498 Ch^VE, DIATOMS. 



Amphiprora delicatida Grev. (Edinb. N. Phil. J. XVIII, pag. 

 39, fig. 15—16). Length 0,o75 mm. Breadth 0,oi5 mm. Striae 

 26 in 0,01 mm. 



Achnanthes javanica Grun. (Arct. Diat. pag. 18). 



A. seriata Grun. (Arct. Diat. pag. 19). 



Orthoneis finibriata (Btw.) Grun. (Van Heurck Syn. PL 

 XXVIII, fig. 3). 



0. Clevei Grun. (1. c. f. 4). 



0. hinotata Grun. (1. c. fig. 7). 



Cocconeis Scutellum Ehb. (Van Heurck Syn. PI. XXIX, fig. 

 1—12). 



C. heteroidea Hantzch (Ost Ind. Arch. Diat. pag. 21, fig. 10). 



C. pseudomarginata Greg. (Van Heurck Syn. PI. XXIX, fig. 

 20—21). 



C. dirupta var. flexella Grun. (Van Heurck Syn. PI. XXIX, 

 fig. 16). 



Epithemia Musculus Ktitz. (W. Sm. Syn. I, pag. 14, PI. I, 

 fig. 10). 



Plagiogramma (caribseum var.?) Labuense CI. N. Sp. — Valve 

 constricted in the middle, where there is a large annulus. 

 Transverse septa in the ends not distinct. Median raphe 

 distinct. Strise, composed of separate puncta, 11 in 0,oi mm. 

 Length 0,05 mm. Breadth 0,oii mm., at the constriction 0,oo7 

 mm. — PI. 37, fig. 62. 



P. Seychellarum Grun. iji litt. — Valve elliplic with rounded 

 ends. Centre with a large annulus, ends without costee. . Strise 

 fine, transverse, absent in the middle and at the ends, 18 in 

 0,01 mm., composed of fine puncta forming oblique lines (16 

 in 0,01 mm.). There is a distinct median raphe. Length 0,075. 

 Breadth 0,oi3 mm. — PI. 37, fig. 59 a, b. 



P. interruptum var. adriatica Grun. (Van Heurck Syn. PI. 

 XXXVI, fig. 1)? Transverse striae 26 in 0,oi mm. composed 

 of puncta forming longitudinal striae, 26 in 0,o] mm. Median 

 raphe distinct. Length 0,056 mm. Breadth 0,oo8 mm. — PI. 

 37, fig. 61 a. b. 



P. decussatum Grev. (T. M. S. XIV, pag. 1, PI. I, fig. 22). 



P. obesum Grev. (M. J. VII, pag. 211, PI. X, fig. 12—13). 



P. tenuistriatum CI. N. Sp. — Elliptic with rounded ends. 

 Central annulus large; no costae at the ends. Striae transverse, 

 18 in 0,01 mm., composed of distinct puncta, which also form 

 longitudinal lines. Length 0,o32. Breadth 0,oi mm. — PI. 37, 

 fig. 63. 



P. pygmceum Grev. (M. J. VII, pag. 211, fig. 11). 



