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



more numerous than in D. vesicularis ; fossil in Piedmont and 

 Italy." Defrance mentions also having obtained three recent 

 forms referable, he thinks, to Discorbis. 



13. Discorbites vesicularis, Lamarck. Diet. xiii. p. 346, xxxii. 

 p. 186; Atlas, Conch, pi. 14. f. 3; Blainv. Malac. pi. 6. f. 2. 

 This is Discorbina Turbo, D'Orb., var. vesicularis ; the same as 

 Rotalia Gervillii, D'Orb. See Ann. Nat. Hist. ser. 3. v. p. 293, 

 and Carpenter's ' Introduction,' p. 204. 



14. Discorbites vesicularis. Atlas, Conch, pi. 13. f. 3; Blainv. 

 Malac. pi. 5. f. 3. This figure probably represents a. Dendritina, 

 that is, a Nautiloid form of Peneroplis planatus, F. & M. sp. 



15. Fabularia Discolithus, Z>e/r. 1820. Diet. xvi. p. 103; 

 Atlas, Zooph. pi. 48. f. 5 ; Blainv. Actinol. pi. 73. f. 5. "Alveolite 

 grain de millet." Fossil, from Grignon ; and a flattened variety 

 from Valognes. See Ann. Nat. Hist. ser. 3. v. p. 471. This 

 Fabularia from Grignon was figured by Fortis in his Memoir on 

 Discolithi, Mem. Nat. Hist. Italie, ii. pi. 2. f. Z, 1, 2, p. 109 

 {Discolithus IX.), and was named Nummulites ovata by De 

 Eoissy, Hist. Nat. Mollusques, 1804, v. p. 59 ; hence De Roissy's 

 is the oldest specific name, and the species should stand as 

 Fabularia ovata. 



A full account of Fabularia is given by Dr. Carpenter in his 

 introduction,' p. 82 &c., pi. 6. f. 37, 38. 



16. Fabularia sph^roides, Defr. 1820. Diet. xvi. p. 103. 

 Fossil, from Chaumont. Given as a variety of the foregoing by 

 Defrance. 



17. Frondicularia complanata, Defr. 1824. Diet, xxxii. p. 178; 

 Atlas, Conch, pi. 14. f.4; Blainv. Malac. p. 371, pi. 6. f. 4. 

 This is a fine large Frondicularian form of Nodosarina ; fossil ; 

 probably from Italy. 



It was also termed Renulina complanata by De Blainville 

 (xxxii. p. 178). "Renulina'-' was also applied by him {loc. cit.) 

 to the reniform variety of Vertebralina= V. operciilaria (see Ann. 

 Nat. Hist. ser. 3. v. p. 471), a very diff"erent form. 



Frondicularia complanata is one of the most beautiful of the 

 Foraminifera, and often of a relatively large size in the Italian 

 Tertiary clays and sands, and in those of Malaga, San Domingo, 

 and the Vienna Basin. The Chalk, Chalk-marl, and Gault 

 have numerous individuals of varieties of this form, but they are 

 of less size than those of the Tertiary deposits. Similar forms, 

 but still smaller, are also common in several of the older clays 

 of the Secondary epoch. In the recent state it is not common, 

 but occurs of full size at Jamaica (the late Mr. L. Barrett's 

 dredgings) ; and we have met with a long narrow Frondicularia 

 (like F. sti'iatula, Reuss) in Commander Dayman's dredgings, 

 made in July 1859, off Lisbon, at 700 fathoms. Prof. William- 



