502 CLEVE,' DIATOM S. 



central is much larger than the others. Strice extremely fine, 

 about 36 in 0,oi mm, (sec Grunow) marginal. Length 0,o83 

 mm. Breadth 0,oog mm. Very rare in the Labuan material. 



— PI. 37, fig. m. 



N. Sigma var. intercedens Grun. (Casp. Sea. Alg. pag. 22). 

 Pun eta 7, stri?e 30 in 0,oi mm. 



N. oUusa W. Sm. Very long and slender form v»'ith 10 

 pun eta and 27 strife in 0,oi mm. 



N. (Homoeodadia) Vidovidii Grun. (Van Heurck Svn. PI. 

 LXVII, fig. 7) 



N. vitrea Norm. (Grun. Arct. Diat. pag. 93). Puncta 

 7, strife 24 in 0,oi mm. Length 0,i mm. Breadth 0,oo8 mm. 



N. lanceolcda W. Sm. var. with 10 puncta and 26 strife in 

 0,01 mm. Length 0,o8 mm. Breadth 0,oi mm. 



N. longissima (Breb.) Ralfs. (Van Heurck Svn. PI. LXX, 

 fig. 1-2). 



N. ventricosa Kitton (M. M. Jour. Nov. 1873, pag. 206, PI. 

 XXXVIII, fig. 5). 



Surirdia fastuosa Ehb. (A. Schm. Atl. PI. V, fig. 10—13). 



S. cuneata 0. Witt (A. Schm. Atl. PI. IV, fig. 1)/ 



Campylodisciis amhiguus Grev. (A. Schm. Atl. PL XVIII, fig. 23). 



(7. mididatus Grev. (A. Schm. Atl. PI. XVIII, fig. 11)." 



var. hiangidatus Grev. (A. Schm. Atl. PI. XIV, fig. 18). 



C. Tlmretii Breb. a very small variety. 



C. parvidus (W. Sm.?) Van Heurck (Syn. PI. LXXVII, fig. 2). 



C. JRaJfsii Sm. (A. Schm. Atl. PI. XIV, fig. 3). 



CampyJodiscus(?) cocconeiformis Grun (CI. & Moll. Diat. No 

 178 and 214). Length 0,02 — 0,o36 mm. Breadth 0,oi8 — 0,o28 mm. 



— PL 38, fig. 78. 



Flagiodiscus oiervcdus Grun. (M. J. 1877, pag. 172, PL CXCIV. 

 fig. 9). 



Baderiastrum varians Laud. (Van Heurck Syn. PL LXXX, 

 fig. 3-6). 



CJicBtoceros diversns CI. (Van Heurck Syn. PL LXXXI, fig. 5). 



Ch. xteruviamis Btw. (M. J. IV, pag. 107, PL VII, fig. 16 

 -18). 



Podosira hormoides Mont. (Van Heurck S3'n. PI. LXXXIV, 

 fig. 3). 



Melosira sulcata Ehb. 



3Idosira Jahuensis CI. N. Sp. — Valve as high as broad, 

 rounded at the end, covered by puncta arranged in straight 

 lines, radiating from the apex to the suture, 18 in 0,oi mm. 

 Height of valve 0,oo8 mm. Breadth 0,oi2 mm. — PL 38, fig. 84. 



