﻿RECENT AND TERTIARY BRACHIOPODA. 



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of Biscay, at depths of from 292 to 539 fathoms. It was also dredged by Mr. A. Adams 

 at Satanomosaki, Japan, in 55 fathoms. The shell has been found in the Post-Tertiary 

 clays of Norway, and was first noticed by Sir C. Lyell in his paper on the rising of 

 Sweden ('Phil. Trans.,' vol. for 1835, p. 36, pi. 2, figs. 32, 33), but without a specific 

 denomination. Hisinger mistook it for Terebratulina caput-serpentis in 1837. 



7. Platidia anomioides, Scacchi, sp. Dav., Introduction, p. 72, figs. 19, 20. 



Orthis anomioides (Scacchi), Philippi. Enum. Moll. Sicil., vol. ii, p. 69, pi. xviii, 



fig- 9. 



Morrisia — Dav., &c. 



Platidia — Costa. Fauna del Regno di Napoli, p. 48, pi. hi, fig. 4, and pi. 



iii bis, fig. G, 1852. 



This shell was dredged by Mr. Jeffreys during the 'Porcupine' Expedition of 1869 at 

 some little distance from the Shetland Islands, in 290 fathoms. It abounds in some parts 

 of the Mediterranean and iEgean Seas, and has been found fossil in the Upper Pliocene 

 rocks of Sicily. 



i 



8. Gwynia capsula, Jeffreys, sp. Dav., Supplement, PI. I, figs. 3 — 4 a. 



Terebratula capsula, Jeffreys. Annals and Mag. of Nat. Hist., 3rd series, vol. ii, 



p. 125, pi. v, fig. 4, 1859. 

 — — L. Reeve. Mon. of the Genus Terebratula, p. 10, fig. 39. 



Gwynia — King. Proc. Dub. Univ. Zool. Assoc., April, 1859, p. 258. 



Argiope — Jeffreys. Br. Conch., vol. ii, p. 21 ; vol. v, pi. xix, fig. 5. 



Much has been written with reference to this minute shell, and different opinions have 

 been expressed as to its generic position, but until its internal characters shall have been 

 anatomically examined and made clear it would be unsafe to refer it with certainty to 

 any of the described genera in particular. It is so minute, a mere speck so to say, that 

 an examination of its interior is exceedingly difficult, and especially so in dried-up 

 specimens. Dr. S. P. Woodward and myself spent a whole day at the British Museum 

 on the 27th of April, 1859, in endeavouring, with the aid of a good microscope, to find 

 some kind of calcareous support, but could find none, nor has any other naturalist who 

 has studied the shell, been more successful. In 1859 Prof. King proposed for this shell 

 the generic name of Gwynia, stating at the same time that " The principal generic character 

 is in the labial appendages being attached directly to the shell [first observed by Mr. 

 Jeffreys], and not to a loop, as in other genera of the family. The prominency of the 

 umbone of the small or receiving valve, the form, position, and (considering the size of 



