544 
F. PURCELL. 
pophysis (text-fig'. 16 and fig. 8, ec.t. 8) for tlie attachment of 
the muscles 1 — 3. The hollow entapophysis of Caponia 
much resembles the solid one of the Oonopidge (fig. 1), and 
muscle N^o. 4 in the former corresponds exactly as regards 
its place of attachment to the muscle 38 in the latter, although 
not homologous with it. 
The muscular system of the abdomen of Caponia is in 
some respects very peculiar. That connected with the respi- 
ratory segments (with the exception of the muscles of the 
oviducts) is given in text-figs. 16 — 18 and explained in the 
following list : 
List of the Muscles in Text-figs. 16 — 18.’ 
1 and 2. From the entapophysis ec.t. 8 to upper and middle 
part of side of abdominal pedicel. 
3. Longitudinal from the entapophysis ec.t. 8 to the cephalo- 
thorax. 
4. From lower lobe of the entapophysis ec.t. 8 to ventral 
integument of anterior respiratory segment. 
5. From upper part of side of abdominal pedicel to ventral 
integument of anterior respiratory segment. (1 and 5 are 
inserted together anteriorly.) 
6. Dorso- ventral on side of pedicel. (2 and 6 are attached 
to the same ectodermal infolding on the medial side of 5.) 
7. Oblique dorso-ventral from hinder end of the ectodermal 
tendon ec.t. to the ventral fold/d. 1 of abdominal pedicel. 
8. Oblique doi’so-ventral from hinder end of the ectodermal 
tendon ec.t. to the integumental fold fid. 2 on lateral side of 
posterior spiracles. 
9. From the ectodermal tendon ec.t. to anterior integument 
of abdomen. 
10. Two muscles from the ectodermal tendon ec.t. to dorsal 
integument of abdomen. 
11. Short muscle from lateral part of posterior (upper) wall 
‘ Throughout this paper homologous muscles ai’e indicated by the 
same numbers. 
