Mr. C. Mereschkowsky on Californian Diatoms, 517 
215. Isthmia nervosa, Kiitz. Monterey, Santa Barbara, very 
common; San Pedro, very rare. {M.] 
216. Melosira Borreri,Grev. San Pedro, verycommon. [M.] 
217. Melosira Jurgensii, Ag. San Pedro, rare. [M.] 
218. Melosira nummuloides (Bory), Ag. San Pedro, rare. 
[M]. 
219. Melosira sol, Kiitz. (Cyclotella radiata, Br. Dia- 
tomeent. zus. f. ein. Fr. pl. xxix. fig. 11.) San Pedro, 
common; Monterey, somewhat rare. [M.] 
220. Podosira Febigerii, Grun. (Arct. Diat. p. 119). [G.] 
221. Podosira fusca, Mer. San Pedro, rather rare. [M.] 
See my paper on the Diatoms of the Black Sea. 
222. Podosira maxima, var. californica, Grun. (Arct. Diat. 
pam) hes 
223. Hyalodiscus subtilis, Bail. Northern California, very 
common; San Pedro, not rare. [G., M.] 
224. Hyalodiscus subtilis, var. scotica (Kiitz.), Grun. San 
Pedro, not very rare. [M.] 
225. Eupodiscus californicus, Grun. (V. Heurck, Synops. 
pl. exviil. fig. 8). Gulf of California. [V. H.] 
226. Aulacodiscus circumdatus, A. 8. (A. 8., Atlas, pl. xxxv. 
fgso; Wolle, Am: Diat.pl. lvui. fe. 7). [A. 8.] 
227. Aulacodiscus Kittonii, Arn. San Pedro, very common. 
[M.] 
228. Aulacodiscus oregonus, Grev. San Pedro and Northern 
California, common. [V. H., M.] 
229. Aulacodiscus orientalis,Grev. San Pedro and Northern 
California, very rare and somewhat doubtful. [M.] 
230. Auliscus sculptus, var. celata, Bail. San Pedro, not 
rare; Northern California. [M.] 
231. Auliscus sculptus, var. punctulata, Mer. Northern 
Calitornia, not very rare. [M.] 
See my paper “On Polynesian Diatoms,” chapter iv. 
232. Actinoptychus heliopelta,Grun. San Pedro, rare. [M.] 
233. Actinoptychus splendens (Schadb.), Ralfs. San Pedro, 
not very rare. [M.] 
234. Actinoptychus undulatus, Hhr. San Pedro, not rare. 
\/ 
at . 
