496 



ECHINUS NORVEGICUS. 



In younger specimens the contrast between the two principal rows of the 

 secondaries is more marked, the space between the latter is greater ; a close 

 miliary granulation covers the high coronal jdates. 



Norway ; English Channel. 



Echinus norvegicus 



! Echinus norvegicus Dun. o. Kor., 1844, Skand. Ech. 

 (See Part II. p. 296.) 



PI. VI". f. 4- 



Norway ; Mediterranean ; Straits of Florida. 



TOXOPNEUSTES. 



Toxopneustes AOABS., 1841, Int. Monog. Scut.* (uon Ac, 1841, An. Ech., nee 1846, C. R.) 

 (See l'art II. p. 297.) 



Toxopneustes maculatus 



! Echinus maculatus LAMK., 1816, An. s. Vert. 



! Toxopru ustes maculatus A. Ac;., 1872, Rev. Ech., Ft. I. p. 167. 



There are but few specimens of this species in the different Museums, 

 nearly all of the same size, and all unfortunately devoid of spines and 

 of actinal membrane. The very peculiar pattern of coloration of the de- 

 nuded test, the large, irregular, star-shaped violet blotch round the abactinal 

 pole, extending some way down the test, and the broad hand of the same 

 color round the ambitus, give the test a very remarkable aspect ; but in spite 

 of this, and of its more regularly arched outline, the general measurements 

 agree very well with T. pileolus. As long as we know nothing more definite 

 regarding the anal and actinal system, it is as well to point out here the 

 (inferences just mentioned, and add that the arrangement of the tubercles 

 is somewhat different ; they are farther apart than in any specimens of 

 T. pileolus I have had occasion to examine. The outline from above is 

 very regular, and the most prominent feature is the comparatively shorter 



* Not as on p. 297, Toxopneustes Ac ass., 1836, Prod. 



