82 Clarence J . Elmore 



42. Navicula crucicula (W. Sm.) Donkin. Brit. Diat., p. 44, pi. 



6, fig. 14. i8yi. 



Stauroneis crucicula W. Sm. Brit. Diat., I, p. 60, pi. ip, fig. 

 192. 1853. 



PI. 9, figs. 360-362 ; pi. 22, fig. 829. 



Lanceolate or lanceolate-elliptic with apices obtuse, sometimes 

 attenuate, 26-70/* long, 8-20 /a wide; striations extending almost 

 to the raphe, slightly or much shortened opposite the central nodule, 

 where they are coarser and slightly more distant than the others, 

 giving the appearance of a stauros, the others radiate, or at the 

 ends transverse, finely punctate, 16-18 in 10 fx. 



In salt marsh, Arbor; damp ground, Long Pine. 



43. Navicula integra (W. Sm.) Ralfs in Pritch. Infusoria, p. 8pfj. 



1861. 



Pinnularia integra W. Sm. Brit. Diat., II, p. g6. 18^6. 



PI. 22, fig. 838. 



Elliptical-lanceolate with a constriction near each end, and ros- 

 trate-apiculate ends, 23-38 /a long, 8-9 ju, wide; striations about 23 

 in 10 /x, more distant in the middle, reaching nearly to the raphe. 



In Prairie Creek, Grand Island. 



44. Navicula rotaeana (Rabenh.) Cleve. Nav. Diat., II, p. 128, 



1894. 

 Stauroneis rotaeana Rabenh. Hcdiv., I, p. 103, pi. 13, fig. 7. 



1852. 

 Stauroneis minutissima Lagerst. Spetsb. Diat., p. ?p. pi. I, fig. 



13- 1873- 

 Stauroneis oralis Greg. M. J., IV, pi. I, fig. 36. 18^6. 

 Stauroneis cohnii Brun. Diat. des Alpes, p. pr, pi. IX, fig. 10. 



1880. 

 PI. 22, fig. 828. 



Elliptical, i3-24yu, long, 6-8 /* wide, apices rounded; striations 

 radiate, about 28 in 10 /a, shortened in the center, leaving a pseudo- 

 stauros which extends nearly to the margins. 



In lake in Estes Park, Colo. 



