160 ECniXOTDEA. 



Specimens about 70 mm. in diameter have the longest spines 

 between 9 and 10 mm. long ; but the spines arc little, if at all, shorter 

 in examples with a diameter of 50 mm. The spines vary more in 

 colour than in their other characters. 



Within the British area this species is only found in the Channel 

 Islands. 



Distribution. Coasts of France, Spain, and Portugal ; Mediter- 

 ranean. 0-37 fms. 



a. Herm. T. II. Powell, Esq. 



b. Herm. R. E. Spencer, E.sq. 



CLYPEASTRIDyE {see p. 31). 



ECHINOCYAMUS. 



Echinocyamus, Van Phelsum (1774), Brief aan C. Nozemnn, (1774) 

 p. 131, pis. 1 & 2 ; Ag. Mon. Scut. (1841) p. 125; A. Ag. Rev. Ech. 

 (1872) pp. Ill & 304; Dune. J. Linn. Soc. xxiii. (1889) p. 144. 



Spatagus, O. F. Mull. Prod. Zool. Dan. (1776) p. 2:36 (pars). 



Echinus, L., Gmelin, Syst. Nat. (1789) p. 3168 (pars). 



Fibularia, Lamk. An. s. Vert. (1816) p. 16 (pars). 



Test small, rather thick ; ambulacra short, wider than the inter- 

 ambulacra ; anus round, midway between mouth and hinder margin ; 

 tubercles small, set in depressions. 



1. Echinocyamus pusillus. (Plato XVI. figs. 8 & 9.) 



Spatagus pusillus, O. F. Mutt. Prod. Zool. Dan. (1776) p. 236 ; AbUg. 



Zool. Dan. iii. (1789) p. 18, pi. xci. figs. 5 & 6. 

 Echinocyamus angulosus, Leske, Add. p. 151 ; Aq. Mon. Scut. (1841) 



p. 130, pi. 27. figs. 14-18; Dub. § Kor. Vei.-Akad. lldlg. 1844 



(1846), p. 279 ; Ag. $■ Des. Ann. Sci. Nat. vii. (1847) p. 140; Sars, 



Norg. Ech, (1861) p. 95 ; Duj. $ Hup. Echin, (1802) p. 556. 

 Echinus pulviuulus, Perm. Brit, Zool. iv. (1812) p. 140. 

 Echinocyamus pusillus, Gray, Ann. Phil. xxvi. (1825) p. 428 ; Flem. 



Brit. An. (1828) p. 481 ; Ag. Mon. Scut. (1841) p. 128, pi. 27. 



figs. 1-8; Forbes, brit. Starf. (1841) p. 175; Phil. Arch.f Nat. 



1845, i. p. 356 [on its variation] ; Gray, Brit. Bad. (1848) p. 5; 



Gray, Cat. Bee. Ech. (1855) p. 28 ; Thompson, Nat, Hist. Irel. iv. 



(1856) p. 441 ; Sars, Nyt Mag. x. (1859) p. 60 ; Heller, Zooph. § 



Echin. Adriat. (1868) p. 66; Hodge, Tr. North. $ Durh. iv. (1872) 



p. 140; Al. Ag. Per. Ech. (1872) pp. Ill & 304; Mob. $ Biitsch. 



JB. Comm. Kiel, ii. & iii. (1876) p. 149; Lndtcig, MHth. zool. Stat. 



Neap. i. (1879) p. 559 ; Koehler, Ann. Mm. Marseille, i. 3. (1885) 



p. 127 ; Carus, Prod. Faun. Mediter. (1884> p. 101. 

 Fibularia tarentina, Lamk. An. s. Vert. iii. (1816) p. 17 ; Bisso, Eur. 



Merid, v. (1826) p. 283. 

 Clypeaster pulvinulus, Van den Ende, Nat. Verh. Hollandsche 



Maatsch. xvi. 2. (1828) p. 301. 

 Fibularia pusillus, Maitland, Faun. Belg. septent. (1851) p. 92. 



