DENTAL1UM.— Plate I. 



(The specimens, unless otherwise indicated, are from the collection of H. Cuming, Esq.) 



Fig. 



1. rectum, Sp. 32, Gmel. — D. elephantinuru, Desk., not Lin. — 



D. striatum, Mart. Adriatic. 



2. formosum, 34, Ad. Sf Reeve, Voy. Sam.arany, p. 71. .Sooloo 



Archipelago. 



3. Vernedei, 33, Hartley. — D. grande, Desk., foss. ? Japan. 



Collection of R. M'Andrew, Esq. 



4. elephantinum, 36, Linn. — D. arcuatum, Gmel., Beth. 



Philippines. 



5. 6. aprinum, 37, Linn. — D. striatulum, Gmel. St. Nicholas, 



lsl. Zebu, Ph., II. Cuming. 



7. interstriatum, 38, Soivb. Jun. Isl. Bohol, Ph., Cum. Am- 



boyna. 



8. bisexangui.atdm, 35, Sowb. Jun. Java. 



9. octogokum, 41, Lamk. China. 



10. hexagontjm, 43, Gould. N. America. Also China and Sin- 



gapore. 



11. sexcostatum, 44, Sowb. Jun. Hab. ? My own specimen, 



unique. 



12. Javanum, 39, — ? Java, Malacca. 



13. Zelaxdicum, 31, Sowb. Jun. New Zealand. 



