De Lautouk. — On a Dlatomaceous Deposit. 305 



Plate XXIII.— 



Fig. 16. Triimcria ventricosa, Gr. and St., n. sp. (Primary valve.) 

 „ 17. „ „ „ „ (Secondary valve.) 



„ 18. Pseudo-rutilaria monile, Gr. and St., n. sp., n. gen. 

 „ 19. Hcmicmlus ornithocephabis (?), Grev., var. (?). (Frustule.) 



rin this figure half of the adjoining valve is drawn, show- 

 ing its beak-like claw or spine, by which the opposite 

 valves are attached.] 

 „ 20. Kittonia elaborata, Gr. and St., n. sp., n. gen. 

 „ 21. Navicula margino-p7inctata, Gr. and St., n. sp. 

 „ 22. Triccratium harbadense (?), Grev. 



„ 23. Aulacodiscus sollitiamis, Norm., var. nova-zealandica, Gr. 

 and St., n. var. 



List of Diatoms found by Messrs. Grove and Sturt in the 

 Diatomaceous Ooze from Cormack's Siding, Oamaru, and 

 published in the " Quekett Journal " (alphabetically ar- 

 ranged). 



Actinoptychus nitidus, Grun. (Heliopelta nitida, Grev.). 



A. pidchcllus , Grun., var. teuera. 



A. simhirskiamis, A. Schm. 



A. splendens (Shadbolt), Ealfs. 



A. {splendens, var.?) glahratus, Grun. 



A. {glahratus, var.?) clegantulus, n. sp., Gr. and St. 



A. 2indulatiis, Ehr. 



A. {undulatus, Ehr., var.?) constrictus, n. sp., Gr. and St. 



A. vulgaris, Schum., var. macidata, n. var., Gr. and St. 



A. luittiamis, Janisch. 



Amphipropra rugosa, Pet. 



A. (?) cornuta, Chase. 



Amphora cingidata, Cleve. 



Amp. contracta, Grun. (var.?) 



Amp. crassa, Greg. 



Amp. furcafa, Lend. Fort. 



A7n2). interlineata, n. sp., Gr. and St. 



Amp. labuensis, Cleve. 



Amj]. obtiisa, Greg. 



Amj). (sp. ?) 



Amp. subpunctata, n. sp., Gr. and St, 



Amp. tesselata, n, sp., Gr. and St, 



Ananias birostratus, Grun. 



An. (?) siibconstr ictus, Gr. and St., n. sp. 



Anthodiscus floreatus, n. sp., nov. genus, Gr. and St. 



Arachnoidiscus ehrenbergii, Bail. 



Arach. indicus, E. 



Asterolampra decora, Grev. 



Ast. marylandica, Ehr. 



Ast. uraster, n. sp., Gr. and St. 



