82 ME. H. N. RIDLEY ON THE 



Fam 1. Ctmbelle^. 



1. Amphora marina, W. Sm. = A. liueolata, Kuetz. 

 Specimens similar to that in Schmidt's Atl. d. Diatk. pi. xxvi. 



fig. 81, and approaching A. acutiuscula, Kuetz, Rare. 



2. Cymbella obtusa, Greg. (?). 



Girdle aspect only observed. Length 'OS mm. ; breadth '006 mm. 

 Markings 6 to 8 in '01 mm. Eare. 



3. C. AMPHICEPHALA, Naecj. 



Length "02 mm. ; breadth "006 nmi. Eare. 



4. CoccoNEMA, sp. ? 



Close to C. australicum^ A. Schmidt. One fragment. 



Fam. 2. Nayicule^. 



5. Nayicula laciniosa, a. Schmidt. 



Similar to Java sjiecimens, but the extremities slightly more 

 acute. Length '02 mm. ; breadth at widest areas -0075 mm. Pew. 



6. N. SUBULA, Kuetz., var. Grun. (Ver. Wien. Ak. ISCO, p. 548, 

 pi. i. fig. 24). 



Length -0375 mm. ; breadth '005 mm. Eare. 



7. N. coccoNEiFORMis, Kuetz. 



Length '015 mm. ; breadth -0075 mm. Eare. 



8. N. MUTicA, Kuetz. 



Length -015 mm. ; breadth '0075 mm. Few. 



9. N. Weissplogii, A. Schmidt. 



Similar to specimens from Sandwich Islands. Length '0175 

 mm. ; breadth '0075 mm . Eare. 



10. N. sp.? 



Length "0875 nim. ; breadth '0085 mm. Markings not visible 

 owing to the presence of detritus. One specimen. 



11. N. BRASiLiENsis, Gritn. 



Length -025 mm. ; breadth '0175 mm. Few. 



12. N. MiNUscuLA, var. bahusiensis, Grun. 



Length -025 mm. Markings obscure. Fragmentary. One 

 specimen. 



13. N. ERYTHR^A, Gruu. 



Length '08 mm. ; breadth at middle •0325 mm. Striae 8 in 

 •01 mm. Eare. 



