Bd. VI: 4) THE ECHINOIDEA. 57 



viridescente, spinis albescentibus; ambulacra decern bifariam poribus instructa; tuber- 

 culis minimis; spinis tenuibus et brevibus». 1 



In the Atlas of the »Voyage de la Fregate Venus», Zoophytes PI. 4, VALENCIENNES 

 gives an excellent, coloured representation of the species, naming it Echinus porosus. 2 

 That this is really the species now called Loxechinus albus cannot be doubted (how 

 L. ARASSIZ & DESOR could recognize it as Molina's Echinus albus is not so ap- 

 parent). In the same work is figured another species, Echinus erythrogrammus 

 (PI. 7. I.). On comparing a denuded younger specimen of L. albus with the quoted 

 figures of y>Ech. erythrogrammus* one must be struck with the close resemblance 

 with that species, and seeing further that the Ech. erythrogrammus is marked as 

 being from Chili, one cannot help thinking that it is really the same as Loxech. 

 albus, not the Australian species identified as Strongylocentrotus erythrogrammus by 

 A. AGASSIZ in the ^Revision of Echini». Wishing to have this question settled I 

 wrote to Professor JOUBIN, the director of the Museum d'histoire naturelb of Paris, 

 asking if he could possibly lend me the type specimen for direct comparison with 

 L. albus. With the greatest liberality, for which I cannot thank him enough, he 

 granted my request. 



There are two specimens, belonging to two quite different species. One is 

 Toxocidaris gibbosus (Val.); it is marked »Chili, M. Gay». The other, which is 

 evidently the specimen figured in the »Venus», and which must be regarded as the 

 type of the species erythrogrammus, has no locality — ■ it is only marked »Mrs. 

 Hombron et Jacquinot i84i». According to a communication from Prof. JOUBIN 

 these two gentlemen were the naturalists of the Expedition of »L' Astrolabe* and 

 »La Zelee», 1837 — 40. This expedition visited both South America and Australia 

 (Tasmania). The specimen may thus have come from either of these coasts. The 

 locality »Chili» given in the Atlas of the >;Venus» cannot be relied upon, as it 

 may probably have been taken from the other specimen. We cannot therefore con- 

 clude from the locality of the specimen, whether the name erythrogrammus ought 

 to belong to the South American species or to the Australian species with which it 

 was associated by A. AGASSIZ. — A close examination of the figures in the »Venus» 

 shows that there must have been made another mistake. It is easily seen that the 

 detailed figure of the actinal side, 1. b., cannot — if it is not very badly drawn 

 which does not at all appear to be the case — possibly belong to the same species 



1 The work is not found in the libraries of Copenhagen ; the above quotation I owe to Dr. R. Hart- 

 meyer at the Berlin Museum, who kindly copied for me the quotations wanted. The same was the case 

 with Molina's »Saggio sulla storia naturali del Chile* of which only translations are found in the Copen- 

 hagen libraries. 



2 The type specimen is not in the collection of the Museum d'hist. naturelle in Paris, as Professor 

 JOUBIN has kindly informed me. 



8 — 100133. Sch-vedische Sudpolar- Expedition iqoi — fgoj. 



