8 4 
BULLETIN OF THE BUREAU OF FISHERIES. 
PLATE XIV. 
Fig. i, 2. Balanus crenatus Brugui&re. Top and lateral views of the walls of an individual of the solitary conic form. 
Fig. 3. Tergum of the same individual. 
Fig. 4. Balanus crenatus , columnar or colonial type. Profile of scutum. No. 38672, U. S. National Museum. 
Fig. 5, 6. Tergum of same individual. 
Fig. 7, 9. Scutum of same individual. 
Fig. 8. Colony of the columnar type. 
PLATE xv. 
Fig. 1, 2. Balanus hoekianus Pilsbry. Lateral and top views of the walls of the type. 
Fig. 3, 4. Balanus callistoderma Pilsbry. Tergum of the type, no. 38690, U. S. National Museum. 
Fig. 5. Profile of scutum, occludent aspect, same individual. 
Fig. 6, 7. Scutum of same example. 
plate xvi. 
Acasta spongites japonica Pilsbry. 
Fig. 1, 2. Tergum of the type, no. 38681, U. S. National Museum. 
Fig. 3. Walls, lateral view. 
Fig. 4, 5. Scutum. 
Fig. 6-9. Plates of the wall, internal aspect. 6, rostrum; 7, rostral latus; 8, carinal latus; 9, carina. 
PLATE XVII. 
Pachylasma crinoido philum Pilsbry. 
Fig. 1-3. Top, lateral, and rostral views of the type. 
Fig. 4, 5. Scutum of same individual. 
Fig. 6-9. Plates of the wall. 6, rostrum; 7, rostral latus; 8, median latus; 9, carinal latus. 
Fig. 10, 11. Tergum, same individual. 
