On the nomenclature of the Foraminifera. Pt. III. The species enumerated by Von Fichtel and Von Moll / by W.K. Parker and T.R. Jones.
- William Kitchen Parker
- Date:
- 1860
Licence: Public Domain Mark
Credit: On the nomenclature of the Foraminifera. Pt. III. The species enumerated by Von Fichtel and Von Moll / by W.K. Parker and T.R. Jones. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
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![like outline. In these, as in Dcndritina, the aperture is single and lobulate. The name Spirolma has been given to these attenu- ated varieties. Other Foraminifers, especially some varieties of Lituolce, presenting similar elongate shells with a spiral com- mencement, have been included under the same name, thus adding to a eonfusion of nomenclature. Peneroplis is eharacteristically a creature of warm climate, and does not exist in the North Atlantic, Gei’man Ocean, English Channel, and other north temperate seas. We fully agree with Prof. Williamson that the few specimens which he mentions and figures in his ‘Monograph^ are strangers to the British Fauna. Since writing the above, we have been favoured with the valuable and beautifully elaborate memoir on Peneroplis, Oper- culina, &c., by Dr. Carpenter (Phil. Transact. 1859), and must refer our readers to that as a source of correct and detailed in- formation respecting the forms under notice, the structure and tissue of which are therein described in a masterly manner; whilst they are most elegantly and copiously illustrated by some of George WesPs best lithographs. Peneroplis planatus is well figured by Ehrenberg, both as to its shell and its sarcode, in the ‘Abhandl. Akad. Berlin,^ 1838 (1839), pi. 2. figs. a~d] and its Spiroline forms, under the name of “ Coscinospira (Spirolina) Hemprichii,” are also well de- lineated on the same plate, figs, a, b. 31. Nautilus aduncus. Page 115, pi. 23. figs. a-e. Recent: Red Sea.^^ This elegant Foraminifer, now known by the generic name Orbiculina, which was instituted by Lamarck, has been of late years fully described and illustrated by Prof. Williamson (Trans. Microscop. Soc. 1st ser. vol. iii. p. 120) and by Dr. Carpenter (Phil. Trans. 1856, vol. cxlvi. p. 547, pi. 28. figs. 1-22, and pi. 29. figs. 1-3). To the latter we are indebted not only for a succinct histoiy of this species, and for a clear exposition of its structural characters, but also for the bold and masterly exposi- tion of the true philosophical principles on which the zoological relations of this and other species of Foraminifera are to be studied. This ear-shaped Orbiculina adunca is doubtless the typical form, as compared with the further and extreme step in development by the increase and extension of the peripheral ^ambers, which produces suborbicular discoidal shells, bringing Orbiculina into close parallelism with the typically cyclical Orbt tollies. The cyclical forms of Orbiculina may be often the result of continued growth of individuals under favourable circum- stances; but frequently small starved forms quickly take on the cyclical condition, leaving the young sublenticular stage with-](https://iiif.wellcomecollection.org/image/b2234407x_0027.jp2/full/800%2C/0/default.jpg)
