338 Messrs. W. K. Parker and T. R. Jones on the 



would appear contradictory; and he proposes "vulgaris^^ as the 

 typical name. Taking L. sulcata^ as the characteristic form of 

 the group, for the reasons already referred to, we think the 

 varietal names IcBviSy squamosa, &c., whether expressing modifi- 

 cation or absence of the ornament, will not be contradictory, 

 and that a new specific name will not be required. 



(D. a, b) . Figs. 63 and 64 represent the common and well- 

 known Rotalia-f Beccarii, recognized as this species by Walker 

 and Jacob. They make the following remarks : " The colour, 

 while the fish is alive, is a fine pellucid crimson ; when dead, is 

 white. It is found alive on the Fucus vesiculosus, and is a very 

 common shell on all the coast, and seems to be a universal lit- 

 toral one, by the numbers found at Rimini and in the sand of 

 the South Seas.'^ The sinistral and dextral positions of the spire, 

 which appeared to be an important feature to Walker and Jacob, 

 are non-characteristic in ForaminiferaJ. 



(E.) Fig. 65 is the common Polystomella crispa. This also 

 was recognized as a Linnsean species by Walker and Jacob. They 

 observe: ''The finest specimens are from Sheppey: not un- 

 common. ^^ 



(F. a.) Fig. 66 is a variety of Cristellaria Calcar, rapidly en- 

 larging in its whorls, ribbed, and keeled ; approaching ysly. Cassis. 

 This was from Sheppey, and most probably a fossil specimen 

 from the London Clay of that island. 



(F. b.) Fig. 67 is Cristellaria Calcar, orbicular and smooth. 

 "From Sandwich and Seasalter : not common.^' We find it to 

 be not uncommon in the recent state on the Kentish coast. 

 Prof. Williamson mentions many other British localities for it. 

 A large form occurs abundantly in the Tertiary sands and clays 

 of Kent ; and probably Montagu's specimen, ' Test. Brit. SuppL' 

 p. 75, pi. 18. figs. 7 & 8, "from the Boysian Collection,'^ was one 

 of these fossils. 



(F. c). Fig. 72 is a very young Cristellaria, probably of the 

 Margin uline or crozier-hke growth. " From Seasalter and Sand- 

 wich ; very rare." 



(P. d.) Fig. 73 is a well- developed, strongly ribbed, Marginu- 



* Kanmacher's application of Jacob and Walker's MS. names sho-uld 

 be strictly adhered to ; and sulcata must be taken as the specific name. 



Among Prof. Williamson's synonyma of his Lagena vulgaris a part only 

 of Walker's diagnosis is quoted; S.{L.) sulcata is referred to "Adams, 

 1787," instead of Kanmacher, 1/98; and Turton's S. Lagena (Linn. Syst. 

 vol. iv. 1802, p. 609) is omitted. 



t We agree with Prof. Williamson in discarding the name Rosalina, the 

 differences once thought to exist between the two forms having very little 

 value. 



X Prof. Williamson has some good remarks on this point at p. 49 

 of his Monograph. 



