352 
regular plates of various size. — The introvert is irregularly spotted 
with small yellowish-brown spots; such may also be observed on 
the tentacles. 
In the internal anatomy the only difference from the type appears 
to be the existence of 5 long and siender Polian vesicles, while 
Den dy found only two of them and Ludwig even only one. 
The differences in the calcareous deposits which, according to 
the above description, exist between this specimen and those de- 
scribed by the three authors quoted are rather conspicuous, it is 
true. However, it seems perfectly clear that the discrepancies do 
not mean real differences between the various specimens described. 
From Ludwig’s description it would seem that he has found them 
very nearly as here described. Unfortunately, his specimens, as I 
am informed by Professor R. Hesse, are not to be found and 
thus a reexamination has not been possible. On the other hånd I 
have had from the Museum of Vienna. through the kindness of 
Professor C. At tem s, one of the specimens of Perri er for re¬ 
examination, and it proved to agree very well with my specimen, 
the only difference being that the large, imbricating scales do not 
show the same regular arrangement. Also the small plates are 
somewhat different, being less glassy, with more holes than in my 
specimen. Of course, it would be desirable to have the type specimen 
also reexamined. But until that has been done and direct proof 
has been given that it does not agree with the specimens examined 
by Perri er and myself, being devoid of the large scales, I must 
refer, in accordance with Per ri er and Ludwig, these specimens 
to Cucumaria Hiittoni. 
13. Phyllophorus longidentis (Hutton). 
Thyone longidentis. Hutton. 1872. Cat. Echinod. N. Z. p. 16. 
— caudata. Hutton. 1872. Ibidem; p. 16. 
Peutadactyla longidentis. H utton. 1879. Notes on some N. Z. Echinod. 
Trans. N. Z. Inst. XI. p. 307. 
Thyone — Théel. 1886. ‘‘Challenger” Holoth. II. p. 141. 
Thyonidiam rugosum. Théel. Ibidem, p. 95, PI. V. 5 . 
— caudatum. Théel. Ibidem, p. 147. 
— longidentis. Dendy. 1896. Observ. Holoth. N. Z. Journ. 
Linn. Soc. Zool. XXVI. p. 42. PI. 6. 62 — 69 - 
— — Farquhar. 1898. Echinod. Fauna N. Z. Proc 
Linn. Soc. N. S. W. p. 326. 
