150 SVEN LOVEN, ON THE ECH1N0I1>EA 1>ESCRIBED BY LINN/EUS. 



9. F^CHINUS MAMILLATUS L. 



EcHiNus hemisphffirico-ovatiis, ambulacris denis fie- 

 xiiosis, areis miiricatis verriicosis: angiistioribus 

 abbreviatis. 



Prjelectioues 1752. 



GuaJf. test. t. 108. f. C (B). 

 Argcnv. conch. t. J^8, f. E. 



M. L. U. 1764, add. 



Bnmpli. mus. 82, t. 13. f. 1. Echinometra dig"itata 1. 

 obloni;'a. 



S. N. ed. 10, 1758 add. 



Klein, Echinod. 19 t. 6 (ed. grerm.) Cidaris mamillata 

 Pauli. 



S. N. ed. 12 subst. 

 Klein, EcMnocl. 10 (ed. german.), t. ,5, /". A (ed. gäll.) 



S. N. ed. 10 et 12. 

 Habit at .... 



The descriptioD in tlie INI. L. U. is utterly at variance 

 with thc diagnosis and evideiith' not intended for this spe- 

 cies. It is consequently omitted here and will be discussed 

 under the next. 



In the original set of Echinoids in the Queens Cabinet 

 first described bv Linn.eus this was the last amonor the Re- 

 gulares, and so it was in the Lectures of the autumn of 

 1752. The diagnosis then ended with the word: »verrucosis». 



C? 



The following two words in the S. N. ed. 10: »anaustioribus 

 abbreviatis» were added to distino-uish it from the No 10, 

 which hud been acqiiired in the mean time. Thej refer to 

 the well-known pecidiarity of its ambulacral tubercles which 

 increase in size from the peristome to thc ambitus and above it, but 

 then suddcnly become very small. It was named E. mamillatus 

 in the S. N. ed. 10, and has been ever since universallv 



