PLATE 50 



(After Eathbun) 



Vca musica, male holotype, X 1% . Pichilinque Bay, Gulf of California. 



(Page 280.) 

 Fig. 1. Anterior view. 

 Fig. 2. Antero-dorsal view. 

 Fig. 3. Dorsal view. 

 Fig. 4. Ventral view. 



[458] 



