3*8 



CAMPYLOSTYLUS. 



Alongside of the Syncdra must be placed l\vo small genera of secondary 

 importance and somewhat doubtful position. 



GENUS 41. CAMPYLOSTYLUS 

 SHADB., 1849 (Manuscript). 



Only one species. 



:?i 



Fig- 74- . 

 Campyh'tylus striatus. 



C. StriatUS Shadb. M.S. (Synedra Nor- 

 mania Grev. in Q.J.M.S., 1862, ii., n.s., p. 231, pi. 

 10, f. 1-3). 



Valves curved, clavate, somewhat twisted, some- 

 times inflated like a club at one of the apices, and 

 very 'gently attenuated into a long prolongation 

 at the other, sometimes more or less longly 

 attenuated at the two apices ; transverse stria; 

 excessively delicate, about 13 in 1 c.d.m., finely 

 divided transversely, interrupted by a pseudoraphe, 

 very narrow, more or less eccentric on one portion 

 of the valve, and terminating in a pseudo-nodule. 

 Length, 15 to 45 c.d.m. Breadth at the inflation, 

 .5 to -75 cd.m. 



Marine. Has been found in the London Docks, on mahogany 

 logs, first by Shadbolt who made a good pure gathering, then by 

 Norman whose gathering was principally composed of Melosira 

 valves, 



Note.- Greville was mistaken in making a 

 Synedra of this curious diatom, the appearance of 

 which is quite peculiar. Greville's figures are very 

 indifferent, and he has noted neither the tortuosity 

 of the valve, nor the pseudo-raphe, nor the ter- 

 minal nodules, details which might not be noticed 

 with the objectives which Greville had at his 

 command in 1862. 



