Though this species as stated above, is easily recognizable by its shorter, stouter shape, 

 its niaiiil)- stronger sculpture and especially by llu- two dark spots on llu; much thickened 

 peristome, its specific rank Is al least ver)- (pu'stionable. 



6. A'assa (.Ircu/ariaJ innucrsa Carpenter. 



Stat. 260. Near Nortli point of Nuhu Jaaii, Kci-islaiuls. 90 M. Sand, coral and siiclls. i Spec. 



Trvon says of this species in his index of \'<)1. IV (Man. of Conch.), that it is a 

 synon)-m of X. biniaciilosa. M.arrat (On the varieties of the shells belonging to the genus 

 Nassa, p. 74 X*^ 1249) considers it to be a variety of bii)iactilosa. I think the species is sufficiently 

 characterized by its enormously developed callosity, jiartly covering the spire, to be jjrovisionally 

 considered as a good species. The Siboga-specimen is bleached and slightly worn, but 1 have 

 a fresh specimen, formerly identified by Mr. E. A. Smith, from South-Sumatra (Lampongs), 

 which agrees in every essential respect. I failed to find the original description. 



7. Xassa (Arcularia) leptospira A. Adams. 



A. Adams, rroc. Zool. See. Lond. 185 1, p. 103. 



Reeve. Conch. Ic. Vol. VIII, Nassa, fig. 84. 



Trvon. Man. of Conch. Vol. IV, p. 25, PI. 7, fig. 24. 



Stat. 86. Dongala, Palos-bay, Celebes. Reef, i Spec. 



The specimen is of a rather stout shape, showing affinity to the next species. • 



8. Nassa (Arciilaria) globosa Quoy & Gaimard. 



QuoY & Gaimard. Voy. Astrolabe, Vol. II, p. 448, PI. 32, fig. 25 — 27. 

 KlENER. Coq. Viv. Vol. VIII, Buccinum, p. 10 1, PI. 27, fig. 108 {clatliratuiii). 

 Reeve. Conch. Ic. Vol. VIII, Nassa, fig. 62. 

 Tryon. Man. of Conch. Vol. IV, p. 26, PI. 8, fig. 37, 38. 



Stat. 86. Dongala, Palos-bay, Celebes. 36 M. Fine grey mud (river mud), i Spec. 

 . Stat. 174. Waru-bay, North coast of Ceram. 18 M. Mud. 2 Spec. 

 Stat. 323. Sangkapura-roads, Bawean-island. 12 M. Mud. 8 Spec. 



9. A^assa (Alectryon) elegans Kiener. 



Kiener. Coq. Viv. Vol. VIII, Buccinum, p. 56, PI. 24, fig. 97. 

 Tryon. Man. of Conch. Vol. IV, p. 27, PI. 8, fig. 47 [glans var.). 



Stat. 'H. Bay of Pidjot, Lombok. 22 M. and less. Mud, coral and coralsand. 5 Spec. 



Stat. 47. Bay of Bima, near South fort. Shore. 3 Spec. 



Stat. 71. Makassar and surroundings. Up to 32 M. Mud, sand with mud, coral. 7 Spec. 



Stat. 169. Atjatuning, West coast of New Guinea. 57 M. Mud. i Spec. 



Stat. 204. Between islands of Wowoni and Buton, Northern entrance of Buton-strait. 75 — 94 M. 



Sand with dead shells, i Spec. 



Stat. 313. East of Dangar Besar, Saleh-bay. Up to ■},6 M. Sand, coral and mud. 8 Spec. 



I think this species differs sufficiently from A^. glans to be kept separate. Tryon unites 

 it with N. glans as a variety, .but his description, mentioning "the revolving brown lines" of 



67 



