Plate 16 



Fig. 1. Nassa dermestina Gould. Kikaia [Kikaigashima, Ryukyu Islands]. Holotype 



USNM 24166, original no. 1535. Height 8, width 4 mm. (5 x). 

 Fig. 2. Nassa mustelina Gould. Ousima [Amami-O-shima, Ryukyu Islands], in 2 fathoms. 



I tolotype USNM 24200, original no. 1554. Height 12, width 8 mm. (3 x). 

 Fig. 3. Nassa quantula Gould. Simon's Bay [Cape of Good Hope]. Holotype USNM 



244. Height 7, width 3 mm. (5 x). 

 Fig. 4. Nassa optata Gould. Sydney Harbor [New South Wales, Australia]. Lectotype 



MCZ 169270. Height 10, width 5 mm. (3.4 x). 

 Fig. 5. Nassa beata Gould. Loo Choo [Okinawa, Ryukyu Islands]. Holotype USNM 



2018. Height 10, width 6 mm. (5.5 x). 

 Fig. 6. Nassa plebecula Gould. Ousima [Amami-O-shima, Ryukyu Islands]. Lectotype 



USNM 24168, original no. 1548. Height 11.1, width 5.5 mm. (5 x). 

 Fig. 7. Nassa spurca Gould. Simon's Bay [Cape cf Good Hope]. Holotype USNM 



1661. Height 10, width 6 mm. (5.5 x). 

 Fig. 8. Neptunia arata Gould. Hab.r Holotype USNM 36723. Height 23, width 1C 



mm. (2 x). 

 Fig. 9. Narica ovoidea Gould. [Mazatlan, Mexico.] Holotype MCZ 169273. Height 8, 



width 5 mm. (3.4 x). 

 Fig. 10. Nerita pica Gould. S[h]imoda [Japan]. Lectotype USNM 1616. Height 20, 



width 20 mm. (1.3 x). 

 Fig. 11. Neritella [(Clithon)] penicillata Gould. New Ireland [Bismarck Archipelago]. 



Holotype USNM 664. Height 15, width 10 mm. (2 x). 

 Fig. 12. Natica [Lunatia] puerilis Gould. Port o Praya [Praia, Cape Verde Islands], 



Lectotype USNM 177893. Height 10, width 8 mm. (2 x). 

 Fig. 13. Natica [Lunatia] caurina Gould. Straits of [Juanjde Fuca [Washington]. Lecto- 

 type MCZ 169081. Height 14, width 12 mm. (2.7 x). 

 Fig. 14. Natica [Lunatia] sever a Gould. Hakodadi [Hakodate] Bay [Japan]. Holotype 



MCZ 169369. Height 38, width 35 mm. (1.5 x). 



