80 SVEN LOVEN, ON THE ECHINOIDEA DESCRIBED BY LINN^EUS. 



5. ECHINUS LiXULA L. 

 Tab. 3. 



EcHiNUS hemisplisericus, ambulacris denis, paribus 

 approximatis, areis traiisversim pnnctatis, nuiricatis. 



S. N. ed. 10 et 12. 



Hahitat in Oceano Indico. 



Testa hemispliferica, basi planiuscula. 



Ambulacra 5 parium: paribiis approximatis; areola 



intermedia lineari acnta. 

 Are^ 5 majores pimctis eminentibus : seriebus trans- 



versis saepe 6 ad 7 utrinque, ubi plnrimEe; superi- 



ores sensirn pauciores. 

 Are^ 5 angustiores diiplici serie puDctorum eminen- 



tium. 



In tlie diagnosis thc Lectures, 1752, and S. N. ed. 10, 1758, 

 ed. 12, 1767, liavc »pnnctatis», the M. L. U., 1764: »punctis». 



Tradition lias from time to time pointed to some species 

 of Arbacia Gray as designed by tbis Linnean name. Fahl- 

 BERG in his Contributions to the Natural History of S:t Barthe- 

 lemy^), of 1786, enuraerates among its marine prodnctions: 

 »E. Lixnla», meaning no doubt the Arbacia punctnlata Lamck., 

 of which there are specimens still extant in our State Museum 

 probably sent home by him in 1791. In 1825 Blainyille'-) 

 expressed his conviction that the »E. lixula L. (Mus. Lud. Ulr. 

 707)» might coincide Avith his E. sequituberculatus, and Des- 



') Kongl. Vetenskaps- Akademiens Handlingar, 1786, p. 254. 

 ^) Diet. d. Se. Naturelles, XXXVII, p. 77. 



