1 72 



denticle which is separated from the body, by ;i distinct sinus; the outer one lias 8 or g denticles 

 and a ven thin plal triangular shape. [f the teeth lay in their natural position 



the uncini i • ther in such a degree, that their arrangement is scarcely clear, so it 



mieht be that :1 the appreciation of what is the inner and outer of the uncini. 



This description I) in part with that of the radula of Planaxis by Trosc ('n-biss 



der Schi ' I. !>■ 150, 151, PI. 12, fig. 7—01. for though the rhachidian tooth is reallj 



of tl' on, the uncini an- quite different by tin- latera] appendices. In this respect 



thej with Ceritkidea and Pyrazus il. c. PI. 12, fig. 4 and 5), I have conscquently 



Lample of Fischer (Manuel de Conchyliologie) Tryon (1. c) and others, who 



as a subgenus of Planaxis-. 1 think that its conchological character of the 



columella, together with the differences in the radulae, wil] be fully sufficiënt, to keep 



1 separate. 



l-'am. Mi 'in 1 1 1 > \i . 

 Modulus Gray. 



1. Modulus tectum Gmelin. 



GMELIN. Syst. Nat. Ed. XIII. p. 3569. 



Tky<>\. Man. of Conch. Vol. IX, p. 260, PI. 48, tig. 87. 



Stat. 17. Sailus-Ketjil, 1'aternoster-islands. 27 M. Coral and coralsand. 1 Spec. 

 Stat. ? 1 Spec. 



Both specimens are still yo.ung, that from Stat. 37 is moreover broken, but sufhciently 

 characteristic. 



1'am. TrIPHORIDAE. 

 Triphora Blainville. 



1. Triphora (Euthymia) princeps Sowerby. 



Proc. Mal. Soc. Lond. VI, 1904, p. 174 (fig.). 

 Stat. 60. Haingsisi, Samau-island. Keef. 1 Spec. 



The only specimen, though young lit has only a length of 24 Mill. instead of 57) is still 

 a giant in the genus. Sowerby (l.c.) did not know the habitat of this species, described after 

 ;iecimen, from the collection of the late admiral Keppel. 



2. Triphora (Euthymia) sculpta Hinds. 



HlNDS. A1111. and Mag. "f Nat. Ilist. Vol. XI, 1843, p. 17. 

 TRYON. Man. of Conch. Vol. IX. p. 17S, PI. 37, fig. 82, 83. 



1. Kilsuin, West cuast of Kur-island. 27 M. ('mal and Lithothamnion. 1 Spec. 



64 



