FORAMINIFEKA PEOM THE ABEOHLOS BANK. 227 



96. DlSCORBINA VILARDEBOANA, d'Orbigny, sp. 

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



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

 and two or three shells of the slightly dissimilar form known as D. vilardeboana at 

 47 fathoms. 



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

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



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



98. Discorbina bertheloti, 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 lobatula in some of the shallower soundings. 



99. Discorbina rarescens, Brady. 



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

 Rare; 260 fathoms. 



Planorbulina, d'Orbigny. 



100. Planorbulina mediterranensis, d'Orbigny. (Plate XLV. fig. 18.) 

 Planobulina mediterranensis, Chall. Report, p. 656, pi. 92. figs. 1-3. 



One or two specimens only, at 47 fathoms. 



101. Planorbulina acervalis, Brady. (Plate XLVI. fig. 11.) 

 Planorbulina acervalis, Chall. Report, p. 657, pi. 92. fi°\ 4. 



Bare; 260 fathoms. 



Truncatulina, d'Orbigny. 



102. Truncatulina lobatula, Walker & Jacob, sp. (Plate XLII. fig 20- Plate 

 XLV. fig. 26.) 



Truncatulina lobatula, Chall. Report, p. 660, pi. 92 fi°-s. 10 &c. 



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

 The broken Botaline 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. 



Bare; 260 fathoms. 

 vol. xii.— part vii. No. 3.— April, 1888. 2 l 



