REPORT ON THE ECHINOIDEA. 173 



Maretia planulata (PI. XXXVIII. fig. 23 ; PI. XL. figs. 54, 55 ; PI. XLI. figs. 



17 20). 



Spafangus ovaius, Leske, 1778 Kl. Add. (?iun Lamk. nee KL) 

 Maretia plamdata, Gray, 1855, Cat. Rec. Ech., p. 48. 



Admiralty Islands. 16 to 25 fathoms. March 7, 1875. 



Port Jackson. 6 to 15 fathoms and 2 to 10 fathoms. April 18, 1874. 



Levuka Reef. July, 1874. 



Eupatagus {Sjxitangus). 

 Ewpatagus, Agass., 1847, C. R., Ann. Sc. Nat., vol. viii. 



Eupatagus valenciennesii (PL XXXVII. figs. 5, 6 ; PI. XXXIX. fig. 17 ; PI. XL. 

 figs. 11, 12). 



Eupatagus Valenciennesii, Agass., 1847, C. R., Ann. Sc. Nat., vol. viii. p. 9. 



I have given on Plate XXXVII. figures of this species of Eupatagus covered with 

 spines. From the size of the broken primary spines of the interambulacral area in the 

 petaloid region of the ambulacra, some of them must have attained a considerable size. 

 These primary spines are curved, and may have been nearly half the longitudinal diameter 

 of the test in length. The spines of the actinal plastron and of the interambulacral areas 

 of the actinal side near the ambitus, are similar to those of the abactinal region, only 

 considerably smaller. The rest of the test, with the exception of the tuft of longer spines 

 near the anal system, is covered by short slender spines of uniform length somewhat 

 distant, increasing in size near the ambitus on the actinal surface. The colour of the 

 test in alcohol is brownish-pink, darkest within the peripetalous fasciole, the primary 

 spines are of a reddish -yellow tint, the smaller ones darker brown, gradually passing 

 towards the edge of the test into the prevailing colour of the test, which is brownish-yellow 

 and dirty yellowish on the actinal side ; on the abactinal surface the margin of the coronal 

 plates forms at first a light coloured frame round the darker central part. This eventually 

 l^ecomes quite light coloured, and on the actinal side the test and spines are nearly of the 

 same tint. 



Ofi' Port Jackson ; 30 to 35 fathoms. 



Station 188. September 10, 1874. Lat. 9" 59' S., long. 139° 42' E. ; 28 fathoms ; 

 mud. 



Arafura Sea. 



Echinocardium. 



Echinocanlium, Gray, 1825, Ann. Phil. (pars.). 



The difficulty of properly limiting the genera of Spatangoids is well shown in the 

 diff'erent attempts which have been made to limit Echinocardium, Breynia, Lovenia, and 



