OlS THE aEl^FS EAMULINA. 345 



3. Ramulina aculeata, Wright, 1886. 

 {Non d'Orbigny's Dentalina aculeata.^ 

 Figs 23-42. 

 Specific Characters. — Test free ; composed of subangiilar, in- 

 flated segments connected by stout, curved or rarely straight 

 stolon-tubes. The segments almost invariably stow a septate 

 division of the interior ; the septa, however, nearest the stolon- 

 tubes are always interrupted in tbe centre, tbus forming a 

 valvular or constricted entrance to the tubes. The walls of the 

 test much thicker than in R. glohuUfera. Surface of test bears 

 numerous strong prickles or tubercles ; and these appear to be 

 formed of non-tubular shell-material. 



" Small flask-like objects, curiously echinulate," Williamson, 

 1847, Mem. Lit. Phil. Soc. Manchester, vol. viii. p. 78, pi. iv. 

 figs. 73, 74. Named Dentalina aculeata in the same work for 

 1872, ser. 3, vol. v. p. 136. — Test pyriform, and irregularly 

 compressed. Oral apertures prominent, and probably once 

 connected with stolon-tubes. Surface covered with strong 

 prickles. Chalk-marl ; Kent. 



Lagena distoma-aculeata, Parker and Jones, 1865, Phil. Trans. 

 vol. civ. pt. 1, p. 348, pi. xviii. fig. 5. — An irregular flask- 

 shaped segment, with an attenuated neck. The surface of 

 the test decorated with blunt prickles or rounded processes. 

 Eocene ; Grignon, Paris. — Pig. 23. 



Lagena aspera, Eeuss, Brady, 1884, ' Challenger ' Eep. vol. ix. 

 p. 457, pi. Ivii. fig. 12. — This subglobose specimen differs 

 from L. aspera, Eeuss, to which species Brady refers it, by 

 being compressed and inequilateral, and by haviug a narrow 

 oblique tubular aperture at one end and a blunt eccentric 

 projection at the other. The " euto- and ectosolenian " 

 characters are not apparent. The surface is finely tuber- 

 culate. Locality ? Eecent.— Pig. 24. 



LINK. JOURN". — ZOOLOGY, VOL. XXVI. 25 



