I)K. T. DAVIDSON ON liECENT BRACHIOPODA. 177 



Plate XVI. 



Figs. 1-5. Tvrthratdia tipitzbt'rgeiisis, Davidson. 1, la, b, c. Type dredged by 'I'orrell ueiir Spitzbcrgcu 

 (Davidson Collection, Geol. Dcpt., British Museum). 2, 2 n. From ofT Satanomosaki, Japan 

 (Adams). 3, 3 a. From the Gulf of St. Lawrenec (J. F. Wliiteaves). 1, 5. Interior of dorsal 

 valve enlarged to show the loop. 



Figs. 6-9. Terebrutclla (ransversa, Sowerby, sp. ; figs, (j, 6 a, the ty])c alter Sowerhy. 7, 8, 9. Specimens 

 from off Vancouver Island 9. Interior of dorsal valve to show the loop. (Davidson Col- 

 lection, Geol. Dept., British Museum.) 



Figs. 10-12. Terehrdtella transversa, var. canriiia, Gould. From oil" Sitka and Vancouver Island. 12. 

 Interior of the dorsal valve to show the loop (Davidson {Collection, Geol. Dept., British Museum). 



F'igs. 13, 11«. Terebratella transversa, var. occidentulis, Dall. Coast of California. 13. Dall's figured 

 specimen. 14. From the Davidson Collection, Geol. Dept., British Museum. 



Fig. 15. Terebratella ? pulvinuta, Gould. Puget Sound, Oregon. After (iould ; type in Washington 

 Museum, D.C., U.S.A. 



Figs. 16-17/;. Terebratella? Frielii, Davidson. 16, 1(5 f/. Dredged by the 'Challenger' Expedition 

 off Halifax, in 1310 fathoms, \7-\7b. F'rom the Philippine Islands, opposite coast of the island 

 of Manilla, in 82 to 102 fathoms, ' Challenger ' Expedition. Specimens in the Zool. Dept., 

 British Museum. 



Figs. 18,18a. Magasella't labradorensis, Sowerby. After Sowerby's fig. Thcs. Conch, pi. Ixxi. tigs. 

 89, 90. Labrador. (Genus and species very uucertain.) 



Fig. 19. Terebratella ? rubiginosa, Dall, sp. From the type in the Smithsonian Cabinet, Wasliington, 

 D.C. Locality uucertain. 



Plate XVII. 



Figs. 1-5. Magasella flexuosa, P. King, sp. 1,2. Exterior of valves dredged by the 'Challenger' Expe- 

 dition in the Gulf of Patagonia. 3,4. Interior of dorsal valve, to show the loop. 5. Profile of 

 another specimen, to show the enormously developed mesial septum. 



Figs. 6-8 a. Magasella flexuosa? This is the type of the Terebratula rhombea, Philippi, from ^Magellan 

 Strait. In the Berlin Museum. I am indebted for these drawings to the liberality of Prof. 

 E. von jNIartens. 



F'igs. 9-11. Magasella crenulata, Sowerby, sp., from Santa Cruz, Canaries. 9, 9rt. A specimen dredged 

 by H.Cuming (in the Zool. Dept., British Museum). 10, 10a, 10 /v. After Sowerby's figs, in 

 Thes. Conch, pi. Ixxi. figs. 96-98. 11. From a fig. in Reeve's Conch. Icon. Monogr. of Tere- 

 bratula, pi. viii. fig. 32. 



I'igs. 12-13 a. Magasella patagomca, Gould, sp. 12. Gould's original type from United States Expedition 

 to Patagonia ; National Collection, Washington, D.C. 13, 13 a. Another specimen from the 

 same locality and collection given to me by Mr. Dall. 



Figs. 14-15. Magasella snffusa, L. Reeve, sp. 14—14 6. The type, given to me by Mr. Reeve in 

 1860. 15. Interior of the dorsal valve of the same specimen to show the loop and the largely 

 developed septum. 



Figs. 16-17 6. Magasella aleutica. 16. Type in the Washington Museum; from Unalaska. 17, 17a. 

 Another specimen given to me by Mr. Dall, from Popoff Strait, Shumagin Island. 17 b. 

 Enlarged. 



Figs. 18-19. Magasella Adamsi, Davidson. Type specimen; from off the Island of Kuro-puua, Japan. 

 19. Interior of the dorsal valve to show the small loop. 



Figs. 20-22. Magasella Gouldi, Dall. Hakodadi, Japan ; type in the National Collection, Washington, 

 D.C. 21, 22. Loop. 



Figs. 23-32. Magasella Cwningi, Davidson, sp. 23, 24. Two living specimens of a liglit pink colour ; 

 dredged by Mr. J. Brazier at South Reef, Port Jackson Heads, S. Australia. 25, 26, 27. From 



