Springs suggest a 

 region with a complex biota. ^ 



Miami Fauna 



Species List — **Crangonyx grandimanus, **C. hobbsi, "^Procambarus 

 milleri. The Miami Fauna was collected from shallow wells at the 

 Little Bird Nursery and Garden Store in Miami (Hobbs 1971) and in 

 northeast Homestead (HHH, personal communication). The latter site 

 is approximately 22 km southwest of the type locality (W. Loftus, 

 personal communication). According to Hobbs (1971), the original specimens 

 from the type locality were obtained from a trap at the outlet of a 

 motorized pump associated with the Little Bird well in 1968. Both 



