FRESH-WATER DIATOMS FROM ICELAND 39 



*Amphora ovalis Ktz. Gl. Syn. II, 104. V. H. Trt, Tab. 1, fig, 15. 

 159 samples (S. 38, S.W. 37, N. W. 14, N. 22, E. 44, s. 1. 4). Hot 

 springs: 6. 



Area: Ubiquist, Grl., B. E., Spb. 



Var. Pediculus Ktz. Cl. Syn. II, 105. V. H. Trt. 1. c., fig. 19. 

 41 samples (S. 14, S.W. 14 N. 5, E. 8). Hot springs: 3. 

 Area: Ubiquist, B. E., Fz. J. 



Amphora perpusilla Grim. Cl. Syn. II, 105. V. H. Trt., Tab. I, fig. 12. 



Vik (S.) H. Js., Grimsey (N.) O. D. 

 Area: Ear., Af., As. 



Subgenus Halamphora Cl. 1895. Cl. Syn. II, 117. 



*Amphora coffgeiformis Ag. Cl. Syn. II, 120. V. H.Trt., Tab. I, fig. 6. 



6 samples, all S. Hot spring: 1. 

 Area: Ubiquist, Grl. 



Amphora dubiosa sp. nov., Tab. nost. IV, fig. 59. 



Long: 20 /(, lat: 8 /<, 



Valva semilanceolata, apicibus valde capitatis. In parte apicali 

 valvae stria3 duae raphoidese adsunt. Structuram ullam valvse per- 

 spicere non potui. 



Spinstadir (S.) A. F. 



Owing to the amphora-like shape and the two striae, resembling 

 raphes, of this small form, I have classed it with Amphora. Possibly 

 it is closest related to A. Normani Rabh. 



Amphora Normani Rabh. Cl. Syn. II, 119. V. H. Trt., Tab. I, fig. 4. 



Sy<Vi Garrtar (S.W.) H. Js. 

 Area: Eur., Af., As., Am., Fz. J. 



Amphora protracta Pant. var. gallica Herib. He-rib. Auv. Ill, 61, 

 Tab. XIII, fig. 1. 



8 samples (S. 3, S.W.I, N.I, E. 3). Hot springs: 2. 

 Area: Eur., Am. 



Amphora veneta Ktz. Cl. Syn. II, 118. A. S. All., Tab. XXVI, figs. 

 7480. 



4 samples (S. 1, S.W. 1, N. 1, E. 1). Hot spring: 1. 



Mastogloia Thwaites 1848. Cl. Syn. II, 142. 



Mastogloia elliptica Ag. var. Dansei Thw. Cl. Syn. II 5 152. V. H. 

 Trt., Tab. II, fig. 64 (M. Dansei). 



13 samples (S. W. 2, N.W.I, N. 4, E. 6). Hot springs: 5. 

 Area: Eur., Af., Am., Aust. 



