3i ' 



radula of a male specimen from Stat. 33, has the teeth in 3 longitudinal rows, so the species 

 belongs without doubt to the Rachiglossa, which seemed t<> be still a little doubtful to some 

 authors. They are placecl in about 90 subsequent rows ; the median tooth (M) is rather broad, 

 with a curved base and 5 cusps, of which the median one is somewhat shorter than the lateral 

 ones; the laterals (1) have the buccinoid type, with two strong cusps, of which the distal one, 

 if the radula be expanded, is by far the largest. Kobelt (1. c. p. 314) writes on the genus: 

 "wenn Hindsia (= Nassaria) wirklich zu den Rachiglossen gehort". 



The operculum seems to have a terminal nucleus, but serrate margins; with 7 teeth on 

 the left, 8 on the right side-, this is not in accordance with the description of Adams, who 

 (l.c. p. 182) says: "Operculum horny, ovately unguiform, the margin entire". This statement 

 has been translated by Sowerby (l.c. p. 85) in latin. Kobelt does not mention it. Tryon, 

 (1. c. p. 104) says nothing about the margins. Tryon's figure of the radula of N. acuminata 

 (l.c. PI, 27, fig. 34) differs but little from my figure, but the median tooth is 6-cuspidate, with 

 2 smaller central cusps, bis figure is a copy of that of Troschel (Archiv für Naturgesch. 1868, 

 pi. 3, fig. 4) which I have not at hand. 



3. Nassaria acuminata Reeve. 



REEVE. Proc. Zool. Soc. Lond. 1844, p. 116. 



Conch. Ie. Vol. II, Triton, fig. 54. 



Sowerby. Thes. Conchyl. Vol. III, p. 85, PI. 1, fig. 10. 



Kobelt. Martini-Chemn. Conch. Cab. Ed. II, Vol. III, Hindsia, p. 316, PI. 76, fig. 7, 8. 



TRYON. Man. of Conch. Vol. III, p. 221, PI. 84, fig. 539, 540. 



Stat. 51. Madura-bay. 69 — 91 M. Fine grey sand, coarse sand with shells and stones. 3 Spec. 

 Stat. 260. Nuhu Jaan, Kci-islands. 90 M. Sand, coral and shells. 1 Spec. 

 Stat. 289. 9 o'. 3 S., I26°24'.5E. 112 M. Mud, sand and shells. 1 Spec. 



A specimen from Stat. 100 is a young worn shell, having some resemblance with 

 this species, but slightly differing in sculpture, the canal is broader and 1 see narrow brown 

 lines. I cannot refer it to another known species ; it is too bad for description, so I only wish 

 to mention it. 



Fam. Nassidae. 



Nassa Lamarck. 



1 . Nassa arcularia Linné. 



Linné. Syst. Nat. Ed. X, p. 737, N" 395. 



KlENER. Coq. Viv. Vol. VIII, Buccinum, p. 94, PI. 28, fig. 115. 



REEVE. Conch. Ie. Vol. VIII, Nassa, fig. 25. 



KOSTER. Martini-Chemn. Conch. Cab. Ed. II, Vol. III, Buccinum, p. 18. Tl. 4, fig. 19 — 21. 



TRYON. Man. of Conch. Vol. IV, p. 24, PI. 7, fig. 9, 10. 



Stat. 16. Bay of Kankamaraan, S. coast of Kangeang. 22 M. 1 Spec. 



Stat. i'j. Sailus ketjil, Paternoster-islands. 27 M. and less. Coral and coralsand. 1 Spec. 



Stat. 89. Pulu Kaniungan ketjil. Reef. 1 Spec. 



Stat. 169. Atjatuning, West coast of New Guinea. Reef. 1 Spec. 



Stat. 231. Amboina. Reef. 1 Spec. 



65 



SIBOGA-l Xl'EDlTIE XLIX 1 d. 41 



