576 T, A. STEPHENSON 
microcnemes although less fully formed than the perfect 
mesenteries. 
Puysa.—See Capitulum. 
ProrocNeME.—The first four bilateral couples! of 
mesenteries to be formed in a Zoanthactiniarian. 
Scapus.—see Capitulum. 
SpuincteR.—tThe sphincter usually referred to in this 
paper is the one running round within the upper margin of 
the body, outside the tentacle-bases, in many anemones. It 
may be embedded in the mesogloea of this region (meso- 
gloeal), or its fibres may be supported on processes of meso- 
gloea which project into the endoderm (endodermal). It 
may be spread out a good deal (diffuse) or gathered up into 
a definite sharply marked-off cord, which at its best forms 
a marked projection from the body-wall into the coelenteron 
(circumscribed). There are various intermediate grades 
between diffuse and circumscribed, and various degrees of 
strength in sphincters. 
STICHODACTYLINE Condition of tentacles. This is the 
term used to denote the state of affairs in which more than 
one tentacle communicates with at least some of the endocoels, 
sometimes with all endocoels, and with exoccels also. 
VeRRUCAE.—These are local, slightly differentiated 
sucker-like warts or slightly hollow outgrowths of the body- 
wall, and often they attach foreign bodies to themselves. 
VesrcLes.—tThese are truly hollow, bladder-like exten- 
sions of the coelenteron into outgrowths of the body. They may 
be delicate and thin-walled, simple or compound, and some 
times are well provided with nematocysts. 
1 See foot-note on p. 574 
