POEAMraiFEEA FROM THE ABEOHLOS BANK. 227 



96. DiscOEBiNA viLARDEBO.\jrA, d'Orbigny, sp. 

 Discorbina vilardeboana, Chall. Keport, p. 645, pi. 86. figs. 9-12, &c. 



A few specimens oi Discorbina rosacea were found in the soundings at 31 fathoms, 

 and two or three shells of the slightly dissimilar form known as B. vilardehoana at 

 47 fathoms. 



97. Discorbina orbicularis, Terquem, sp. (Plate XLVI. fig. 1.) 

 Discorbina orbicularis, Chall. Report, p. 647, pi. 88. figs. 4-8. 



A few good examples at Station VI. ; 47 fathoms. 



98. Discorbina beetheloti, d'Orbigny, sp. (Plate XLVI. figs. 7, 8.) 

 Discorbina bertheloti, Chall. Report, p. 650, pi. 89. figs. 10-12. 



This species in its comparative abundance appears almost to replace its isomorph 

 Truncatulina lolatula in some of the shallower soundings. 



99. Discorbina earescens, Brady. 



Discorbina rarescens, Chall. Report, p. 651, pi. 90. figs. 2, 3. 

 Eare ; 260 fathoms. 



Planoebulina, d'Orbigny. 



100. Planoebulina mediteeranensis, d'Orbigny. (Plate XLV. fig. 18.) 

 Planobulina mecUterranensis, Chall. Report, p. G56, pi. 92. figs. 1-3. 



One or two specimens only, at 47 fathoms. 



101. Planoebulina aceevalis, Brady. (Plate XLVI. fig. 11.) 

 Planorbulina acervalis, Chall. Report, p. 657, pi. 92. fig. 4. 



Eare; 260 fathoms. 



Teuncatulina, d'Orbigny. 



102. Truncatulina lobatula, AValker & Jacob, sp. (Plate XLII. fig. 20; Plate 

 XLV. fig. 26.) 



Truncatulina lobatula, Chall. Report, p. 660, pi. 92 figs. 10, &c. 



Does not occur at the greatest depth ; otherwise generally diffused, but not abundant. 

 The broken Eotaline shell, fig. 16, of Plate XLV., appears to belong to this or some 

 allied species of Truncatulina. 



The adherent specimen, Plate XLII. fig. 20, shows the remains of the sandy envelope 

 which often completely encases the shell of Tr. lobatula in the parasitic condition. 



103. Truncatulina variabilis, d'Orbigny. (Plate XLV. fig. 17.) 

 Truncatulina variabilis, Chall. Report, p. 661, pi. 93. figs. 6, 7, 



Eare; 260 fathoms. 

 vol. XII. — part VII. No. 8. — April, 1888. 2 l 



