A Revised List of British Ecliinoidca. 413 



in deep water off the Faeroes" (Thompson, 2). Perhaps this is 

 var. tenuis])i7ia, Norman. 

 Abnormal example (Bate). 



11. Echinus acutus, Lamarck. 



1816. Uchinus aciUus, Lamarck, Hist, aiiini. s. vert., iii., p. 45, 

 1828. ,, miliaris, Fleming, Ijrit. Anim., p. 478 {nee Miiller). 

 1841. ,, Flemingii, Forbes, Brit. Starf., p. 164, cut. 

 1844. ,, ,, Diiben & Koren, Skand. Ecliin., p. 266, 



pi. ix., figs. 31, 32. 

 1872. ,, acuUis, A. Agassiz, Kev. Echin., pp. 121, 489. 

 1884. ,, ,, Canis, Prodr. faun. Medit., p. 100. 



Diagnosis. 

 Test subconical ; principal tubercle in each plate very con- 

 spicuous and surrounded by secondary ones both in ambnlacral 

 and interambulacral plates ; secondary tubercles more numerous 

 in the oral than the aboral surface ; primary spines much fewer 

 than secondary, and nearly three times as long ; colour yellowish, 

 often with reddish bands ; spines white, with a dull green band, 

 changing into red at the base. 



Distribution. 



British Seas. — Shetland, Youghal, S.-W. Ireland (Forbes, 1). 

 Fseroe Channel, 400 fms. ("Porcupine" Exp., /c/e Agassiz, 2). 

 North and West of Shetland (Thomson, 1). Shetland, Outer 

 Haaf (Norman, l^). Off N. Rona, "Knight Errant," St. 3, 53 

 fms. (Agassiz, 4). Hebrides (Norman^). St Andrews (M'Intosh). 

 Tynemouth (Brit. Mus.). S. of Ireland, 100 fms. ("Porcupine" 

 Exp., fide Agassiz, 2). S.-W. Ireland, 55-500 fms. (Bell, 3). 

 S. of Ireland (Thompson, 2). S.-W. of Ireland, 70 fms. (Bell, 4). 

 Mount's Bay (Tregelles). Cornwall and Devon (Bate). Fal- 

 mouth (Cocks ; Brit. Mus.). Torquay (Parfitt). Plymouth 

 (Heape ; Coll. Norman^). Weymouth (Brit. ^Mus.). Budleigh- 

 Salterton (Coll. Norman). 



Other Localities. — Norway (Sars ; Brit. Mus. ; Coll. Norman ; 

 Copenhagen Mus. ; Manchester Mus. ; Grieg). Holland (Mait- 

 land). France (Fischer). Cape Sagres ("Porcupine" Exp., 

 fide Agassiz, 2). Mediterranean (Ludwig ; Carus ; Brit. Mus.). 

 W. Indies (Agassiz, 1). S. Pacific, 520 fms. (Brit. Mus.). Off 

 Halifax, "Challenger," St. 46, 1350 fms. Off Kermadec Island, 

 '^Challenger," St. 170, 630 fms. Off Ascension, "Challenger," 

 St. 343, 425 fms. (Agassiz, 3). 



1 Specimen, ISj ins. in equatorial, 131 ins. in polar circumference. 



