THE NAUTILUS, 1889. PiAsvE lr 
17. 18. 19. 
1, 2,3, P. cultratus. 9) P. coca: 15, B. pinguis. 
4, A. excentricus. 10, B. compressicollis. 15, B. proelongus. 
6, 7, P. calamitosa, 11, 16, B. pinguis vur. 14, B. geoffreyt. 
8, B. armandt. IS Caedintatus: sli, Fe radiate. 
18, B. alboreflexus. 19, B. cantor?, v. octonus. 
