j -g AMPHORA. 



Gregory's figure is very bad and renders the diatom scarcely recognizable. 

 My description is made from an example from the Balearic Islands, 

 determined by Mr. Grunow. The same remark applies to the figure given 

 in my plates. 



A. Eunotia Cleve (Diat. Arct. Sea, 1873, p. 21, pi. 3, f. 17*), 

 plate 24, fig. 684. 



Frustule complex, oval, broadly truncate, raphe straight. Valves coarsely 

 striate, with strise moniliform, about 6 in j c.d.m., consisting of very 

 fine puncta, grouped, compact, about 9 in 1 c.d.m. Central nodule 

 rounded, very distinct. Length, about 8 c.d.m. ; breadth, 5 c.d.m. 



North Sea ; Greenland ; Spitzbergen ; Finmark, etc. (Cleve). 



A. binodis Greg. (Diat. of Clyde, p. 38, pb 4, f. 67*), plate 24, 

 tig. 686. 



Frustule linear-oblong, with apices attenuate-truncate, median portion 

 constricted. Raphe fiexuous, bi-arcuate. Striae about 14 in i c.d.m. 

 Length, about 4-5 c.d.m. ; breadth, 1-25 c.d.m. 



Marine Coasts of Scotland (Greg.) ; England (Stolterfoth). 



A. turgida Greg. (Diat. of Clyde, p. 38, pi. 4, f. 63*), plate 24, 



fig. 685. 



Small, suborbicular-lanceolate, with apices rostrate, more or less capitate. 

 Valves with dorsum very convex, venter flat, apices diminuate, rostrate, sub- 

 capitate. Striae, 7 to 9 in 1 c.d.m., consisting of coarse puncta, somewhat 

 distant and interrupted near the dorsal margin by a hyaline line, more or 

 less conspicuous, following the outline of the valve. Length, 2-5 to 7 c.d.m. 

 Breadth, 1-25 to 2 c.d.m. 



Maiine Lamlash Bay ; Loch Fine (Scotland, Greg,) ; England (Stolterfoth). 



6. Calamphora CI. Ventral portion of valve smooth, furnished with 

 a longitudinal line (or rib). Dorsal portion without rib and furnished 

 with transverse striae, indistinctly punctate, or with costiform striae 

 alternating with indistinct beads. (Type form : A. formosa CI.). 



A. limbata CI. and Grove. (Le Diatomiste i., p. 159), plate 

 35, fig. 908. 



Frustule rectangular, somewhat constricted in the middle, showing on 

 each side a hyaline line which appears to come from the dorsal part. Valve 

 narrow, linear with subcapitate apices and arcuate raphe ; dorsal portion 

 striate, 8 strias in i c.d.m. ; ventral portion without striae, but with a longitudinal 

 line. Connecting zone with 5-8 divisions, transversely striated, striae about 

 8.5 in 1 c.d.m. Length of frustule, 4-5 to 7.5 c.d.m. Breadth, 2 to 3.5 c.d.m. 



Marine Grip (Norway, Cleve.) 



