60 SVEN LOVÉX, OX THE FXllINOIDEA UESCRIBED BY LINXyEUS. 



The ->Are.e», »are.k majores», »areol.e ö majores>, y>la- 

 ttores-^, are tlie five intcrradia. Tliey are ;>biiidai», i. e. consist 

 each of two rows of plates. Tlie »linea lateralis flexiiosa», 

 linea lonoitudinalis» is their median sutxire. 



The »Puneta seraipertusa» are the pits or lacuna^ at the 

 angles of this sutiire in the TenmopleuridaB. 



The »Disciis> is the middle part of an area major or minor, 

 as distinct from tlie marginal parts *). 



Tlie »Vernica?» are the primary tubercles wlien large as 

 in Cidaris, Diaderaa, Heterocentms, the ares of which are 

 called »verrucosfe». Once only, in Echinus esculentus, primary 

 tubercles of minor sizc are called verrueae, but with the quali- 

 hcation: sobsoletfe». Once, in the description of the E. lu- 

 cunter, they are called tubercula. The scrobicula is named 

 basis. 



The »Puncta>, »puneta callosa», veminentia», >promineutia», 

 »prominula», »elevata», are tubercles of middle size, secundary, 

 tertiary tubercles, granula; tlieir presence in the areae is 

 indicated by »muricatse», »submaricataa». 



It uow follows to consider severally the species of Echi- 

 nus described by Linn.eu.s. Of each of tliem I shall give: 

 the orio-inal dia^nosis, corrected and emended; the references 

 to other works and tlie tifjures these contain, which Linn.eus 

 pubjoined from time to time, in the Fauna Suecica of 1746 

 and 1761, in the Lectures of 1752, the Systema Naturce ed. 10 

 of 17ö(S, tlie Museum Ludovica^ Ulricce of 1764, and the Sy- 

 stema Natura? ed. 12 of 17(57; after tliis Avill come the habitat, 

 and, lastly, the description, from the M. L. U. Having thus 

 placed togetlier, in one connexion, all that Lin.n.eus has said 

 in diiferont works ou tlie species in question, I shall duly 

 account for the alterations introduced, and assign the reasons 

 1 have had in making them, then comment on the whole of 

 the descriptive part and on the various references, and point 

 out the modern species which coincides witli that of Linn.eus, 

 and wliicli is to take its name. 



') Phil. Hot. p. 44, e. Margo est extrema ora folil ad latera, intacto 

 disco folii. 



