68 DE. T. DAVIDSON ON EECENT BEACHIOPODA. 



Figs. 13-13 b. Liothyris vifrea, var. minor, Philippi, from the Straits of Messina (Davidson Collection, 



Geol. Dept., British Museum). 

 Figs. 14-16. Liothyris vitrea, var. Davidsoni, A. Adams, from Satanomosaki, Japan. 14. (Davidson 



Collection, Geol. Dept., British Museum.) 16. Interior of dorsal valve. 

 Figs. 17, 18. Liothyris arctica, Friele, sp. 17. Exterior, of natural size. 18. Interior of dorsal valve, 



enlarged. (Davidson Collection, Geol. Dept., British Museum.) 

 Fig. 19. Liothyris cernica, Crosse, sp. : after Crosse's figure, Jouru. de Couch, vol. xvi. pi. i. fig. 3. The 



specimen was obtained near the Island of Mauritius, from the stomach of a fish. 

 Figs. 20, 21. Liothyris Bartletti, Dall, sp., from near Santa Cruz (Museum of Comp. Zool., Harvard). 



Plate II. 



Figs. 1-4. Liothyris Moseleyi, Davidson. \-lb. Exterior of the shell. 2. Interior of dorsal valve, to 

 show the loop. 3. Interior of ventral valve, enlarged, showing the muscles ; a, occlusor j 

 b, ventral adjustor ; c, divaricator ; m, mantle ; n, dorsal pallial nerves ; d, dorsal pallial arteries. 



4. Interior of dorsal valve, showing the labial appendages. ' Challenger ' Expedition. West 

 of Kei-guelen Island. (Zoological Department, British Museum.) 



Figs. 5-7. Liothyris uva, Broderip, sp. 5-5 b. Type from Gulf of Tehuantapec (Zoological Department, 

 British Museum). 6-6 6. A smaller specimen, from the same locality (Davidson Collection, 

 Geol. Dept., British Museum). 7. Interior of dorsal valve, to show the loop. 



Figs. 8-14. Liothyris WyviUii, Davidson, at various stages of growth. 12. Interior of dorsal valve, to 

 show the loop. Dredged by ' Challenger ' Expedition at different places named in the description 

 of species. (British Museum and Davidson Collection.) 



Figs. 15, 16. Liothyris subquadrata, Jeffreys, sp. 15, 15 a, 15 6. Exterior of the shell after the type, in 

 Davidson Collection, Geol. Dept., British Museum; 15c. Shell-sculpture enlarged. FromSetubal, 

 coast of Portugal, near the mouth of the Tagus. 16. Interior of dorsal valve of the same species. 



Figs. 17, 18. Liothyris sphenoidea, Philippi, sp. : ' Travailleur ' Expedition; off Morocco. (Museum 

 d'Histoire Naturelle, Paris.) 18. Interior of dorsal valve, to show the loop. 



Figs. 19-22. Liothyris sphenoidea, Philippi { — cubensis, Pourtales). 19, 19 a, 19 6, 21, 22. Florida reefs, 

 dredged by M. de Pourtales (Davidson Collection, Geol. Dept., British Museum). 20. Ascension 

 Island; dredged by 'Challenger' Expedition (Zoological Departmeut, British Museum). 



Figs. 23-23 6. Terebratula (or Terebratulina ?) Dalli, Davidson. 23. Type, natural size : dredged by 

 'Challenger' Expedition, lat. 34° 37' N., long. 140° 32' E. 23 a, 23 6. Enlarged. The only 

 known specimen is in the Zoological Department, British Museum. 



Plate III. 



Figs. 1-3 fl. Terebratulina WyviUii, Davidson. 1, 1 a, 1 6. Exterior of the type, dredged by 'Challenger' 

 Expedition, N.W. of St. Thomas, West Indies, in 390 fathoms. 2. Interior of dorsal valve from 

 same species (Zool. Dept., British Museum). 3. Smaller specimen dredged by the ' Travailleur ' 

 Expedition, from the western coast of Africa (Museum d'Histoire Naturelle, Paris). 3 a. Shell- 

 sculpture enlarged. 



Figs. 4-5 a. Terebratulina Crossii, Davidson. 4,4 a. Type from Japanese water (Coll. of M. H. Crosse). 



5, 5a. A smaller specimen, same habitat (Davidson Collection, Geol. Dept., British Museum). 

 Fig. 6. Tei-ebratulina Crossii, Davidson. A large light salmon-coloured specimen obtained from Sagami 



Bay, Japan, by Dr. L. Doderlein, and from his Collection. 

 Figs. 7-11 a. Terebratulina japonica, G. B. Sowerby, sp. A series of specimens from Japanese waters 



(British Museum and Davidson Collection) . 11,11a, represent the Terebratula angusta, Adams 



and Reeves, which is only a young Terebratulina japonica. 

 Figs. 12, 12 a. Terebratulina caput-serpentis, Linne, sp., from Sagami Bay, Japan, found associated with 



T. japonica. In the Collection of Dr. DiJderlein. 



