134 



PROP. T. B. JONES 0~N NTTMMTJLITES ELEGANS 



pi. 538. ."No. 44007 (5) has the 7th and 8th figures (part of 

 " fig. 2") on pi. 538. These are said to be from Emsworth, near 

 Chichester, and consist of a siliceous shell-rock not otherwise known 

 in England. These specimens, Nos. 44007 (3, 4, 5), were those 

 which I saw with Mr. Sowerby in 1852, and understood to be 

 N. elegants. Recognizing them as N. planulatus, and probably foreign, 

 and, not seeing the others, I did not adopt the name elegans, but 

 designated the Barton specimens of bed " no. 29," in which I was 

 then interested, by a new name. 



It will be well to mention that in plate 538 of the ' Mint. Conch.' 

 the NummuUtes Icevigatus is illustrated by " fig. 1 " at the top ; 

 JV. variolarius by "fig. 3," in the middle; and JS T . elegans [and 

 N. planulatus] by " fig. 2," at the bottom. Counting the figures 

 individually, for convenience of detailed reference (as De la Harpe 

 does), " fig. 1 " comprises nos. 1-5, " fig. 2 " nos. 6-11, and " fig. 3 " 

 nos. 12-17, countiDg in the order of figs. 1, 2, and 3; if in the order 

 of actual position on the plate, the sequence would be different. Of 

 "fig. 2," at the bottom, no. 10 is the real " elegans" *, the others 

 being N. planulatus at different stages of growth t, and from 3 to 

 10 millim. in diameter. 



Elucidative Scheme of Plate 538 ' Mineral Concliology? 



v N. Icevigatus 

 r (nat. size). 



J 



Fig. 1. 

 1. 



2. 3. 



5. 



Fig. 3. 



12. 13. 14. 15. 16. j j\r variolarius 



I (nat. size and 



17. magnified). 



Fig. 2. 



6. 7. 8. 9. 10. 11. 



Adult. Young. Vertical Horizontal Adult. 



section. section. 



N. planulatus N. elegans N. planulatus 



(nat. size). (enlarged). (nat. size). 



* This horizontal section, differing from any such on the " Emsworth " stone (on 

 which, indeed, there are only one or two exposed), is like those of the specimens 

 from bed " jNo. 29 ; " and if magnified twice, as is probable, would be about 

 2^ mm. in diameter. 



. t Such, for instance, as may be observed among a set of specimens of this 

 species from Forets, near Brussels, and elsewhere. 



