CARPENTER ON THE STUDY OF THE FORAMINIEERA. 337 
Genus 1. Squamulina. Genus 
„ 2. Cornuspira. 
3. Nubecularia. 
4. Yertebralina. 
5. Miliola. 
Hauerina. 
„ 6. Fabularia. 
Family III. Lituolida. —Shell made 
sandy particles 
7. Peneroplis. 
8. Orbiculina. 
9. Alveolina. 
10. Orbitolites. 
11. Dactylopora. 
12. Acicularia. 
Genus 1. Trochammina. 
2. Lituola. 
up of an aggregation of 
Genus 3. Yalvulina. 
Sub-order 2. PEEFOBATA. 
Shell always calcareous, vitreous, with numerous scattered pores, through 
which the pseudopodia are protusible. 
Family I. Lagenida. —Shell finely tubular, hard, and glossy, 
frequently overlaid by non-perforate exogenous growths. Chambers 
more or less flask-shaped, each having a central, circular, often 
elongate aperture, the margin of which is usually everted or radiate. 
Septa single, prominent, not differentiated in structure from the rest 
of the shell-wall. No canal-system or intermediate skeleton. 
Genus 1. Lagena. 
Entosolenia. 
2. Nodosarina. 
Nodosaria. 
Cristellaria. 
Intermediate forms. 
5 ) 
Genus 3. Orthocerina. 
4. Polymorphina. 
5. IJvigerina. 
Family II. Globigerinida. —Shell coarsely perforate. Septa 
single or double, each with a crescentic aperture. 
Genus 1. Orbulina. 
,, 2. Ovulites. 
„ 3. Spirillina. 
Sub-family Globigerince. 
Genus 4. Globigerina. 
„ 5. Pullenia. 
,, 6. Sphteroidina. 
„ 7. Carpentaria. 
Sub-family Textularinw. 
Genus 8. Textularia. 
„ 9. Chrysadilina. 
„ 10. Cuneoliua. 
Genus 11. Bulimina. 
,, 12. Cassidulina. 
Subfamily Rotalince. 
Genus 13. Discorbina. 
„ 14. Planorbulina. 
15. Pulvinulina. 
16. Eotalia. 
17. Cymbalopora. 
18. Calcarina. 
19. Tinoporus. 
20. Patellina. 
21. Polytrema. 
V 
Family III. Nummulinida. —Shell usually symmetrical, dense, 
finely perforate. Septa completely differentiated and (save in Am- 
phistegind) double. A perture a narrow, continuous, or interrupted 
cleft. Intermediate skeleton and canal system highly developed. 
