MARINE DIATOMS OF THE PHILIPPINE ISLANDS 23 



AMPHORA FORMOSA Cleve 



(Schmidt, Atlas, pi. 28, fig. 34 and pi. 39, fig. 2.) 



AMPHORA FURCATA Leuduger-Fortmorel 



(Leuduger-Fortmorel, Diat., Ceyl., p. 20, pi. 1, fig. 11; Schmidt, Atlas, pi. 40, 

 figs. 19-23, misnamed.) 



This delicate diatom with remarkably forked lines upon the dor- 

 sal side, whence its name, is referred by Schmidt to A. spectabilis 

 Gregory, which is similar in outline only, as may be seen from his 

 description in Diatoms of the Clyde, page 516, and the figure on plate 

 13, figure 80. 



AMPHORA FUSCA A. Schmidt 



(Schmidt, Atlas, pi. 27, fig. 68.) 



The original was from the Gulf of Mexico. 



AMPHORA GIBBA A. Schmidt 



(Schmidt, Atlas, pi. 39, fig. 32.) 



The specimens found were of the Campeche Bay type. 



AMPHORA GIGANTEA Grunow 



(Schmidt, Atlas, pi. 27, fig. 46.) 



This is also a Campeche Bay diatom found at the Philippine 

 Islands. 



AMPHORA GRAEFFEI Grunow 



(Schmidt, Atlas, pi. 25, figs. 40, 42.) 



AMPHORA GREVILLEANA Gregory 



(Schimid, Atlas, pi. 25, fig. 41.) 



AMPHORA GRUNDLERI Grunow 



(Schmidt, Atlas, pi. 28, figs. 24-27, and pi. 39, fig. 25.) 

 The original of this was also from Campeche Bay. 



AMPHORA HENSHAWII, new species 



Plate 3, fig. 8 



Dorsal side with a small shallow median sinus, which is otherwise 

 strongly convex to the slightly enlarged rounded ends; ventral side 

 nearly straight, barely concave; rhaphe parallel to the ventral edge 

 but removed from it by a narrow hyaline space, not reflexed at the 

 ends; markings of massive, well separated, smooth costae, transverse 

 at the middle of the valve, increasingly radial and slightly curved 

 toward the ends, reaching to the rhaphe, but leaving the hyaline 

 band above mentioned along the ventral edge; this edge marked with 

 a single row of fine beads. 



Length 0.072; width 0.017; lines 6 in 0.01 mm., measured on the 

 dorsal side. 



