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



Polytrypa was referred by Defrance to the "Polypiers k 

 reseau;" and his specimens were obtained from the Eocene Ter- 

 tiaries of France. He acutely observed that the individuals 

 "vary according to the localities.^^ From Grignon he had it 

 5 lines long and about 1 line thick ; from Orglandes (Manche) 

 half as thick again, and shorter; from Villiers, near Grignon, 

 scarcely a line long; and from Mortefontaine (Oise), from the 

 Gres marin superieur, 4 lines long, not half a line in diameter. 

 He justly remarks that "these are probably varieties of one 

 species " — a conclusion at which we have arrived by a careful 

 examination of numei'ous specimens, as explained in the Ann. 

 Nat. Hist. ser. 3. v. pp. 473 &c., where Polytrypa, Larvaria, and 

 Dactylopora are shown to be one. See also Carpenter^s ' Intro- 

 duction,' p. 127 &c. 



116. Pyrgo Isevis, Befr. 1824. Diet, xxxii. p. 273; Atlas, 

 Zool. pi. 88. f. 2 ; Bl. Malac. p. 482, pi. 62 bis, f. 2. Referred by 

 De Blainville to the Pteropods. This is the common Miliola 

 (Biloculina) ringens. Lam., var. buUoides, D'Orb., and was regarded 

 by Defrance as belonging to the same group (the Sphcerulacea of 

 De Blainville). 



117. Renulina complanata, Defr. sp. Diet, xxxii. p. 178. 

 This is Blainville's name for Frondiculaina complanata, Defrance 

 (which see). 



118. Renulina opercularia [opercularis] , Lam. Diet, xxxii. 

 p. 178; Bl. Malac. p. 371. See Ann. Nat. Hist. ser. 3. v. 

 p. 476 for an account of this curious and rare variety of Verte^ 

 bralina; also Carpenter's ^Introduction,' p. 74, pi. 5. f. 18. 

 Blainville's term " Renulina" is not required. 



119. Rotalites Cidarollus, BL [Cidarollus plicatus, De M.). 

 Diet, xxxii. p. 187. A common variety of Pulvinulina repanda. 

 It is R. pulchella, D'Orb., Modeles, no. 71. Ann. Nat. Hist. 

 ser. 3. vi. p. 340. 



120. Rotalites Cortalus, Bl. {Cortalus Pagodus, De M.). 

 Diet, xxxii. p. 187. Quite indeterminable. See Ann. Nat. Hist, 

 ser. 3. vi. p. 340. 



121. Rotalites lenticulina,Zam. Diet. xlvi. p. 302. Probably 

 a variety of Discorbina Turbo. See Ann. Nat. Hist. ser. 3. v. 

 p. 294. 



122. Rotalites depressa, Lam. Diet. xlvi. p. 303. Probably 

 one of the Truncatuline varieties of Planorbulina farcta. 



123. Rotalites discorbula. Lam. Diet. xlvi. p. 303. This is 

 Hotalia Beccarii, Linn. sp. 



124. Rotalites Storillus, Bl. {Storillus radiatus, De M.). 

 Diet, xxxii. p. 187. An indeterminate Rotaline. See Ann. Nat. 

 Hist. ser. 3. vi. p. 341. 



125. Rotalites (et Rotulites) trochidiformis, Lam. Diet, xxxii. 



