I p I 



columellar margin with about :i teeth and a crenulated callosity at its upper part, bordering 



the posterior, rather wide sin ' rior sinus slightly larger and produced, columellar margin 



1 interiorly, towards the anterior sinus; margins of the aperture granulose in the interstices 



Long. 12, lat. 9, alt. 8 , MUI., smaller specimen Long. e, 1 ,,, lat. 7 1 /.,, alt. 6 1 /, MUL 



forma minor. PI. XI, fig. 4. 



.5 V, ii 9 40' E. Sulu Sea. 522 M. Stony bottom. 4 Spec. 

 :, 1;. I is-Besar, Paternoster-islands. Up to 36 M. Coral and Lithothamnion. 1 Spec. 



from Stat. 95 are stil] smaller, being only 7'/, MUI. in length, but agree 

 j n m ts, in sculpture with the type, however the ribs are slightly coarser, the teeth of 



the right margin less numerous (15 and 17), the other specimens and that from Stat. 315 are a 

 doubtful, as they are still considerably smaller, length only 6 MUL, the aperture is not so 

 and the right margin thicker-, as they are dead shells, I prefer to keep them under one 

 name with the variety, instead of describing a new species on a few gradual dirferences. This 

 species with its variety, differs from the former one, by its much more numerous ribs with 

 numerous intermediate ones, the larger number of teeth and inflated shape. 



Erato Risso. 



1. Erato gallinacea (Hinds Mss) Reeve. 



REEVE. Conch. Ie. Vol. XV, Erato, fig. 7. 



WEINKAUFF. Martini-Chemn. Conch. Cab. Ed. II, Vol. V, Erato, p. 150, PI. 24, fig. 14. 15. 



TRYON. Man. of Conch. Vol. V, p. 10, PI. 4, fig. 46. 



Stat. 37. Sailus Ketjil, Paternoster-islands. Up to 18 M. Coral and coralsand. 2 Spec. 

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

 Stat. 25S. Tual, Kei-islands. 22 M. Lithothamnion, sand and coral. 1 Spec. 



The specimens agree very will with the figures and descriptions, but they have small 

 granules on the spire and towards the base of the shell. 



Fam. Amphiperasidae Adams. 

 Amphiperas Gronovius. 



1. Amphiperas ovum Linné. 



LlNNÉ. Syst. Nat. Ed. X, p. 72;, X' ^z~ . 



I: ;in. Amb. Rariteitkamer, p. 115, PI. 38, fig. Q. 



Kii ' ■ oq. Viv. Vol. I. Ovula, i>. 3, PI. t and PI. 3, tig. 5 [pviformis). 



REEVE. Conch. Ie. Vol. XV, Ovulum, fig. 3. 



WE1NKAI FF. Martini-Chemn. Conch. Cab. Ed. II. Vol. V, Ovula. y. [68, Tl. 44, fig. 2, 4, 5. 



Tryon. Man. of 1 onch. Vol. VII, p. 246, PI 1. fig. 11. 12. 



Stat. 213. Saleyer. Keef. 1 Spec. 

 t. 231. Amboina. Keef. 1 Spec. 



1. Pepela-bay, East coast of Rotti-island. 22 M. Mud, coral and Lithothamnion. 1 Spec. 



32 



