86 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



own specimen the markings are round or oval blotches with fine but 

 evident beading around their margins only, and the markings of the 

 girdle are not bars but at most oval, and are often rounded into 

 disks set in quincunx order. 



It is interesting to note that Professor Bailey mentions this diatom 

 as occurring in the "SoolooSea" where I also have found it, as well 

 as in other localities in the Philippine Islands. 



Long diameter of valve, 0.107-0.135; width of frustule, 0.152- 

 0.180 mm. 



Genus LEUDUGERIA Tempere 



LEUDUGERIA JANISCHII Grunow 



(Van Heurck, Treat., p. 539, fig. 287; Van Heurck, Synopsis, pi. 127, figs. 1-4, 

 misnamed.) 



This coarse but handsome species is common in the Philippine 

 Islands. Its early assignment to Euodia-Hemidiscus , rested merely 

 on its obscure resemblance in outline to members of that genus, in 

 which respect it more closely agrees with Epithemia. In fact, Epi- 

 themia? monilifera Petit, (Diat. Camp. Isl., p. 241, pi. 14, fig. 10) is 

 so close to this that I suspect the two are the same; in which case the 

 name should become Leudugeria monilifera (Petit) Mann. 



Genus LICMOPHORA Agardh 



LICMOPHORA DEBYI (Leuduger-Fortmorel) Mann 



Plate 18, fig. 6 



(Leuduger-Fortmorel, Diat., Malaisie, pi. 5, fig. 3.) 



This remarkably shaped diatom is placed in the genus Pseudo- 

 Synedra by Leuduger-Fortmorel, an assignment that must be rejected. 

 The looseness of that author's classification is seen by comparing his 

 gure of this species with figure 2 of the same plate, also assigned to 

 Pseudo-Synedra. Not only is its Licmoplwra character evident from 

 a study of the valve view, but an entire frustule enabled me to fix its 

 true position beyond question. In fact, it differs from certain speci- 

 mens of L. ehrenbergii Kiitzing merely in having its anterior end 

 lengthened into a club-shaped extension, like the neck of a bottle. 

 (Compare with the figures of L. ehrenbergii Peragallo, Dia. France, 

 pi. 85, figs. 4-5.) 



LICMOPHORA OVATA (W. Smith) Grunow 



(Van Heurck, Synopsis, pi. 47, figs. 12-13; Smith, Brit. Diat., pi. 24, fig. 226.) 



Genus MASTOGLOIA Thwaites 



Here are included most of those Cocconeis-like forms with chambered 

 bands along the sides of each valve, but under and disconnected from 

 them, and with a central rhaphe on each valve, generally classified 



