MABINE DIATOMS OF THE PHILIPPINE ISLANDS HI 



figure 33; also to N. digito-radiata Gregory, well illustrated in Pera- 

 gallo's Diatomaceae of France, plate 12, figure 28, and to N. Solaris 

 Gregory, in the Microscopical Journal for 1856, plate 5, figure 16. 

 My specimens came from Jolo Jolo, and are of striking delicacy. 

 Type,— Cat, No. 43651, U.S.N.M. 



NAVICULA MULTICOSTATA Grunow 



(Grunow, N. Ung. Gek. Diat,, pi. 1, fig. 13; Schmidt, Atlas, pi. 11, figs. 14, 20; 

 pi. 12, figs. 71-72.) 



Rather generally held to be a phase-form of N. crabro Ehrenberg. 

 The variety shown in Schmidt's Atlas, plate 11, figure 20 is common 

 to both Campeche Bay and the Philippine Islands. 



NAVICULA NEBULOSA Gregory 



(Gregory, Diat., Clyde, pi. 1, fig. 8; Donkin, Brit. Diat., pi. 2, fig. 2; Schmidt, 

 Atlas, pi. 3, fig. 14.) 



This species is similar to N. hennedyi W. Smith and some authors 

 have published it as a variety of that species. But it is much more 

 delicately formed and sculptured, appearing constant from a great 

 many localities. 



NAVICULA NITESCENS Ralfs 



(Donkin, Brit. Diat., pi. 1, fig. 7; Schmidt, Atlas, pi. 7, figs. 37-41; Gregory, 

 Diat., Clyde, pi. 1, fig. 16.) 



This species is common to both Campeche Bay and the Philippine 

 Islands. 



NAVICULA NOTABILIS Greville 



(Micro. Journ., 1863, p. 18, pi. 1, fig. 9.) 



The original locality is unknown. I have found it also in material 

 from Hilo, Hawaiian Islands. 



NAVICULA NUMMULARIA Greville 



(Greville, Cal. Guano, p. 30, pi. 4, fig. 6.) 

 This is close to N.forcipata Greville. 



NAVICULA OAMARUENSIS Grunow 



(Schmidt, Atlas, pi. 129, fig. 9; pi. 204, fig. 13.) 



I do not like this identification ; but my specimens are so nearly 

 like this hitherto local, fossil species that a new name is not justified. 



NAVICULA OBESA (Greville) Mann 



Plate 23, fig. 6; plate 24, fig. 1 



This is Greville's Stauroneis obesa, in Diatoms from the South 

 Pacific, page 237, plate 3, figure 12. Under my Cocconeis citronella, 

 new species, the under valve of which is strikingly similar to this 

 diatom, I have mentioned the fact that Cleve rather arbitrarily united 



