64 



E. GROVE AND G. STDRT ON 



T. pileolus, xzw.juilaiirfica, Grim. — A small form agreeing with 

 Granow's description and figure ("F. J. L.," p. 16, PI. B, Fig. 56), 

 excepting in the presence of a central spine. Hare. 



ACTINOPTTCHEJ!. 



Actincptyckua splendens (Shadbolt), Ralfs. (in "Prit.," p. 

 840). — Differs in no respect from recent examples. Not fre- 

 quent. 



A. (splendens var. ?) glctbratus, Gran. (" Van Heurck Synop.," 

 PL 120, Figs. 6-9). — Through the kindness of L. Hardman, 

 Esq., we have seen one specimen corresponding very nearly to 

 the figure of var. incisa (I.e., Fig. 9.) 



A. vulgaris Schum., var. maculata, n. var., Gr. and St.- — This 

 variety comes nearest to var. australis, Grun. ( " Van Heurck 

 Synop.," PI. 121, Fig. 8), but differs in the size and arrangement 

 of the apparent spots, especially in the symmetrical group in 

 each compartment containing the process. The group of en- 

 larged cells in the striated margin, opposite to each process, 

 is also a remarkable feature. Diam. about "005". Not un- 

 common. (PI. V., Fig. 5.) 



A. nitidus, Grun., (Heliopelta nitida Grev., " T. M. S.," Vol. 

 xiv, p. 5, PI. 11, Fig. 18). — A small form, resembling the above 

 in the character of its cellulation, is abundant. 



A. Wittti, Janisch. (A. Sch., " Atl.," PI. 100, Fig. 12).— Not 

 very rare, "004" to , 006" in diam., with finer markings than those 

 in Schmidt's figure. 



Adinodiscus barbadensis, Grev. (" T. M. S.," Vol. xi, p. 69, 

 PI. 4, Fig. 11). — Not very rare. Identical with Greville's form. 



Craspedoporus el eg ana, n. sp., Gr. and St. — This beautiful 

 diatom has all the characteristics of Greville's Genus (" T. M. 

 S.," Vol. xi, p. 68, PI. 4, Figs. 9 and 10), but differs from both 

 the species described by him. Valve convex, flattened at centre, 

 with from 7 to 10 large, transversely oval ocelli, each of which 

 is bisected vertically by a narrow septum or bar. The ocelli 

 are situated at the outer ends of pear-shaped clear spaces, which 

 are much shorter than in Greville's figure of C. ralfsii. General 

 surface granulate, the granules somewhat indistinct in the 

 centre but arranged in lines between the ocelli and ceasing 

 near the margin, where there is a clear annular space. Diam. 

 to -0035". Not very rare. (PI. V., Fig. 6.) 



