EXPLANATION OF PLATE XXXVI. 



Fig. L — Cassidea turgid a, Reeve, var., from a specimen 

 101 mm. long. This figure is accidentally foreshortened. 



Fig. 2. — Cassidea thomsoni, Brazier (type). 



Fig. 3. — Cassidea thomsoni, Brazier, another specimen taken 

 by the "Thetis." 



