Nomenclature of the Foraminifera. 19 



and in the Cuban figures we have examples of the type of the 

 genus, though in a somewhat exceptional condition. 



Model no. 3. Frondicularia rhomboidalis, D'Orb. Page 256, no. 1. 



Hab. Adriatic. PI. I. fig. 31. 



A variety of Frondicularia complanata, Defr. The lozenge- 

 shaped form of Frondicularia in which the lateral wings of the 

 later chambers reach back only about half the length of the 

 shell. 



Model no. 4. Vaginulina tricarinata, D'Orb. Page 258, no. 4. 



Hab. Adriatic. PL I. fig. 34. 



A three-sided Nodosaria, with somewhat oblique chambers, 

 and having a keel along each of the three edges. A similarly 

 modified form is found fossil at Baden, near Vienna, and is de- 

 scribed and figured by Dr. Karrer as Rhabdogonium pyramidale, 

 Kar., in his valuable paper on the distribution of the fossil 

 Foraminifera of the Vienna Basin (Sitzungsber. Math.-nat. 

 Class. K. Akad. Wiss. vol. xliv. 1861, p. 20, pi. 1. fig. 5. 



We have met with V. tricarinata recent in Mediterranean 

 sands, in which, however, it is very rare. It also occurs in a 

 fossil condition, sparingly, in Tertiary clay from near Malaga, 

 and in the Subapennine Tertiary shell-sands. 



Model no. 5. Nodosaria (Dentalina) obliqua, D'Orb. 

 Page 254, no. 36. 



Hob. Adriatic. PL I. fig. 32. 



A Dentaline Nodosaria, with broad and oblique chambers, the 

 aperture being terminal, somewhat towards the convex side of 

 the slightly curved shell. 



This is a common form, both recent and fossil, and is scarcely 

 separable from D. communis, D'Orb. 



Model no. 6. Marginulina Raphanus*, Linn. sp. Page 258, no. 1, 

 pi. 10. figs. 7, 8. 



Hab. Adriatic ; fossil at Castel-Arquato, Italy. PL I. fig. 35. 



The Marginuline condition of Nodosarina Raphanus, and the 

 best type of the group. The straight N. Raphanus is the N. 

 Rapa of D'Orbigny. 



Model no. 7. Textularia pygmtea*, D'Orb. Page 263, no. 13. 



Hab. Adriatic. PL II. fig. 59. 



Another small variety of Textularia agglulinans, subsequently 

 described, no. 15 (p. 263), and named T. aciculata, is identical 

 with this, and must be included under the same name. 



2* 



