The Morphology of a Solenogastre. 733 
Explanation of plates. 
The following abbreviations have been used in the explanation of the 
figures : 
a anus 
b brain 
be buccal commissure 
b. g labio-buccal ganglion 
br gill 
cl cloaca 
e. p gonoduct 
f. 0 buccal plate 
gon gonad 
ht heart 
int intestine 
liv liver 
m mouth 
n nerve to buccal plate 
oe oesophagus 
p. © pedal ganglion 
pl lateral ganglion 
pem pericardium 
p. s pedal sinus 
r. s radula support 
s anterior vertical septum 
s. ec subradular commissure 
s. g salivary gland 
sr dorsal gill retractor 
sto stomach 
sro subradular organ 
vr ventral gill retractor 
v. s ventral diaphragm. 
Plate 42: 
Fig. 1—18 muscles of buccal mass. 
Fig. 1. Limifossor talpoideus, side view, living specimen. 5:1. 
Fig. 2. Anterior end, living specimen, showing extremes of motion 
of the frontal sense organ. 15:1. 
Fig. 3. Anterior end, longitudinal section, giving relations of digestive 
tract, radula and blood sinuses. 
The dorsal aorta is shown opening into 
head cavity in slightly diagrammatic fashion. The middle constriction of 
the stomach is unusual. 
Fig. 4. Section through anterior end of radula and frontal sense 
organ. Animal in same state of contraction as Fig. 19. 33:1. 
AT 
