THE MICROSCOPE, 107 
Hon. J. D. Cox, were noted as occurring among the many forms on 
the selected slide, and may be regarded as representing the major 
number of species (excluding the marine forms) which can be found 
at Mobile, Ala., outside of an extensive study and search. 
Actinocyclus Ehrenbergii. 
Antinoptychus splendens. 
Do. undulatus. 
Amphiprora elegans. 
Do. vitrea. 
Amphora proteus. 
Do. Donkinii. 
Auliscus confluens. 
Do.  pruinosus. 
Do. do. var. apiculata. 
Do. punctatus. 
Do. do. var. stigmosa. 
Do.  radiatus. 
Biddulphia aurita. 
Do. Baileyi. 
Do. levis. 
Do. rhombus. 
Do. Tuomeyi. 
Campylodiscus cribrosus. 
Do. echineis. 
Do. limbatus. 
Cerataulus turgidus. 
Cocconeis pediculus. 
Coscinodiscus excentricus. 
Do. radiatus. 
Do. subtilis. 
Cymbella cistula. 
Dimeragramma marinum. 
Epithemia zebra. 
Do. turgida. 
Do, gibba. 
Kunotia arcus. 
Do. diodon. 
Do. diadema. 
Do. triodon. 
Kupodiscus argus. 
Do. Rogersii. 
Navicula Lyra, type. 
Do. do. var. recta. 
Do. do. do. elliptica. 
Do. do. do. dilatata. 
Do.  cuspidata. 
Do: > firma: 
Do. _ elliptica. 
Do. firma, var. dilatata. 
Do. do. do. affinis. 
Do. maculata. 
Do. rhomboides. 
Do.  interrupta. 
Do. permagna. 
Do. gomphonemacea. 
Do. peregrina. 
Do. major. 
Do. nobilis. 
Do.  rostella. 
Nitzschia circumsuta. 
Do. sigma, var. elongata. 
Do. _ sigmoidea. 
Do. _ scalaris. 
Do. — dubia. 
Melosira punctata. 
Do.  Borrerii. 
Mastogloia angulata. 
Orthosira marina. 
Pleurosigma angulatum. 
Do. aestuarii. 
Do. balticum. 
Do. decorum. 
Do. formosum. 
Rhabdonema arcuatum. 
Surirella splendida. 
Do. nobilis. 
Do. _ fastuosa. 
Do. ovata. 
