376 On the Classification of Recent Brachiopoda. 



52. Crania anomala, Mull, sp., Zool. Dan. 1776. C. norvegica, 

 Sow. Th. Conch, pi. 73. fig. 15-17. 



Hab. Scotland, adhering to stones, &c. in deep water in Zet- 

 land, in 20 fathoms off Arran, in from 30 to 80 fathoms in Loch 

 Fyne, &c. ; also in North Sea. 



53. Crania rostrata, Hoeningh., 1328 ; Sow. Th. Conch, pi. 73. 

 fig. 12-14. 



Hab. Mediterranean. 



XIII. Genus Orbicula, Cuvier, 1789. 



Shell horny ; upper valve limpet-like, without any internal 

 processes ; ventral or lower valve perforated for the passage of 

 the pedicle, and furnished with a central process for the attach- 

 ment of the ciliated arms. 



54. Orbicula lamellosa, Brod. Zool. Proc. 1833, p. 124; Sow. Th. 

 Conch, pi. 73. fig. 1. 



Hab. Coast of Peru. 



55. Orbicula Icevis, Sow. 1818; Trans. Zool. Soc. vol. viii., and 

 Sow. Th. Conch, pi. 73. fig. 2, 3. 



Hab. Off Conception, Chili; attached to Mytili ; depth 6 

 fathoms. 



56. Orbicula Cumingii, Brod. Zool. Proc. 1833 ; Sow. Th. Conch. 

 pi. 73. fig. 6. 



Hab. Payta, St. Elena and Panama. 



57. Orbicula strigata, Brod. Zool. Trans, vol. i. pi. 23. fig. 1, 

 1833 ; Sow. Th. Conch, pi. 73. fig. 7. 



Hab. Island of Canna, Guatemala, Malacca, &c. 



58. Orbicula striata, Sow. 1818, Trans. Zool. Soc; Sow. Th. 

 Conch, pi. 73. fig. 8. 



Hab. Unknown. 



59. Orbicula tenuis, Sow. 1846 ; Sow. Th. Conch, pi. 73. fig. 4, 5. 

 Hab. Unknown. 



60. Orbicula Evansii, Dav. 1852; Zool. Proc. 1852. 



Hab. Bodegas. 



7. Family Lingulid^e. 



Almost equivalved, rudimentary branchiae developed from the 

 mantle. 



