3i9 



The Siboga-specimens of this very curious and interesting species, exactly agree with 

 Watson's description and figure. His specimens came from the Philippines, from a depth of 

 375 fathoms. 



21. Nassa (Zeuxis) tacnia Gmelin. 



Gmelin. Syst. Nat. Ed. XIII, p. 3493. 



KlENER. Coq. Viv. Vol. VIII, Buccinum, p. 59, PI. 15, fig. 53 (olivaceum). 



Reeve. Conch. Ie. Vol. VIII, Nassa, fig. 19 {olivacea). 



KOSTER. Martini-Chemn. Conch. Cab. Ed. II, Vol. III, Buccinum, p. 38, PI. 8, fig. 8, 9. 



Tryon. Man. of Conch. Vol. IV, p. 30, PI. 9, fig. 76, yy. 



Stat. 86. Dongala, Palos-bay, Celebes. Reef. 1 Spec. 



Stat. 213. Saleyer. Up to 36 M. Mud and mud with sand. 2 Spec. 



The specimens of this rather common species are very characteristic. 



22. iVassa (Zeuxis) canaliculata Lamarck. 



LAMARCK. An. s. vert. Ed. II, Vol. X, p. 161. 



KlENER. Coq. Viv. Vol. IV, p. 31, PI. 9, fig. 83 — 85. 



REEVE. Conch. Ie. Vol. VIII, Nassa, fig. 18. 



KüSTER. Martini-Chemn. Conch. Cab. Ed. II, Vol. III, Buccinum, p. 32, PI. 7, fig. 8, 9. 



Tryon. Man. of Conch. Vol. IV, p. 31, PI. 9, fig. 83 — 85. 



Stat. 4. Djangkar (Java). 9 M. Coralsand. 1 Spec. 



Stat. 19. Bay of Labuan Tring, West coast of Lombok. 18 — 27 M. River mud, coral, coral- 

 sand. 3 Spec. 

 Stat. 50. Bay of Badjo, West coast of Flores. Up to 40 M. Mud, sand and shells. 4 Spec. 

 Stat. 116. West of Kwandang-bay-entrance. 72 M. Fine sand with mud. 1 Spec. 

 Stat. 213. Saleyer. Up to 36 M. Mud and mud with sand. 5 Spec. 

 Stat. 289. 9°o'-3S., I2Ó°24'.5E. Timor Sea. 112 M. Mud, sand and shells. 1 Spec. 



The specimens vary considerably in size, colour, more or less ribbed spire and even in 

 the distinctness of the sutural canal. The species is no doubt allied to N. taenia and unicolor, and 

 I think has been often mixed with these species. Küster is in doubt if Reeve's fig. 18 belongs 

 to this species. I should incline to think that Reeve's fig. 17 (unicolorata) agrees better with 

 this species, than with Kiener's B. unicolorum, at least Kiener's figure shows no tracé of a 

 canaliculate suture, as Reeve's fig. 1 7 does, and Kiener's description does not mention it, 

 moreover the shell of Kiener is much more elongate. I have united those specimens which 

 show a distinct, though not always large channel, without regard to the other, most inconstant 

 characters, as size, colour and number of ribs, which merge insensibly into each other. 



23. Nassa (Zeuxis) unicolor Kiener. 



KlENER. Coq. Viv. Vol. VIII, Buccinum, p. 60, PI. 19, fig. 69. 

 Tryon. Man. of Conch. Vol. IV, p. 31, PI. 10, fig. 88. 



Stat. 47. Bay of Bima, near South fort. 55 M. Mud with patches of fine coralsand. 1 Spec. 

 Stat. 213. Saleyer. Up to 36 M. Mud and mud with sand. 1 Spec. 



73 



SIBOGA-EXPED1TIE XLIX'rf". 42 



