BIIIANG TIJ.l, K. sv. VKT.-AKAI). HANDL. BAXI^ 13. AFD. IV. N:0 5. 133 



no liguie iu thc nianuscript seut from Amboina. It seemed 

 to him, liowever, that a small Echinoid presented by d'Acquet^), 

 iu vvhose coUection were uumerous objects given by Rumphius, 

 might come uear the sort had in view by tliis autlio]', and he 

 liad it ligured at A on the fourteenth plate and in the note 

 referred to it without reserve as the Echinus saxatiiis. But 

 as it was rather of an insignificant size, he added, as B, the 

 tignre of another spccimen, received also, and along with the 

 former from d'Acquet, of the sort known under the uum de 

 (juerre of the Turkisli Turban. He does not say that he re- 

 garded the two to be of one and the same sort, but the whole 

 of the note seems to me to imply that the iig. B was inserted 

 in order to make the fio-. A better imderstood. It mav lie 

 said to represent tolerably well a specimen of Diadema seto- 

 sum Gray of the same size. Now, this figure B, with its 

 copy in Petivee's Amboina, in the S. N. ed. 10 and ed. 12, 

 and in the M. L. U., is quotcd under the E. Diadema.- It is, 

 liowever, obvious tliat it cannot possibly have been drawn 

 from a specimen of that species. 



The depression of the »centrum» and thc swelling of the 

 surrounding parts are considerable, as in thc D. setosum, com- 

 ]»arcd with the E. Diadema; the costals are long, pointed and 

 nearly as in the D. setosum, not short and rounded as in the 

 p]. Diadema; the periproct, large and irregularly quadrangular, 

 is more like that of the former, and but little resembles the 

 rounded one in the latter; the ambulacra are by no means rcprc- 

 sented as beino- convex, raised, lanceolate, and exteudino- like 

 rays from the centre as in that species, their breadth, far from 

 increasing from the ambitus toward the »centrum», is repre- 

 sented as decreasing in that direction, as in D. setosum: the 

 verruca^ of the interradia are not conspicuously large as in 

 !■]. Diadema. It is true, the verrucae of thc doublc rows in 

 the ambidacra are not as large as in corresponding specimens 



') The introductory letter in wbich RUMPHIUS iutrnsts bis friend 

 d'Acquet with the editing of the »Rariteit-Kammer». begiai?: ".Soine yeavs 

 already we have corresponded, in particular about Shells, and I have 

 sent You most of their sorts, as mauy as I have been able to coUect.» 

 ... »I have ilhistrated the work with artistical delineations wbich I 

 hope will have Your approbation». The publisher, Halma, in bis dedi- 

 kation to d'Acquet says that many figures promised by the author had 

 never coirie to hand, and bad been replaccd by others from specimens in 

 various cabinets, particularly that of d'Acquet, all throngh the care of 

 SCHYNVOET. 



