PLATE Y. 
Fig. 1. First maxilla of the larva shown in fig. 5. 
Fig. 2. Second maxilla of same. 
Fig. 3. Squilla {Alima) gracilis, from St. Vincent. Stage No. 3 ; 9 '18 mm. long (p. 84). 
Fig. 4. Gonerichthus larva, from St. Vincent (p. 113). 
Fig. 5. Erichthoidina. Ventral view of the anterior end of body of larva shown in 
PI. XII. fig. 1. 
Fig. 6. Abdominal appendage of the Coronis larva shown in PI. XII. fig. 4. 
Fig. 7. First antenna of the larva shown in PI. XII. fig. 3. 
Fig. 9. Telson of the larva shown in PI. XII. fig. 2. 
