ELASMOBRANCHII 



Fig. 13. — Lcmna cv.spidata Agassiz. 1-4, Monmouth Co. (Knieskern) ; 5-8, Monmouth 

 Co. ( Cleburne; ; 9, Monmouth Co. (Cleburne and Abbott); 10, Monmouth Co. (Cle- 

 burne); 11-12, Monmouth Co. (Cleburne and Abbott); 13-18, Burlington Co. (Conrad); 

 19-20, Burlington Co. (Budd; ; 21-22, Burlington Co. (Conrad); 23-26, Pemberton 

 (Budd); 27, Allowaystown (Yarrow); 28-40, Vincentown (Bryan). 



