408 PROCEEDINGS OP THE ACADEMY OF [July, 



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EXPLANATION OF PLATES XIX, XX, XXI. 



PLATE XIX (figures natural size), Fig. 1. Venus hirasei. pp. 205, 400. 



Fig. 2. Area nipponensis, pp. 209, 402. 



Figs. 3, 4.Petricola cyclus, pp. 204, 400. 



Fig. 5. Tapes phenax, p. 207. 



Fig. 6. Tapes platyptycha, p. 206. 



Fig. 7. Petricola cyclus var. sculpturata, p. 205 (Ceylon). 



Fig. 8. Tellina pristiformis, p. 400. 



Fig. 9. Anatina impura, pp. 208, 402. 



Figs. 10, 11. Acmcea heroldi var. signata, p. 202. 



Fig. 12. Lima Mans var. hirasei, pp. 209, 402. 



Fig. 13. Solen roseomaculatus, p. 399. 



Figs. 14, 15. Cerithium chemnitzianum, p. 393. 



Fig. 16. Echinella cumingi luchuana, pp. 198, 394. 



Fig. 17. Euthria hokkaidonis, p. 389. 



Fig. 18 Peristernia ustulata var. luchuana, pp. 197, 390. 



PLATE XX (fig. 19 much enlarged, the others natural size), Fig. 19. 

 Donax kiusiuensis, p. 400. 

 Fig. 20. Venus hirasei, p. 400. 



Fig. 21. Chrysodomus intersculptus var. f rater, pp. 197, 391. 

 Fig. 22. Buccinum hirasei, p. 391. 

 Fig. 23. Chrysodomus pericochlion, p. 391. 



PLATE XXI (figures much enlarged), Fig. 24. Tritonidea submen- 

 keana, p. 387. 



Fig. 25. Syrnola bacillum, p. 394. 

 Fig. 26. Daphnella fragilis var. articulata, p. 385. 

 Fig. 21.Turbonilla varicifera, pp. 198, 395. 

 Fig. 28.Mitra vanattai, p. 387. 

 Fig. 29. Eulima luchuana, p. 396. 

 Fig. 30. Eulima dunkeriana, p. 395. 

 Fig. 31. Mitra hizenensis, p. 386. 

 Fig. 32. Cantharidus hirasei, p. 199. 

 Fig. 33. Cantharidus bisbalteatus, p. 199. 

 Fig. 34. Clanculus gemmiilifer, p. 200. 

 Fig. 35. Clanculus hizenensis, pp. 201, 398. 

 Fig. 36. Columbella miser a var. californica, p. 390. 

 Figs. 37, 38. Columbella miser a, p. 389. 

 Fig. 39. Columbella misera var. polynyma, pp. 196, 390. 



