QQ SVEN LOVEN, ON THE ECHINOIDEA DESCRIBED BY LINN^US. 



2. EcHiNus Globulus L. 



EcHiNUS hemisph^erico-subglobosus, ambulacris denis^ 

 areis lateribus miiricatis: medio porosis. 



S. N. ed. 10 et 12. 



Hahitat in Oceano Indico. 



Testa hemisphferico-giobosa, nitidissima. 



Ambulacra 10, serie poronim qnadruplici, subtus fere 



repanda. 

 Areol^ major es ad latera et basin rufe, miiricatce 



punctis albis prominulis. 



Disens longitudinaliter glaber, glancus, lineola 



flexuosa longitudinaliter inscnlpta, ad cnjus angnlos 



pnncta semipertnsa. 

 Areolj^ minores duplo angnstiores, cfeterum eaedem. 



The Lectures of 1752 have »lateribus», witli tliis ex- 

 planatiou: »has spines on the sides of the elevations», that is: 

 of the interradia. 



Agassiz recognised the species thus described. It is the 

 only one in its group having the pedicellar pores disposed 

 in such a manner that every zone consists of two longitudinal 

 rows, the outer one of which has its pores farther apart than 

 the inner one. If, after the manner of Linn^us, each geminal 

 pore is counted for two, there come forth transverse rows of 

 two pores alternating with rows of four pores. This appears 

 to be the meaning of the words: »serie pororum quadruplici», 

 always assuming the text here to be genuine. 



A specimen in the collection, marked »Mus. Gust. Ad.», 

 indubitably is the original type of the description. It is 



