Nomenclature of the Foraminifera. 471 



illustrates it (under the name of Q. saxorum) by his Modele 33, 

 and in the ' Ann. Sc. Nat/ vii. pi. 16. f. 10-14. Its walls are 

 thick, elegantly marked outside with furrow-like pits, and 

 coarsely grooved within (see d'Orbigny's fig. 13), the sarcode 

 bearing but a small proportion to the shell-substance. The 

 aperture is very much contracted, and its tongue is small. 

 Sometimes the internal ridges of the chambers, coming up into 

 the mouth of the shell, and coalescing with the lingular flap, 

 form a sieve-like septal plane. This cribriform condition occurs 

 only in one other subspecies of Miliola, namely the Hauerina 

 (see the H. compressa*, D'Orb. For. Foss. Vien. p. 119, pi. 5. 

 f. 25-27). 



Fabularia, a somewhat gigantic and nearly allied Rhizopod, 

 built upon the plan of the Miliola, but having the internal 

 structure of Alveolina, also presents this kind of aperture. 



Some of the Calcaire grossier is principally made up of Q. 

 saxorum and its varieties. 



Q. saxorum, unadorned with pitting, is not uncommon among 

 the coral-reefs of the warm seas of Australia and New Zealand. 

 Other forms, with modified ornament (such as Q. zigzag, D'Orb. 

 For. Foss. Vien. pi. 19. f. 16-18) are not uncommon. Defrance 

 remarks that a recent Miliola, resembling Q. saxorum, had been 

 received from New Holland (Diet. Sc. Nat. xxxi. p. 69). 



27. Miliolites opposita. Ann. Mus. v. p. 353, No. 6 ; ix. pi. 17. 

 f. 5. "Fossil; Pontoise." (Grignon and Piedmont, Defrance, 

 Diet. Sc. nat. xxxi. p. 69.) 



This is a slightly modified individual of M. saxorum. The 

 figure is placed with those of the latter, and included under the 

 same name, in the Tabl. Enc. Meth. pi. 469. f: 3. 



28. Miliolites birostris. Ann. Mus. v. p. 355, No. 7. " Fossil ; 

 Chaumont." Apparently a very small, delicate, elongate variety 

 of M. saxorum, such as we find extremely common in the Pari- 

 sian Tertiary beds. 



29. Renulina. Ann. Mus. v. p. 353; Hist. Anim. s. Vert, 

 vii. p. 605. Renulites opercularia, Ann. Mus. v. p. 354; ix. 

 pi. 17. f. 6. R. opercularis, Tabl. Enc. Meth. pi. 465. f. 8. 

 "Fossil; Grignon." 



This is a rare form of Vertebralina, under an extreme varietal 

 condition. Resembling at first sight an OrUculina, or some- 

 thing that might possibly be a Peneroplis^, the true character 



* D'Orbigny has figured this as having one small oval aperture sur- 

 rounded by large granules ; but in reality these latter are elevations around 

 small passages which have probably been filled up by fossilization. We 

 have Hauerina from the Indian, Australian, and other tropical seas. 



f It is catalogued as Peneroplis opercularis by D'Orbigny, Tabl. Ceph. 

 Ann. Sc. Nat. vii. p. 286, No. 6. Renulites and Renulina appear as syno- 

 nyms of Peneroplis in Williamson's ' Monograph,' p. 44, and in other works. 



