BIHANG TILL K. SV. VET.-AKAU. HANDL. BAND 13. AFD. lY. N:0 5. lOo 



and the Echinocardium, 21, are said to be from the ;>Insula 

 D. Thomtev, off Gaboou, whilc tlic Brissns, 19, is without any 

 habitat, and the Ecliinus, 20, the Metalia, 22, and the Echino- 

 lampas, 23, are severally stated to have come from the East 

 Indies. Now, as this is inconsistent with the words premised, 

 and as all the nvimbers of the text respectively answer to 

 those of the plate, it must be that the line quoted above has 

 been misplaced. The only way of giving it a reasonable 

 meanino- is transferrino- it to between the numbers 7 and 8. 

 Then it comes to stånd at the head of eight numbers, 8 to 

 15, all without auy localities, and consequently all representing 

 inhabitants of the Bight of Guinea, among them the four 

 Arbaciae. 



Already in the middle of the seventeenth century the 

 Dutch had settlements on the GJold Coast and for a time pos- 

 sessed the island of Säo Thomé. No doubt industrious collec- 

 tors were at work there as everywhere, and dealers were busy 

 distributino- amono- amateurs the natural curiosities of Western 

 Africa, the Rotulse were widely spread, and the »Guineesche 

 Toot>^, the Conus genuanus L., is enumerated by Schynyoet 

 and Valentyn among rarities. 



Professor Richard Geeeff of Marburg, whose good fortune 

 it has been to visit those regions so rarely seen by naturalists ^), 

 had the kindness to send me some species of Echinoids which 

 he had collected at Säo »José, and others from Liberia. Among 

 them were specimens of the A. Lixula L., Tab. 3, jig. 7, 8. 

 The specimen most closely agreeing with the Linnean types, 

 fitj. 7, is not fullgrown, having a diameter of only 25 ram. 

 and a hight of 12,5 mm. or 0,5. It has thirteen plates; the second 

 series of interradial tubercles attains the second and third platc 

 from the calyx, the third series the fourth and sixth, the 

 fourth the eighth. It shows in a striking manner the charac- 

 teristics of the Linnean A. I^ixula, the small tubercles, the am- 

 bulacral areola with its well-developed granules, and its epi- 

 stroma is even more luxuriant than in any of the typical 

 specimens, Tal. 7, fig. 2. In these it is, oti the calycine sy- 

 stem, tinely granulated and slightly tumid, in the specimen c 

 alone it presents here and there a coalescence into coarser gra- 

 nules. In the oue Liberian specimen these concretions form, 



') Greeff, Die lusel Säo Thomé. Peternianns Mittheilungen, XXX, 

 I, p. 121. 



