66 



E. GROVE AND G. STURT ON 



shown in Greville's figure. We much regret that, after a long 

 search, we have been unable to find the only authentic specimen 

 recorded in his slides, now deposited in the British Museum. 



ASTEROLAMPREJI. 



Asterolampra marylandica Ehr. (Grev. " T. M. S.," Vol. 

 viii, p. 108, PI. 3, Fig. 164).— Rare. 



A. decora, Grev. (" T. M. S.," Vol. x, p. 43, PI. 7, Fig. 6). 

 — Frequent. 



A. vulgaris, Grev. (Z.c, Fig. 19). Abundant. 



Arachnoidisce^. 



Arachnoidiscus Ehrenbergii, Bail. (" Atl.," PI. 73, Fig. 1). — 

 Typical, and agreeing with recent examples from California. 

 Diam. very variable, from # 0022" to 01". Not unfrequent. 



A. (Ehrenbergii var.?) indicus E. (I.e., PI. 58, Fig. 6). — Rare. 



Stictodiscus Hardmanianus, Grev., var. megapora, Gr. and St. — 

 Rather smaller than the type, and differing in the large size of 

 the clathrate cellules, surrounding the central ring of small 

 granules. This ring is occasionally obsolete. Diam. to , 0045' / . 

 Frequent. This form seems closely allied to Arachnoidiscus. 



8. calif amicus, Grev. var. areolata, Grun. (" Atl.," PL 74, 

 Fig. 1).— Diam. to -0075".— Not scarce. 



8. calif ornicus, var. nitida, Gr. and St. — A small form from 

 •002 v to '0035" in diam., dotted over with large shining 

 granules. Margin resembling the type-form, with short broad 

 lines of plication, and, in perfect specimens, a coarsely striated 

 rim. Frequent. (PI. V., Fig. 7.) 



Melosire^. 



Paralia sulcata (Ehr.), Cleve (Orthosisa marina, " S. B. D.," 

 Vol. ii, p. 59, PI. 53, Fig. 338).— Very frequent. 



Melosirasol. (Ehr.), Kutz. (" Van Heurck Syn.," PI. 91, Figs. 

 7, 8, and 9).— Frequent. 



M. clavigera, Grun. (Z.c, Figs. 1 and 2). — Frequent. 



M. borreri, W. S. (" Van Heurck Syn.," PI. 85, Figs. 5, 6, and 

 7). — A small disc about -002" in diam. with thick walls and 

 convex surf ace strewn with small scattered granules. Rare. We 

 place this here with some hesitation. 



M. Westii, W. S. (" S. B. D.," Vol. ii, p. 59, PI. 52, Fig. 

 333).— Frequent. 



