F. S. CONANT ON THE CUBOMEDUS^E. 59 



gc = ganglion cell. 



ge = gelatine of exumbrella. 



go gastric ostium. 



ys = gelatine of subumbrella. 

 hvl = horizontal vascular lamella. 

 i interradius. 



if interradial funnel of bell cavity. 

 ifr = interradial furrow. 



ivl = interradial vascular lamella. 

 I = lens. 



lv = lip of valve. 



m = bell margin. 



me = mucous cell. 

 mep = mesogonial pocket. 

 mo mouth. 

 mp = marginal pocket. 



mp' smaller marginal pockets, in Tripedalia. 

 mst muscle of stock of sensory club. 

 mt = muscle at base of tentacle. 

 n = nerve. 



nc = network cells, in sensory club. 



nf nerve fibres. 

 nm = nematocyst. 



nst = nerve of stalk of sensory club. 

 osn = outline of sensory niche. 



p =: perradius. 



pe = pedalium. 



ph = phacellus. 



pr = proboscis. 



r = reproductive organ. 



re = remains of concretion. 

 rcl radial canal. 



rg = radial ganglion. 

 rm radial muscle. 



rn radial nerve. 

 rns = root of nerve of sensory club. 

 rs ? = remains of stalk (?) of sensory organ. 



rt = retina. 

 s = stomach. 



sc = bell cavity. 

 scl sensory club. 

 sen = supporting cell of nerve. 



se = sensory epithelium. 



sh = shrinkage space. 



si = stalk of lens. 

 sla = supporting lamella. 



sn = sensory niche. 



.so = sensory organ in proboscis of Tripedalia. 



sp = stomach pocket. 

 spk stalk of phacellus. 



ss stalk of sensory organ, in proboscis. 



st = stalk of sensory club. 



