BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 13. AFD. IV. N:0 5. 145 



1816. Ehabdocidaris baculosa Lamck., 1883. De Lokiol, Echi- 



nod. Maurice, p. 4, 

 pl. 2, f. 2. 

 1816. Cidaiites pistillaris Lamck., An. s. Vert., III, p. 51. 



» 1824. Ene. Métli., IV, p. 

 194, pl. 137. 



For other rcferences see Al. Agassiz' Revision. The Ci- 

 daris lima Val., Ag. Des., seems doubtful on account of the 

 primary verrucje being said to be very large, and reminding 

 of those of C. imperialis. 



The works of preceding authors contained no figure agree- 

 ing with the type specimen of the Echiniis Cidaris, and 

 LiNN.ET^s quoted only those uearest at hand that had a general 

 resemblance to it, and afterwards, as years went on and 

 when for a long time he had not seen the original, appended 

 such others as came imder his eyes and seemed to associate 

 with it. The figure given by d'Argenville, of a species from 

 the Red Sea, admits of no determination; Gualtieri gives the 

 Cidaris papillata Leske; that of Rumphius, t. 13 fig. 3 pos- 

 siblv mav have been mcaut for the E. Cidaris L., and the 

 spine E to the left has eome from a C. baculosa Lamck. The 

 figure given by Bonanm probably is intended to represent 

 the C. papillata, Klein's t. 7 fig. A, by Louis Agassiz and 

 Desor transferred to the C. tribuloides, vaguely reminds us 

 of that species as of the C. parvispinis Tenyson-Woods, while 

 B, C, are rude figures of the C. papillata. Those of Seba, t. 

 13 fig. 12, 13, are indeterminable, and those of Balter, ne ar ly 

 so, are already cited under the E. esculentus and rcappear 

 here by mistake. The whole of these old figures, which in 

 no way help to define the Linnean species or anv other, may 

 safely be cousigned to oblivion. 



Amoug other species the Phyllacanthus gigantea Al. Ag. 

 alone seems in some manner to come nenr to the Linnean 

 type. A large specimen of it is said to possess ten primary 

 interradial verrucaj, »the oreatest number thus far noticed 

 in any species of Phyllacanthus and Cidaris». The median 

 interradial space covered with miliaries is more thau half the 

 total breadth of the interradium. The median arabulacral »zone» 

 is crowdcd with miliaries formine; eioht or ten irreo-ular ver- 

 tical rows. The sexual pores are situated near the centre of 

 the pieces. The specimen catalogued in the United States 



10 



