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 lavis, 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 ForauiiniferaJ. 



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

 was recognized as a Linnrean 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 var. 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 

 Marginuline or crozier-like growth. " From Seasalter and Sand- 

 wich ; very rare." 



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



* Kaninacher's application of Jacob and Walker's MS. names should 

 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 Kaurnacher, 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. 



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

 of his Monograph. 



