MARINE DIATOMS OF THE PHILIPPINE ISLANDS 63 



identification, a use which I hold to.be at present the principal one 

 in diatom taxonomy. 



COCCONEIS DIVISA A. Schmidt 



(Schmidt, Atlas, pi. 198, fig. 12.) 



COCCONEIS FULGUK Bruit 



(Brun, Espec. Nouv., pi. 18, fig. 3; Schmidt, Atlas, pi. 198, figs. 20-21, 



doubtful.) COCCONEIS HETEROIDEA Hantzsch 



(Schmidt, Atlas, pi. 196, figs. 31-41; H. L. Smith, Types, No. 73.) 



COCCONEIS INSIGNIS Janisch 



(Schmidt, Atlas, pi. 197, figs. 2-3.) 



COCCONEIS OCELLATA, new species 



Plate 14, fig. 1 

 Valve broadly oval, covered with somewhat wavy rows of closely 

 set beading, the spaces between the rows about equal to them in 

 width- progressively curved away from the center as they approach 

 the ends of the valve, reaching from the margin to the rhaphe line 

 and therefore leaving no hyaline space on either side of the rhaphe; 

 near the margin the rows regularly but not invariably fork into two 

 smaller rows, thereby producing a border effect along the margin; 

 markings of upper and under valves the same; a large, evident, but 

 indistinctly outlined ocellus set to one side of the middle of the valve, 

 smaller and less distinct on the under valve. 



Length, 0.062-0.082; width, 0.048-0.062 mm.; lines, 5.5 in 0.01, at 



the rhaphe. 



7^__Cat. No. 43610, U.S.N.M. 



COCCONEIS OCULUS-CATI Brun 



(Brun, Espec. Nouv., p. 17, pi. 18, fig. 5.) 



Schmidt's C. Tiospes (Atlas, pi. 198, figs. 4-6) resembles this species, 

 but is probably distinct. 



COCCONEIS OS-PRISTIS, new species 



Plate 14, fig. 2 

 Valve oval in general shape, but somewhat angular in outline, the 

 sides being slightly convex until within one-third of the apex then 

 bent at an obtuse angle and continuing straight to the sharp but not 

 produced apex; strong, smooth radiating costae tapering inward, 

 swollen at the marginal ends to semibeads, the pointed inner ends 

 not approaching the rhaphe line but leaving a spindle-shaped central 

 hyaline area reaching to the two apices and about equal in width to 

 the costal area on either side; costal marking alike on both valves 

 Length, 0.065-0.070; width, 0.035-0.037 mm.; lines, 3.6-4 in 0.01 



mm. 



Type.— Cat. No. 43611, U.S.N.M. 



35035—25 5 



