BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 13. AFD. IV. X:0 5. 1<)9 



to the A. (lustralis Teoschel, while Alexander Agassiz com- 

 preheBcled under it all the species, spinigeroiis all över, that 

 were knowu to him. It has not the right of primogenitnre 

 and has been sadly misapplied. 



The other is Arbacia loculata Bly. Klein had given, at 

 D on his plate XI, the figure of his i-Cidaris assulata spec. V 

 pustnlosa 7»), distingiiished from a) fig. A, B: >pnstulis den- 

 sis» . . . »ore magno», and from (i) fig. C: »pustulis rarioribus, 

 ore sinuoso», by the words: »pustulis rarissimis, ano et ore 

 parvis». Leske^) says the figure D completely agrees with 

 the original specimen, and keeps it apart from his »Cidaris 

 pustuiosa» represented by the figures A, B, and C. Lamarck-), 

 quotes it for two different species. Blainaille^). after having 

 duly referred these, came to the conclusion that the figure I^ 

 represented some other distinet species unseen and unknown 

 to him, Avhich he descrlbed from that figure alone, naming it 

 E. loculatiis. This appellation was adopted by Desmoulin.s*) 

 for a species in his collection, received through Rang from 

 the elder dOrbigny, and said to inhabit the Atlantic coast of 

 France and the Channel, and by Aga88iz and Desor^), who 

 transcribed its habitat and noted its afiinity to the E. stellatus 

 of Blainville. In 18ii9 Desmoulins*^) still held the same 

 opinion, until shortly afterwards in the same year Paul Fischer^) 

 made known the fact that Cotteau also had received from 

 the same d'Orbigny a specimen of the same species, which 

 had been taken from the bottom of a vcssel careeued at La 

 Rochelle, and beset with shells of Spondylus and Chama. 

 Thus Desmoulin^' E. loculata was found out to be an exotic, 

 perhaps an A. Lixula from Liberia^). Troschel once thought 

 to have rccognised it in a species from western Africa, but 

 soon gavc it up and called that species »africana». From all 

 this it follows that tlie name loculata», invented for a hv- 

 pothetical species nowhere to be found and nevcr to be identi- 

 fied, is best consigned to oblivion. 



') Addit. p. 152. 



2) An. s. Vert. III, p. 47. 4i). 



3) Diet. se. nat. XXXVIT, p. 7r>: 1825. 

 *) Etudes. p. 36, 306: 1835. 1837. 



^) C. R. p. 4!t, 1847. 



") Actes C^oc. Lin. Bordeaux. XXYII, p. 162. 



') Ib. p. 271. 



*•) Al. Ag. Rev. 403. 



