476 OLEVE, DIATOMS. 



P. rhomhoides CI. (A. D. pag. 14, PI. IV, fig. 73) Kara, 

 Cape Wankarema, F. J. L. 



var. angustior Grun. — F. J. L. 



P. Stuxbergii CI. & Grun. (A. Diat. pag. 54, PI. IV, fig. 74) 

 F. J. L., Kara, Cape Wankarema. 



var. ? hyperborea Grun. (transv. strise 22 ^/a oblique 25 Va 

 in 0,01 mm.) 



P. distortum W. Sm. (Syn. I, pag. 67, PI. XX, fig. 210) 

 Spitsb. (longit. strise 28, transverse 25 in 0,oi mm.). 



P. Fasciola W. Sm. (Syn. I, pag. 67, PI. XXI, fig. 211) 

 Greenl., Finm., Spitsb., Kara. 



var. sulcata Grun. (A. Diat. pag. 55, PI. IV, fig. 75) Spitsb., 

 Kara. 



var. tenuirostris Grun. (A. Diat. pag. 55, PI. IV, fig. 76) 

 Kara. 



P. lalticum W. Sm. (Syn. I, pag. m, PI. XXII, fig. 207) 

 Spitsb. 



P. WanshecM Donk. (T. M. S.~ VI, pag. 24, PI. Ill, fig. 7) 

 Kara. 



P. macrimi W. Sm. (Syn. I, pag. 67, PI. XXXI, fig. 276) Kara. 



P. prolongatum W. Sm. (Syn. I, pag. 67, PI. XXII, fig. 212) 

 Spitsb., Kara. 



P. tenuissimum W. Sm. (Syn. I, pag. 67, PI. XXII, fig. 213) 

 Spitsb., Kara. 



var. suhtilissima Grun. (A. Diat. pag. 58) Kara. 



var. hyperborea Grun. (I. c.) Kara, Cape Wankarema. 



P. Spenceri var. borealis Grun. (A. Diat. pag. 60, PI. IV, fig. 

 79) Kara. 



Of P. Spenceri I found in a sample from Hackluyts, Spitsb., 

 a variety with 19 transverse and 24 longitudinal strise, length 

 0,n, breadth 0,oi3 mm. In the Wankarema gatherings occurs 

 another variety with 20 transverse and 26 longit. strise in 

 0,01 mm., length 0,o85 mm., breadth 0,oo8 mm. 



P. vitreum CI. (A. D. pag. 15, PI. IV, fig. 78) Kara, Cape 

 Wankarema (transverse strise 19, longit. 20 in 0,oi mm.). 



P. glacials CI. N. S. — Sigmoid, acute, med. line almost 

 straight. Longit. and transverse strise 28 in 0,oi mm. Length 

 0,143. Breadth 0,oi9 mm. — PL 35, fig. 13. — Cape Wankarema. 



P. staurophoruni Grun. A. Diat. pag. 61) Greenl. (Davis 

 Strait). 



DonJcinia carinata (Donk.) Ralfs (Donkin T. M. S. VI, pag. 

 23, PI. Ill, fig. 5) Greenl. (Davis strait. Length 0,i mm. Breadth 

 0,02 mm. Oblique strise 18 in 0,oi mm.) Finm. 



