F. KITTON ON SOME NEW DIATOMACE JS, 21 



Nitzschia socialis, Greg. 



,, annularis, W. S. 



,, sigma, W. S. vara. 

 HantzscMa marina, Donk. Scaice. 

 Pleurosigma balticum, W. T. 



„ formosum. W. T. var. Broad, with blunt ends. 



,, elongatum, W. T. Small form. 



Podosira maxima, K. 



,, ,, minima, Grun. 



Pyxidicula cruciata, E. ? Scarce. 

 Phabdonema crozierii, E. 

 Phaplwneis surirella, E. 

 Rhizosolenia hebetata, Bail. Scarce. 

 Stictodiscus calijornicus, Grev. Rare. 

 Surirella fastuosa, E. 



„ striatula, Turp. var. Narrow, resembling S. gemma in outline. 



,, gemma, E. 

 Sxjnedra affinis, K. var>. 

 Triceratium arctieum, E. 



,, scxdptum, Shad. var. ? A central spine. (Qy., T. macidatum, 



Kitt., V.H., 112, 9, 10, 11.* 



A considerable number of Freshwater species were observed, which 

 were more numerous in some preparations than in others. 



Caitipylodiscus noricus, E. Bare. Cymbella, two or three species, Epi- 

 themia turgida, Navicula rhomboides, E. JS\ amphigomphus (firma), E. 

 N. commutata, Grun. Surirella splendida and vars. S. spiralis, S. W., 

 not uncommon ; S. nobilis, scarce ; Nitzsclda (Hantzschia) amphioxys, 

 Tabellaria, &c, &c. 



UNDESCRIBED SPECIES FROM OTHER LOCALITIES. 



Surirella carinata, n. sp., F. K. Valve panduriform, apices 

 broadly rounded, aire slightly produced, costre reaching to pseudo, 

 raphe margin striate. Length, '0055" ; breadth, "0036 ; width at 

 construction, -0026. Dredging — Lat., 20*1 S. ; long., 57*25 E. ; 

 depth, -1350 fms. — PI. IV., Fig. 5., a-b, longitudinal and trans- 

 verse sections (ideal). 



The small quantity of material at my disposal yielded several 

 valves, and fragments of valves, these showed very little variation in 

 outline or markings. The centre of the valve has a longitudinal 



* I have seen a form like the species figured in Schmidt's "Atlas," PI. 

 LXXYL, Fig. 11, which is a var. of T. sculptum. — F. K. 



