86 GOKS, RET1CULARIAN RIII/OPODA OF THE CARIBBEAN SKA. 



Valvulina triangularis D'ORB., forma Clavulina angularis D'ORB. 



Tab. XI, fig. 387389. 



Our form seems to be identical with Clavulina tricarinata D'ORB. from the West- 

 Indies; but it is much larger, sometimes attaining 3 mm. in length. The trigonal cir- 

 cumference is not at all a constant feature in this form, for Clavulina nodosaria D'ORB. 

 from the same locality is unquestionably a Valvulina but of cylindrical shape and not 

 distinct from the tricarinate form. 



I am far from being able with any satisfactory degree of certainty to identify all 

 of D'ORBIGNY'S Clavulina species, but most of them display an arrangement of their 3 or 

 4 serial stage more in accordance with the plan of growth of Valvulina than of the more 

 regular type of Text, triquetra. In our form the septal impressions are ordinarily very 

 strongly marked, particularly on the flat sides, where they become changed into broad 

 semilunar transverse furrows. The angles of the chambers are often somewhat pro- 

 duced. The shell-substance is finely agglutinated of chalk-matter. It is not common 

 in the coralline-gravel. 



Fig. 387: the edge side; 389: the flat side; 389: the aperture. 



a) rotaliseformis, plus minusve conica: 



Syn. Valvulina triangularis D'ORB., 1826, Tab. meth.; An. Sc. Nat. 7, p. 270. Mod. N:o 25. 

 FRICS Mod. N:o 5. 



PARK, and JONES, 1857, For. Coast, of Norway; An. Mag. Nat. Hist. (2) 19, 



p. 209, t. 11, figg. 1510. 



CARPENTER, 1860, Introd. t, 11, tigg. 15 16. 



Rotalina fusca WILLIAMS., 1858, Brit. rec. forf. p. 55, figg. 114 115 (sec. CARPKNTEK). 



Valvulina austriaca D'ORB., 1846, For. Bass. tert. p. 181, t. 11, figg. 7- 8. 



triangularis vav. conica PARK, and JONES, 1865, North. Atl. and Arct. Oc.; Phil. Trans. 



155. 1, p. 406, t. 15, fig. 27. 

 ? allomorphinoides Rss., 1859, Westph. Kreidef.; Wien. Ak. Sitz.-Ber. 40, p. 223, t. 11, 



fig. 6. 

 ? bulloides BRADY, 1876, Carbonif. and Perm, foramf.; Pal. Soc. 30, p, 89, t. 4, figg. 



1215. 



? plicata BRADY, ibid. p. 88, t. 4, fig. 10. 



? rudis BRADY, ibid. p. 90, t 3, figg. 1920. 



b) buliminsuformis: 



CARPENT., Introd. t. 11, figg. 19, 25. 

 Valvulina gibbosa D'ORB., 1839, For. Craie blanc. Par.; Mem. Soc. geol. Fr. 4, p. 38, t. 4, 



figg. 12. 

 parvula v. MUNST., globularis v. MUNST. 1838, ROM., Tert. Meeress. N. Deutschl.; Leonh. 



u. Bronn. Jhrb. 1838, p. 387, t. 3, figg. 4142. 

 Oviedoana D'ORB., 1839, Cuba p. 103, t. 2, figg. 2122. 

 spicula Rss., 1845, Bohm. Kreicle 1, p. 37, t. 13, fig. 69. 



