PLATE XXVII. 



Astacojysis paramattensis (p. 202). 



Fis:. 1. Dorso-lateral view, natural size. 



,, le. First siagnopod; 1, 2, 3, 4, homologues of the four respective joints of the 

 typical limb — coxa, basis, ischium, and meros ; spines and hairs enlarged. 



,, If. Second siagnopod, figures as before. 



,, \g. Third siagnopod, figures as before ; ec, basecphysis. 



„ l/i. First gnathopod, figures as above ; 5 carpos, 6 propodos, 7 dactylos ; pb, 

 podobranchial plume ; arb, arthrobranchial plume ; ec, ecphysis. 



„ li. Second gnathopod, figures as before ; pb, podobranchia ; arb, arthro- 

 branchia. 



„ lm". Podobranchia of third pereiopod attached to the mastigobranchial plate. 



„ lm"'. Section of the mastigobranchial plate and podobranchia of third pereiopod, 

 with hairs from the surface of the former ; magnified. 



Astacopsis sydneyensis (p. 204). 

 ,, 2. Dorsal view of the specimen ; enlarged twice. 



