42(3 Proceedings of the Royal Physical Society. 



23. Spatangus Raschi, Loven. 



1868. S2Xitan(jus incridionalis, Norman, Last Kep. Shetland Dredging, 



p. 315. 



1869. ,, liaschi, Loven, Ann. and Mag. Nat. Hist., (4) iv., 



p. 220. 



1870. ,, ,, Loven, Ofvers. k. Vet. Akad. Forh. xxvi. for 



1869, p. 733. 

 1872. ,, ,, Agassiz, Rev. Echin., pp. 159, 567, pi. xxv., 



fig. 35; pi. xxvi., fig. 23. 

 1889. ,, „ Bell, Ann. and Mag. Nat. Hist., (6) iv., pp. 



442-444. 



Diagnosis. 

 In this species the test is more elevated than in the last ; the 

 anus is subinferior, and the anal tract small ; subanal tract incon- 

 spicuous; petals narrower and less depressed than in S. purj^ureus; 

 spines short and slender, and their tubercles correspondingly less 

 conspicuous than in the form just mentioned. On the inferior 

 surface the lateral spineless areas are wider than the central 

 spiniferous one. 



Distribution. 



British Seas. — W. and N. of Shetland, "Porcupine" (1869) 

 (Thomson, 1). Shetland (Barrett; Brit. Mus.); 25-35 miles 

 N.N.W. of Burrafirth Lighthouse, 100-140 fms. (Norman, 3). 

 Off St Kilda, 100 fms. (Hoyle, 1). 40 miles off Yalentia, 

 *' Porcupine" (1869), 110 fms. (Thomson, 1; Coll. Norman). 

 Kerry (Brit. Mus.). 40 miles S.-W. of Ireland, 30-90 fms. ; off 

 Great Skelligs, 110-120 fms. (Haddon, 2). S.-W. Ireland, 

 100-180 fms. (Bell, 3). 



Other Localities. — Scandinavia, 200 fms. (Basch, yjc^e Agassiz, 

 2). Azores (Breslau Mus., Jide Agassiz, 2). Portugal (Brit. 

 Mus.). Off the Cape of Good Hope, " ChaUenger," St. 142, 150 

 fms. ; Agulhas Bank, 100 fms. (Agassiz, 3). 



13. Echinocardium, Gray. 



1825. Echinocardium, Gray, Ann, Phil., x., p. 430. 



Test cordate, thin ; ambulacral petals more or less triangular ; 

 anterior ambulacrum in a more or less distinct fossa, with small 

 pores ; anal system vertically truncate ; subanal depression ovato- 

 cordate; terminal, with branches ascending round the anal system; 

 dorsal impression within the ambulacral petals ; inferior spines 

 spatulate ; the rest slender and silky. 



