26 GOÉS, RETICULARIAN RHIZOPODA OF THE CARIBBEAN SEA. 



Nodosarina commiinis dOrb. 



Tab. I, figg. 11 — 16. 



This wide-spread species has been aptly arranged by Parker and Jones in four 

 sub-types of varieties. The difference betweeii them is, as usual, much too slight and 

 inconstant to justify their being distinguished as species with a nomenclature of 

 their own. 



a) crassa, septis horizontalibus. Nod. radicute prosima, {— Dental, brevis d'Orb.). 



b) longa, tennis, septis horizontalibus. Nod. radicula3 var. monili propinqua 

 (= Dent. communis, elegans, Lorneiana, Boueana etc. d'Orb.). 



c) crassa, septis obliquis. Nod. legumini Lin. valde propinqua (= Dent. obliqua 

 d'Orb. [non Lin.], Dent. nana Reuss.). 



d) longa tenuis, septis obliquis; etiam Nod. legumini quam maxime afBnis (= Dent. 

 communis, inornata, badenensis etc. d'Orb.). 



The great affinity between N. communis d'Orb. and N. legumen Lin. makes it 

 hardly possible to dispose fairly their many naraes in their resp. lists of synonyms. 

 It is also on reasonable grounds that Professor Williamson has not kept N. communis 

 distinct from N. legumen. 



It is very cominonly met with both among the Coralline-gravel and in the 

 Chalk-ooze; its slender, graceful form, its often pearly lustre and its great size (15 mm. 

 and more in length) distinguish this species as one of attractive beauty. 



Fig. 11 is a pygmean form near to Dent. brevis d'Orb. It is exactly the same 

 as Dent. linearis RöM., Dent. inermis Czjz. etc, from the Chalk-ooze. 



Fig. 12, 12 b comes near to Dent. Lorneiana d'Orb. or Dent. consobrina d'Orb., 

 it is a pigmy from the Chalkbottom. 



Hg. 13—14 are near to Dent. Boueana et aliis d'Orb. Both are from the Coral- 

 line gravel and the Chalk-ooze. 



Fig. 15 represents a highly developed Nod. communis from the Coralline-gravel. 



Fig. 16 comes nearest to Dent. badenensis d'Orb., from the Chalk-ooze. 



a) crassa: septis horizontalibus; N. radiculce propinqua. 



Syn. Nodosaria nuda Rss., 1862, Nordd. Hils u. Gault; Wien. Ak. Sitz.-Ber. 1. 46, p. 38, t. 2, 



figg. 8—9. 

 Dentalina brevis d'Orb., 1846, For. tert. Vienne, p. 48, t. 2, figg. 9 — 10. 



» » Park. and Jones, 1860, For. Cliellast. Qu. Journ, geol. Soc. 16,' p. 453, 



t. 19, fig. 23. 

 Nodosarina radieula, Dentalina communis subvar. brevis Park. and Jones, 1866, Crag. Foram.; 



PalcBOgr. Soc. 19, p. 63, t. 4, fig. 10. 

 Dent. pseudochrysalis Rss., 1862, Nordd. Hils u. Gault; Wien. Ak. Sitz.-Ber. 1. 46, p. 40, t. 2, 



fig. 12. 

 Dentalina chrysalina Corn., 1848, Nouv. foss. microsc. cret.; Meni. Soc. geol. Fr. (2) 3, p. 251, 



t. 1, fig. 21. 



