A Revised Lid of British Ecbinoidea. 423 



1847. Brisso2ms lyrifera, Agassiz k Desor, Catal. raisonne, Ann. Sci. 



Nat, (3) viii., p. 15, pi. xvi., fig. 12. 



1872. ,, ,, Agassiz, Rev. Echin., pp. 95, 354, 594, pi. 



xix., figs. 1-9; pi. xxi., figs. 1, 2; pi. 

 xxxviii, , figs. 36-38. 



1874. ,, ,, Loven, fitudcs, \)\. i., fig. 1 (living animal), 



figs. 10, 17 (sphcridia) ; \A. ii., figs. 27-31 

 (nervous system); pi. iii. , fig. 32 ([)eri- 

 stome) ; pi. xii., figs. 100, 101 (apex) ; 

 pi. xxxvii. (test). 



1883. ,, ,, Loven, Pourtalesia, pi. viii., fig. 66 (mon- 



strous pedicel); pi. ix., figs. 80-90(pedicel); 

 pi. xii., fig. 143 (peripodiuni) ; pi. xix., 

 figs. 223-231 (calyx). 



1883. ,, ,, Agassiz, " Blake" Echini, Mem. Mus. Comp. 



Zool., x., p. 69, pi. xxvi., figs. 7-18. 



1884. ,, ,, Cams, Prodr. faun. Medit., i., p. 103. 



Diagnosis. 



Test dejH'essed, truncate behind ; dorsal impression lyre-shaped 

 and most distinct behind ; ambulacral petals depressed ; anal 

 system circular ; subanal system elliptic, transverse, concave 

 towards the anal system ; inferior spiniferous area lanceolate. 



Distribution. 



British Seas. — Mud, 10-15 fms., in the estuary of the Clyde 

 (Forbes, 1). Fseroe Channel, cold area, "Porcupine" (1869), Sts. 

 62-66, 125-200 fms. (Thomson, 1). Shetland, 70-90 fms. (Forbes, 

 2). Unst Haaf, Whalsey Skerries Haaf, St Magnus Bay (Norman, 

 3). OfFSamburgh Head, 75 fms. (Pearcey). Hebrides (Norman, 2). 

 N.-W. of Scotland, 30 fms. (Forbes, 2). Aberdeenshire and 

 Moray Firth (M'Gregor and Dawson, 1 and 2). Off Montrose, 

 42 fms. (Bell, 1). Hebrides, 100 fms. (Forbes, 2). Upper 

 Loch Torridon (Hoyle, 1). Loch Duich, 60 fms.; Loch Hourn, 

 70 fms. (Brit. Mus.). Clyde province, 6-100 fms. (Forbes, 2). 

 Brodick Basin, 50-90 fms. ; Kilbrennan Basin, 22-80 fms. ; Inch- 

 marnock Basin, 37-104 fms. ; Cumbrae Basin, 50 fms, ; Dunoon 

 Basin, 30-42 fms. (Hoyle, 2). Off Gourock and Largs (Grieve). 

 Lower Loch Fyne, 80 fms. (Brit. Mus.). Off Skate I., Loch 

 Fyne, 105 fms. (Henderson). Off Arran and Cumbrae, and 

 Kilbrennan Sound, 22 fms. (Brit. Mus. ; Henderson). Off 

 Sanda I. and Ailsa Craig (Brit. Mus.). Isle of Man (Gray). 

 Northumberland and Durham (Hodge; Coll. Norman). Off 



