PLATE XLIV. 



Hemipen&us spinidorsalis (p. 301). 

 Fig. 1. Lateral view ; one-half enlarged. 

 ,, 1". Branchiae, seen in position. 

 ,, 1'". Mastigobranchia, with podobranchial plume attached. 



Hemipenseus gracilis (p. 302). 

 ,, 2. Lateral view ; one-half enlarged. 



Hemipenasus speciosus (p. 303). 

 „ 3. Lateral view. 



Hemipenseus virilis (p. 303). 

 ,, 4. Lateral view. 



