22 
Dåderlein (Die Echinoiden der deutschen Tiefsee-Expedition) 
discusses the claviform pedicellariæ (p. 76) and records their occur- 
rence in the Aspidodiadematidæ as also in Micropyga tuberculata 
(p. 171). Finally in Agassiz and Clark's work: "Hawaiian and 
other Pacific Echini. The Salenidæ..... and Diadematidæ” (Mem. 
Mus. Comp. Zool. XXXIV, 1908) the claviform pedicellariæ of the 
Diadematidæ are mentioned p. 105. 
It thus appears that the "eystacanths” of Professor Agassiz 
have been very well known for a rather long time. The fact alone 
is new that they occur also in Podophora, Colobocentrotus and in 
Chætodiadema pallidum. Professor Agassiz's suggestion of the 
affinities. of these organs to the sac-bearing spines of Echinothuriæ 
is certainly untenable; the stalk shows exactly the same structure as 
the stalk of the corresponding pedicellariæ, quite different from the 
exquisite fenestrated tubes which form the small sac-bearing spines 
of the Echinothurids. This I have already 'pointed out in the 
"Siam-Echinoidea” (I, p. 39). I may further recall the fact that in the 
spines of the Echinothurids there is only a single gland, while in 
the claviform pedicellariæ three glands are always found. The sug- 
gestion that "they may be modified sac-bearing spines” may thus 
be left out of consideration, and even the second alternative pro- 
posed by Professor Agassiz that they may be. "modified pedicel- 
lariæ in which the glands have developed into the glands of the 
cystacanths at the expense of the valves" is incorrect, if Professor 
Agassiz means by the glands of the pedicellariæ those glands 
found on the valves of the globiferous pedicellariæ, and this seems 
to me to be the meaning. The glands of the claviform pedicellariæ 
are homologous to the glands on the stalk of the corresponding 
pedicellariæ, as was already shown clearly by Foettinger, the 
first author to describe these organs. 
In short, the name "Cystacanths” cannot be accepted, first on 
account of priority, these organs having been known for a long 
time as "claviform pedicellariæ” or as "Globiferæ”, which latter 
name also cannot be used; next because this name indicates a rTe- 
