f. F. JEFFREY BELL. 



Bjicc'imens were taken at ('(Uilniaii Tslaiul. 100 I'ms. ; AViiiter Quarters, 100 fms. ; 

 East CHil of Barrier, 100 fms. 



This species is one that has lately l)ecn the subject of some dispute ; Prof. Agassiz,* 

 who originally described it, suggests that it be placed in a new sul)-genus Centrocidarifi, 

 while Dr. Mortensen f finds it to consist of .several .species, biil lie docs not appear to 

 be sure of the exact number.J 



ECHINIDAE. 

 ECHINU.S MARGARITACEUS. 



Echinus margaritaceus. Lunik. An. s. X . iii. (isii;), p. 47; Bull, ('oil. '.SontlKTU Cross' (I'.iO^), p. 219 



ihiqne citata ; Mortoiisen, Iii<jolf Echiiioid. (l'.)03), p. 101. 

 Echinm (Umlema, Studer, MB. Aka.l. Berlin (isTf)), p. 4r)6 ; Al. At?. Ch;ill. Rep. Echin. (1.^81), p. 117. 

 Echinus horiidus, Al. kg. op. rit. p. 117 ; Mortensen, op. rit. p. 102. 

 Sterechinus aniardimts, Koehler, Euhiii. Voy. 'Belgica' (1901), p. 8. 



This appears to be a circumpolar species, as I remarked when I reported on the 

 collections of the ' Southern Cross.' It was taken by the ' Discovery,' not only at 

 several dates in Winter Quarters, l)ut at the East end of the Barrier Eeef, 100 fms. ; 

 at (."ape Wadsworth, 8-10 fms. ; oft' Coulman Island, 100 fms. ; and South of 

 Antarctic Circle, 254 fms. 



Hemiaster cavernosus. 



iSpatanrjus {Tdpylus) cavernosus, Philippi, Arch. f. Nat. xi. (1815), p. 34."). 



Himiaster cavernosus, A. Ag. Hep. Ech. (1872), p. 132 ; Meissner, Ergebn. Hamburg Magalh. Sammelreise, 



V. (1900), p. 13 ibique citata; Bell, Coll. 'South. Cross' (1902), p. 219. 

 Abatus cavernosus, Loven, Bih. Svenska Vet. Akad. Hdlgr. xviii. 4, no. 1, p. 3. 



This species is not very well represented in this collection, and, curiously enough, 

 all the examples are males. 



If the late M. Bernard § was right in regarding Tripylus e.vcavatus as a synonym, 

 the name of the species ought to be excavatus, as that was the first of the three species 

 described by Philippi ; for myself I am inclined to abide by Prof Agassiz's view. 



Taken at Coulman Island, 100 fms' ; Winter Quarters, 20 fms. ; and East end of 

 Barrier Ivcef, 100 fms. 



IV. ASTEROIDEA. 



The collection of starfi.shes was rather large, and contained some very fine 

 specimens ; but, as will be shown later, there is very great difficulty in coming to 

 definite conclusions regarding them, and I have preferred to be vague rather than 

 dogmatic in treating of them. 



• Mem. Mus. Comp. Zool., xxxi. (1904), p. 32. t l"golf Echinoid. (1903), pp. 25-7. 



X As the final proof was passing through the press I received Trof. Lyman Clark's latest memoir on the 

 Cielaridac (Bull. Mus. C. Z. li. (1907), no. 7) ; he has instituted a new genus, Aiistrocidaris. 



§ Bull. Mus. Paris, i. (1895), p. 247. 



