THE ANNALS 
AND 
MAGAZINE OF NATURAL HISTORY. 
[SIXTH SERIES.] 
“ per litora spargite museum, 
Naiades, et circiim vitreos considite fontes : 
PoUiee virgineo teneros hie carpite flores : 
Floribus et pictum, divae, replete canistrum. 
At vos, o Nymphse Craterides, ite sub undas ; 
Ite, recurvato variata corallia trunco 
Vellite muscosis e rupibus, et mihi conchas 
Ferte, Deae pelagi, et pingui conchy lia succo.” 
N. Parthenii Giannettasii Eel , 1 » 
No. 31. JULY 1890. 
I. — On certain Points in the Anatomical Nomenclature of 
EcMnoderms. By P. Herbert Carpenter, D.Sc., F.R.S., 
F.L.S., Assistant Master at Eton College. 
The object of the following paper is to put in a plea for a 
greater precision of nomenclature in works on Echinoderm 
morphology than has been hitherto adopted by many authors, 
more especially those who have made incidental rather than 
special studies in some branch of Echinoderm research. 
Many of them are justly distinguished in other lines of scien- 
tific work ; but, owing to their imperfect acquaintance with 
the current Echinoderm literature, a vagueness and inaccuracy 
of nomenclature have crept into their writings in a manner 
which is both perplexing to the student and vexatious to the 
specialist. 
I refer more especially to the frequent use of the same term 
for two or more structures which are not mutually homolo- 
gous *, while, on the other hand, there are some cases in 
* Since writing the above lines I have come across the following re- 
marks by Herouard on the same subject: — “ Ce sont la des questions de 
•detail, il est vrai, mais sur lesquelles j ’insiste a dessein, car ces denomi- 
nations identiques attributes par les differents auteurs et meme parfois, 
comme je viens de le dire, par un seul et meme auteur, a des organes 
Ann . & Mag . N. Hist. Ser. 6. Vol. vi. 1 
