200 '^TEl^KA NOA'A" EXPEDITION. 



Rare, best at Stations 5 and (i. A buddinfr (" plastogamic "') sjJccinien at tlie latter 

 Station. 



515. Discorbina vihnhboava (d'Orbigny). 



Rosalina rilardchoaiia^ d'Orbiguy, 18.39. FAM. j). II. pi. vi, figs. 13-15. 

 Di<corhina ,. Hcroii-Ailt-n and Eaiiand, I'Jll, etc. FKA. 1915, p. G92. 



Stations 4-(5, 27 (+ K. d. J.). 



Poor specimens, hardly typical, the best at Station G. 



[Arenaceous isomorpli, Trochaiiitiiiiia sqiiaiiHt/a. J. & 1'. {'.), and Valvulhia fusca, 

 (Will.).] 



510. Discorbina peruviiuia (d'Orbigny). 



Rosalina pcruriaiia, d'Orbigny, 18.39, FA:\i. y. 11. pi. i, fig.s. 12-14. 



Discorbina ,, Hcrnn-Allcu and Earhnul, 1913, CI. p. 122, jjI. xi, figs. 1-3. 



Stations 6. 27 ( + Iv. d. J.). 



The be.st at Station 27, where it is fairly frequent. 



517. Discorbina rosacea (d'()rl)iguy). 



I\iit(iliii(i rosacea, dOrbignv, 1826. T.MC. p. 273. no. 15, ]\Iodi'li' no. 39. 

 Biscorhiiia „ Heron-Allen and l<]arland, I'.Ul. etc.. FKA. 1915, p. (i92. 



Stations 1-G. 8. 10. 11. l(i, 2(i. 45. 50, 53, oo ( + E. d. J., D.). 

 Universally distributed, the best at Stations 4. 0. and 26. A sessile specimen 

 at Station 6. At Stations 45 and 50 a tendency to the formation of chitinous shells. 



518. DiscorbiiKi Uaccala, Heron-Allen and Earland. 



Discorbina baccala, Heron-Allen and Earland, 1913, CI. i'. 121. pi. xii. tig.s. 1-3; 1910. FWS, 

 p. 271 ; 1910. FSC. p. 50. 

 Stations 2, 3, 5. 

 Recent at Station 5, fossils at Stations 2 anil 3. Rare. 



519. Discorbina turbo (d'Urbigny). 



liolalia {Trochulina) turbo, d'Orbigny, 1826, T.MC. p. 271, no. 39, JIodiMe no. 73. 

 Discorhina turbo, Heron-Allen and Earland. 1911, etc., FKA. 1915. p. 693. 



Stations 2, 3, 5, 6, 26. 53 (+ R. d. .1.). 



The best at Stations 5 and 6. A budding specimen at Station 0. Fossils at 

 Stations 2 and 3. The most southerly specimen is rather depressed, being 

 intermediate between D. turbo and D. rosacea. 



520. Discorbina orbicularis (Terquem). 



Rosalina orbicularis, Tenjuem, 1875, etc., APD. 187G, p. 75, pi, ix, fig. I. 

 Discorbina ., Heron-Allen and Earland. 1911. etc, FKA. 1915 p. 693. 



Stations 2. 3, .5. (;. 



