the Nomenclature of the Foraminifera, 189 



dilatdta. In outline it much resembles fig. 24, pi. xxix., which 

 is also named Gram, plnnula ; but the latter is Textilarian in 

 the arrangement of its chambers. Fig. 15, Proroporus ? cla- 

 vulina^ is a strongly built Bolivina dilatata, corresponding 

 with Bolivina incrassata of Reuss, which he has found in the 

 Chalk both of Lemberg and of Riigen. 



Fig. 16, Sagrina crelo'^ is a large, pouting, lipped Bigenerina^ 

 with a rough shell of globose chambers. It presents a stage 

 of growth further than that of '"'' Loxostomiim tumens^'' pi. xxviii. 

 fig. 25 (Geol. Mag. no. 89, p. 508), having become quite 

 uniserial, and thus passed into the subgenus Bigoierina ; but 

 its necked and rimmed aperture gives it the further distinctive 

 characters of the subgenus Heterostomella, Reuss. The slight 

 tuberculation visible on the edge of the figm-e indicates suf- 

 ficiently the habit of growth so much more fully exposed in 

 the blunt spines of //. acideata (Ehr.), to which we refer also 

 pi. xxvii. figs. 21 & 22, and pi. xxviii. figs. 25 & 26, on ac- 

 count of the tendency they sliow to take on the extension of 

 the neck and its marginal thickening. 



Fig. 17, Gramviostomum? decwrenSy is a beautiful and 

 characteristic Virgulina squamosa. Fig. 18, Pohjmorphina 

 nucleus* y is a variety of Virgulina HempricMi^^ having a 

 tendency towards Cassidulina. Fig. 19, Pleurites calci2)arusy 

 is a Textilariform variety of Virg. Hemp-ichii. Figs. 20, a, i, 

 Strophoconus ovum^ is a small Virg. Schreihersii. Fig. 21, 

 8t7'. cepa, being dark-shelled, is probably Virg. Hemprichii^ 

 young. Figs. 22, a, J, Sphctiroidina genimulay=- &ph. hulloides^ 

 well figured. Figs. 2^-}, «, J, Eotalia glvlmlosa (1838), figs. 24, 

 a, />, li. leptospira^ and fig. 25, P. pertusa, are either young 

 Planorlndinoi or young Globigerinw ; in this state they are 

 with difficulty distinguishable. Figs. 23 & 25 resemble the 

 early chambers of Glohigerincej as shown in figs. 26 & 38 ; 

 fig. 24 may be PI. glohulosa (Ehr.) . Figs. 26, a, h, Phnnerosto- 

 mum asperunij is decidedly Glohigerina cretacea of the sub- 

 discoidal type. Fig. 27, Rotalia ohscura^ = Cristcllaria rotulata, 

 or a feebly keeled Or. cultrata^ like Cr.2rroducta,Yon Hagenow, 

 from Iliigen. Fig. 28, Platgo'cus? squama, seems to be a 

 variety of Pulvinulina r&panda, and near to Pulv. spatiosa 

 (Ehr.), pi. xxi. fig. 95, and pi. xxix. fig. 15. Fig. 29, Planulina 

 annulosuy ■=.Planorhulina ammonoides. Fig. 30, Planulina po- 



* This is entered with doubt among the synonyms of Volymorphina 

 rottmdata in the " Monograph of FoUjmorphina,^'' Linn. Soc. Trans, vol. 

 xxvii. p. 234 ; but, together with several other Elirenbergiau species re- 

 ferred to in that Monograph, will have to be erased. 



t For an account of this species, see also ' Geol. Mag.' no. 89, pp. 508, 

 509. 



