526 PROFESSOR GREGORY ON 



and lateral segments approaching in form to those of A. granulata. But on care- 

 ful comparison, it seems very doubtful whether this form do not belong to a dif- 

 ferent species. As I have not yet had time to ascertain this precisely, I give it 

 here cum nota. 



A. granulata is tolerably frequent in the Loch Fine dredging I have named as 

 being so rich in species of Amphora, especially of complex Amphorce. I would 

 observe that in this form the striation of the lateral segments is finer than that 

 on the middle bars, whereas in the next species the reverse is the case. A. 

 granulata sometimes attains a considerably larger size than in the two un- 

 doubted specimens here figured. 



97. Amphora cymbifera, n. sp. PI. XIV., figs. 97, 97 b, 97 c. Form of frus- 

 tule elliptic, rather broad, with very short, produced, and truncate apices. Length 

 0-0025" to 0-0045" ; breadth in the middle, 0-0012 to 0-0016". Lateral segments 

 highly arcuate on the dorsal, almost straight on the ventral margin, the former 

 being suddenly contracted at the ends, so as to produce round heads, with very 

 short necks ; thus the segments are capitate. Their form is elongated, and the 

 curve regular and graceful. They are marked by somewhat coarse stria?, slightly 

 inclined. Stria? about 22 in 0-001". The nodules are on the inner margin, or 

 just within it, and the inner lines are parallel to that margin, and close to it. 

 The segments, when detached, as is seen in one of the figures, exactly resemble 

 the frustules of an elegant Cymbella. Between the lateral segments lie from five 

 to seven convergent bars, and, in one focus, the whole frustule is seen to be made 

 up of these bars (fig. 96 b), which are marked by fine transverse stria?, consider- 

 ably finer than those on the lateral segments, which became stronger and coarser 

 near the margin, as may be seen by the figures. The bars, as in A. sulcata (fig. 

 91), appear to be separated by furrows, and in a certain focus these furrows may 

 be seen marked by lines of short transverse stria?. Fig. 96 is the same frustule 

 as that in 96 b, focussed so as to show the lateral segments. Fig. 96 c, is a de- 

 tached segment. 



This fine form is not unfrequent in the Loch Fine dredging above mentioned. 

 The views of it are so different, according to its position, and the detached seg- 

 ments are so like Cymbellw, that it was some time before I could see my way 

 among these forms, especially mixed as they were with frustules and segments 

 of the preceding, as well as of the next species, which have a similar structure. 



98. Amphora proboscidean, sp. PI. XIV., figs. 98; 98 b\ 98 c; 9% d. Form 

 of frustule nearly rectangular in the middle, contracted near the ends to truncate 

 extremities. Length from 0-003" to 0-005" ; breadth from 0-001" to 0-0015". The 

 longer specimens are narrower than those of middling length. Lateral seg- 

 ments arcuate on the dorsal, often slightly convex, or undulated, on the ventral 

 surface, contracted at the ends so as to be capitate, the heads having longer necks 

 than in the preceding species, which are bent forward at a very obtuse angle. 



