78 SVEN LOVEN, ON THE ECHINOIUEA DESCRIBED BY LINN.EUS. 



terranean, and 10. E. aciitus, liabitat theu unknown. For the 

 E. melo he refers to Gualtieri, t. 107, fig. E, 1742, but it is 

 more accurately fignred by Ginanni^), as yRiccio marino detto 

 da' nostri Marinari Pescatori jNIelo marino;;. Lamarck says 

 it has been confouuded with tbe E. sardicus wliich he, conse- 

 quently, regards as the principal form and as a species of long 

 standing. The E. aciitus is distingnished from both. The tri- 

 vial name: sardicns, that is: from the sea of Sardinia, comes 

 from the »Echinometra maxima Pelagica Sardica> of Aldro- 

 VANDI-), the ligure of which represents something between 

 the E. melo and the E. acutus. Accordingly Desmodlins'') 

 felt inclined to give the name of »sardica» to a species of the 

 Mediterrancan, the E. psendo-melo Bly., and in 1841 Agassiz*) 

 declared the E. sardicus Lamck, »a synonym of the E. pseudomelo 

 Bly.», to come very near to the E. melo, >>from which it differs 

 in the smallness of its pores rather than in its general form». 

 But some years afterwards-') he placed the E. sardicus Lamck 

 at the head of his genus Tripneustes, attaching, as it seems, 

 a greater weight to tradition than to the description Lamarck 

 himself has given. Lamarck quotes Klein, Leske and Scilla. 

 Klein ^) seems to have adopted the species had in view by 

 Aldrovandi as the >Cidaris assulata Aldroyandi», but substi- 

 tuted a new ligure not nearly as good as that given by its 

 author. Leske ^) attached to that Kleinian figure the name Ci- 

 daris sardica, but accompanied it witli a description of his 

 own, taken from specimens in the collections of LiNCK and 

 Trier, manifestly of still another and different species, as be- 

 comes obvious from its beinof said to have ten to twelve rows 

 of tubercles in the interradia, four or six in the ambulacra, 

 and the pores arranged into arcs of five pairs. The species 

 thus described cannot have been a Tripneustes; it probably 

 rests on the Spaerechinus granularis Lamck confounded with 

 the Strongylocentrus lividus Lamck, and until it be properly 

 found out, the name sardicus Leske must be in suspenso. 

 Consequently the reference to Leske is to be withdrawn, and 



') Opere postume, IL p. 38, t. 28 et 29, fig. 173; 1755. 



*) De animalibus exsangnibus. p. 411: 1642. 



3) Etudes, p. 285; 1837. 



*) Monogr. d'Echiuod., IV, Preface, p. III. 



*) C. K. p. 59: 1847. 



«) Disp., p. 21, t. IX, fig. A, B. 



') Addit. p. 146. 



