REPORT ON THE FORAMINIFERA. 
205 
cl. Stout crosier-shaped specimens, circular in section, PI. XIII. figs. 20, 21. 
Type — Peneroplis cylindraceus, Lamarck, sp. 
Nautilus ( Lituus ) arietinus (pars), Batsch, 1791, Conch, des Seesandes, p. 4, pi. vi. fig. 15, d.e.f. 
Spirolina ( Spirolinites ) cylindracea, Lamarck, 1804, Ann. du Museum, vol. v. p. 245, No. 2. 
Spirula cylindracea, Blainville, 1824, Diet. Sci. Nat., vol. xxxii. p. 190, — Malacol., p. 382, pi. v. fig. 1. 
Spirolina cylindracea, d’Orbigny, 1826, Ann. Sci. Nat., vol. vii. p. 286, No. 1 • — Module, No. 24. 
„ ( Spirolinites ) cylindracea, Defrance, 1827, Diet. Sci. Nat., vol. 1. p. 298, pi. xiii. fig. 1. 
„ clavata, Crouch, 1827, Illust. Introd. Lam. Conch., p. 40, pi. xx. fig. 8. 
Coscinospirci hemprichii, Ehrenberg, 1839, Abhandl. d. k. Akad. Wiss. Berlin for 1838, pi. ii. fig. 2, 
a.b., &c. 
Spirolina austriaca, d’Orbigny, 1846, For. Foss. Tien., p. 137, pi. vii. figs. 7-9. 
,, hemprichii, Parker, Jones, and Brady, 1865, Ann. and Mag. Nat. Hist., ser. 3, vol. xv. p. 230. 
„ lituus, Id. Ibid. vol. xvi. p. 35, pi. i. fig. 19. 
e. Long, delicate, crosier- shaped specimens, PL XIII figs. 24, 25 (1) 
Type — Peneroplis lituus, Gmelin, sp. 
Nautilus lituus, Linne and Gmelin, 1788, Syst. Nat., 13 ed., p. 3372, No. 13. i 
„ ( Lituus ) acicularis, Batsch, 1791, Conch, des Seesandes, p. 4, pi. vi. fig. 16, a.b. 
Spirolina longissima, Costa, 1856, Atti dell’ Accad. Pontan., vol. vii. p. 225, pi. xx. fig. 11. 
Peneroplis laubei, Karrer, 1868, Sitz. d. k. Akad. Wiss. Wien, vol. lviii. p. 154, pi. iii. fig. 8. 
f Stout nautiloid form, often with limbate sutures and without surface striation, Pi. 
XIII. fig. 14. 
Type — Peneroplis carinatus, d’Orbigny. 
Peneroplis carinatus , d’Orbigny, 1839, Foram. Amer. MMid., p. 33, pi. iii. figs. 7, 8. 
„ dubius, Id. 1839, Foram. Cuba, p. 79, pi. vi. figs. 21, 22. 
<j. Broad complanate variety, thin-shelled and without superficial striae, PI. XIII. 
figs. 12, 13. 
Type — Peneroplis lsevigatus, Karrer. 
« 
Peneroplis plana tus, var. loevigata, Karrer, 1868, Sitzungsb. d. k. Akad. Wiss. Wien, vol. lviii. p. 
153, pi. iii. fig. 7. 
Some of the earlier authors appear to have appreciated more fully than many who 
have written in later times the wide variation of form that must be embraced within the 
specific limits of Peneroplis pertusus. Batsch, amongst the earliest, recognised that 
between the broad ear-shaped shells and those of stout crosier-like contour, the whole 
interval was filled by gradational forms, so closely following each other that no line could 
be drawn that could be supposed to indicate a zoological division. There are other 
generic series of Foraminifera, concerning which the same sort of observation might be 
(ZOOL. CHALL. EXP, PART XXII. 1883.) Y 27 
