1.72 MESSRS. E. HERON-ALLEN AKD A. EARLAND ON THE 



273. Discorbina mediterranensis (d'Orbigny). 



Rosalina mediterranensis, d'Orbigny, 182(5, TMC. p. 271. No. 2. 

 Discorbina mediterranensis, Foruasini, 1898, RFI. p. 264 (fig.). 



Heron-Allen & Earland, 1913, CI. p. 118, pi. ix. figs. 12-14, and pi. x. 

 fig- 1. 

 6 Stations. 



Very sparingly distributed, but good and typical specimens at Stns. 6 and 15. This 

 species is also one of those revived for taxonomicil purposes {ut supra). It has 

 probably been included by other authors under D. globularis and D. rosacea. 



274. Discorbina globularis (d'Orbigny). 



Rosalina globularis, d'Orbigny, 1826, TMC. p. 2/1. No. 1, pi. xiii. figs. 1-4, Modele No. 69. 

 Discorbina globularis, Brady, 1884, FC. p. 643, pi. lxxxvi. figs. 8, 13. 



25 Stations. 



Universally distributed, often very abundant. There is, as usual, a great variation in 

 the height of the shell and the character of the inferior surface. Free-growing specimens 

 are, as a rule, smaller and more inflated than those of sessile origin, many of which are 

 very flat and regular, and have the base almost plane. The sessile specimens are also, 

 as a rule, more coarsely perforate than the small free type. 



275. Discorbina obtusa (d'Orbigny). 



Rosalina obtusa, d'Orbigny, 18 46, FFV. p. 179, pi. xi. figs. 4-6. 

 Discorbina obtusa, Brady, 1884, FC. p. 644, pi. xci. fig. 9 a, b, c (?). 



10 Stations. 



Fairly widely distributed and moderately frequent. The specimens are usually very 

 small, but large and typical examples occurred at Stns. 7, 22, and 23. 



276. Discorbina polyrraphes (Eeuss). 



Rotalina polyrraphes, Reuss, 1845-6, VBK. pt. i. p. 35, pi. xii. fig. 18. 



Discorbina polyrraphes, Heron-Allen & Earland, 1913, CI. p. 128, pi. xii. figs. 10-13 (not 14). 



5 Stations. 



Occasional specimens at a few Stns. only. The best at Stns. 4 and 18. Its minute 

 size has probably caused it to be overlooked in many British gatherings. 



277. Discorbina chasteri, Heron-Allen & Earland. 



Discorbina minutissima, Chaster, 1892, FS. p. 65, pi. i. fig. 15. 



„ chasteri, Heron-Allen & Earland, 1913, CI. p. 128, pi. xiii. figs. 1-3. 



11 Stations 



Widely distributed, but never more than an occasional specimen, except at Stns. 4 

 and 13, where it was fairly frequent. All the specimens are of the original circular 

 type. Prior to our records from Clare Island (ut supra) and from the North Sea 

 (H.-A. & E. 1913, NSH. p. 136) this species had only been recorded by Gough from 



