NATURAL SCIENCES OP PHILADELPHIA. 



.71 



Tryblionella acuminata, 

 punctata, 

 scutellum. 

 Synedra f u 1 g e n s . 

 tabulata. 

 gracilis, 

 af finis . 

 Nitzscliia s i g m a . 



biros trat a . 

 dub ia. 

 plana, 

 scalaris. 

 obtusa. 

 Amphiprora a 1 a t a . 



lep idoptera. 

 Navicula firma, 

 liber, 

 t u m e n s . 

 didy ma. 

 lyr a. 



punctulata. 

 S m it hii. 

 cuspidata. 

 amphisbcena. 

 Pinnularia peregrina. 



cyprinus. 

 Stauroneis pulchella . 



s al i n a. 

 Pleurosigma formosum. 

 elongatum. 

 angulatum. 

 Bal t icum. 



Pleurosigma f a s c i o 1 a . 



hippocampus. 

 Dorypbora ampbiceros. 



B 03 c k i i . 

 Podospbenia Ehrenbergii. 



Lyngbyi. 

 Rbipidophora paradoxa. 

 elongata? 

 Acbnantbes 1 o n g i p e s . 

 brevipes. 

 subsessilis. 

 Rhabdonema adriaticum. 



arcuatum. 

 Striatella unipunctata. 

 Grammatopbora marina. 



serpentina 

 s u b tilis . 

 Biddulpbia pulchella. 

 rhombus, 

 a u ri ta . 

 B a i 1 e y i . 

 Podosira hormoides. 

 Melosira nummuloides. 



B or r er i . 

 Orthosira marina. 

 Mastogloia S m i t h i i . 

 Berkley a fragilis. 

 Colletonema eximiuin. 

 Schizonema cruciger. 



S m i t h i i . 

 Homeocladia filiformis. 



References to Plates. 

 Plate I. 



1. 



2. 

 3. 

 4. 

 5. 



Surirella p u 1 c h r a, n. sp. 



F ebiere r ii, n. sp. 



a, V. b, F. V. 

 a, F. V. b. F. V. 



o v a t a (sporangial). 

 Cymatopleura marina, n. sp. 

 Amphiprora conserta, n. sp 

 shew the plates, c, V. d, end view of several frustules iu union 

 6. Amphiprora Nere i s, n. sp. a, F. V. b, V. X800 



Plate 



seen obliquely to 



II. 



1. Navicula m a r g i n a t a, n. sp. a, F. V. b, V. 



2. P o w e 1 i, n. sp. 



3. ? n. sp. 



4. Mastogloia angulata, n. sp. 



5. exigua, n. sp. a, V. b, F. V. x800. 



6. Navicula t rino d is. a, V. b, variety from St. Mary's River. 



7. Pinnularia (Navicula) polyonca. 



8. Podosphenia Baileyi. a, F. V. b, V. 



9. Asterionella Bleakleyi. 

 10. Asterionella ? - . From same locality as A. f o r m o s a 



coming, N. J. 

 11. Navicula permagna. 



c, F.V. 



Long-a- 



Var. 



[Where not otherwise specified, the magnifying power used has been 500 

 diameters.] 



1861.] 



