124 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



figure 12, necessitating the adoption of a new name for this diatom. 

 One specimen found was strongly suggestive of N. nitescens Ralfs, to 

 which indeed the species as a whole bears some resemblance. The 

 type specimen came from Macassar Straits. 



NAVICULA VACILLANS A. Schmidt 



(Schmidt, Atlas, pi. 8 fig. 61; Van Heurck, Synopsis, pi. 9, fig. 9.) 



This rare species has been found also at Ostend, Belgium, and at 

 Cape of Good Hope. Fricke's Index incorrectly includes here 

 Schmidt's Atlas, plate 8, figure 37, and plate 12, figures 42-43, 52-53. 



NAVICULA VELATA A. Schmidt 



(Schmidt, Atlas, pi. 48, figs. 33-34.) 



NAVICULA VENUSTA Janisch 



Plate 27, figs. 4-5 

 (Janisch, Gaz. Exp., pi. 15, fig. 17; Peragallo, Diat., France, pi. 25, figs. 14-15.) 



The typical form and an interesting variety of this rare diatom are 

 here figured. Pantocsek subsequently gave this name to a wholly 

 different diatom (Hung. Diat., vol. 2, p. 56, pi. 5, fig. 81). Cleve 

 does not correct this because he transfers the latter to his genus 

 Colonels the validity of which is here denied. 



NAVICULA VESPARELLA, new name 



Plate 27, fig. 6 

 This sharply marked species was found by Cleve in material from 

 Java and is named Diploneis vespa and figured in Naviculoid Diatoms, 

 volume 1, page 97, plate 2, figure 5. To diatomists who can not 

 find in Cleve's restoration of the Ehrenberg genus Diploneis any 

 characteristics which mark off its members from the rest of the 

 Naviculae, this would become N. vespa (Cleve) but the name is 

 inadmissable because of N. vespa (Ehrenberg) Ralfs, as well as of 

 N. vespa O'Meara. I have therefore given to it the similar name 

 vesparella. One of the Philippine Islands specimens is typical, except 

 that the rhomboidal angles are not so pronounced as in Cleve's speci- 

 men, and is much larger 0.090 by 0.024 mm., with 7 lines in 0.01 

 mm., Cleve's being 0.050 by 0.012 mm., with 11 lines in 0.01 mm. 

 Two other Philippines specimens are exactly like the unnamed figure 

 in Schmidt's Atlas, plate 160, figure 14, from Celebes, which must be 

 considered as being only an unimportant variety of this species and 

 which have measurements that are like Cleve's type, 0.05 by 0.018; 

 with 10 lines in 0.01 mm., and 0.052 by 0.018; with 10.5 lines in 

 0.01 mm. 



NAVICULA VULPECULA A. Schmidt 



(Schmidt, Atlas, pi. 12, fig. 56.) 



The type came from Celebes Island. 



