TWO NEW SPECIES OF THE PHOHONIDEA. 
263 
Or there may be more in tlie anterior cavities as in Fig’. 3 ; 
24 I 24 
4 7 
Text-fig. 4. 
cnr. 
upt. 
'-■■f 
a.c. 
/•■ P9- 
^ 'A* . N.v ac. 
.. '4 
■} ■ — i ' 9.. 
da 
■• X- 
V- 
i St. 
•ti 
b ■ 4- op. 
Oi 
;a ' t- 
4-V 
vnt 
^■fL 
f' 
■-‘■-lines. 
c 
Transverse section through ampulla showing coelom divided into 
two anterior cavities («. f.) and one iiosterior cavity (p. c.). 
( X 150.) 
Slioi tly behind this region the posterior coelom appears to be 
undivided, or rather the left post-coelom merges with the 
anterior owing to the disappearance (Fig. 4) of the left lateral 
mesentery. 
Ph. hippocrepia, which in many ways closely resembles 
Ph. va nc on V e rensi s, shows in my sections only about 
twenty-eight fascicles of longitudinal muscles. Selys Long- 
