602 MESSES. E. HEEON-ALLEN AND A. EAELAND ON THE 



15 Stations. 



Universally distributed, often very common and attaining splendid dimensions, the 

 best and largest being at Stns. 3, 9, and ^ X. Deformities at Stn. I. Very rare at 

 Stns. 7 and 8. 



114. Peneroplis carinatus d'Orbigny. 



Peneroplis carinatus d'Orbignj^ 1839, FA^I. p. 33, pi. iii. figs. 7, 8. 

 „ dubius d'Orbigny, isSQ, PC. p. 62, pi. vi. figs. 21, 22. 



„ carinatus Brady, 1884, FC. p. 205, pi. xiii. fig. 14. 



14 Stations. 



Less generally distributed and, as a rule, small and poorly developed as compared 

 with the other varieties. At Stu. '( B a specimen was observed with punctate surface. 

 This punctation of the surface is not uncommon in some of the varieties, notably in 

 F. cylindraceus and in the subgenus Monalysidiiim., but we have not noticed it before 

 in P. carinatus, which has usually a thick and polished surface. 



115. Peneroplis arietinns (Batsch). 



Plancus, 1744, op. cit. (Note, p. 599) pi. xxxviii. fig. d. 

 Plancus, 17G0, op. cit. (ibid.) pi. i. fig. X (0). 

 Spenglei-, 1781, op. cit. (Note, p. 597) p. 370, pi. i. fig. 4a-(/. 

 Schroter, 1784, op. cit. (Note, p. 599) p. 317, pi. i. fig. 9. 

 Batsch, 1791, CS. p. 4, pi. vi. tig. 15 rf-/. 



Blainville, 1825, op. cit. (Note, p. 598) p. 382, pi. v. (1827) fig. 1. 

 d'Orbigny, 1826, TMC. p. 286, No. 1. Spirolina cylindracea, Modele no. 24. 

 Peneroplis planatus Parkei-, Junes, & Brady, 1859, etc., NF. 1865, p. 26, pi. i. fig. 18. 

 arietinus Brady, 1884, FC. p. 204, pi. xiii. figs. 18, 19, 22. 

 „ „ Chapman, 1900, FLF. p. 179. 



14 Stations. 



Fairly generally distributed, but never very abundant, the best specimens. being at 

 Stn, 9. Very small at Stn. 3 and very rare at Stns. 7, 8, ^X, and IB. At Stn. 4 only 

 one typical example, but a variety occurred in which the last few chambers suddenly 

 expanded in width so as to form a bell-shaped expansion at the end of the normally 

 parallel-sided test. The species passes almost imperceptibly into P. cylindraceus. 

 ( Vide Introductory Note.) 



116. Peneroplis cylindraceus (Lamarck). 



Spengler, 1781, op. cit. p. 380, pi. ii. figs. d-f. 



Nautilus acicularis Batsch, 1791, CS. p. 4, pi. vi, fig. 16 «, b. 



Spirolinites cylindracea Lamarck, 1804, AM. vol. v. p. 245, vol. viii. 1806, pi. Ixii. fig. 16. 



„ ,, Lamarck, 1823, Recueil des Planches, pi. xiv. fig. 15. 



Spirolina pedum d'Orbigny, 1826, TMC. p. 287, no. 5. 



„ longissima Costa, 1853, etc., PRN. 1856, p. 225, pi. xx. fig. 11. 



Peneroplis cylindraceus Brady, 1884, FC. p. 205, pi. xiii. figs. 20, 21. 



