3° 



5. Astralium (Cyclocantha) laciniatum Gould. 



Gould. Proc. Boston Soc. Nat. Hist. Vol. III, 1849, p. 90. 



Kiener. Coq. Viv. Calcar, p. 29, PI. 79, fig. 3, 4. 



TRYON. Man. of Conch. Vol. X, p. 232, PI. 53, fig. 32, 33. 



Stat. 96. South-east side of Pearl-bank. Sulu-Archipelago. 15 M. 2 Spec. 



Stat. 99. North-Ubian. 16 — 23 M. Lithothamnion-bottom. 1 Spec. 



Stat. 174. Waru-bay, North coast of Ceram. Reef. 1 Spec. 



Stat. 240. Banda. 9 — 45 M. Lithothamnion-bottom. 1 Spec. 



Stat. 315. East of Sailus Besar, Paternoster-islands. Up to 36 M. Lithothamnion-bottom. 2 Spec. 



The specimen from Stat. 1 74, is the only one which is adult and agrees with Kiener's 

 fig- 3i t>ut it is a rather bad shell, covered with incrustations and inhabited by one of the 

 Paguridac. The other specimens are young and agree with Gould's description and fig. 4 

 of Kiener, though they are still younger. Such juvenile specimens, always remain somewhat 

 uncertain, unless one has large series of specimens for comparison. Tryon sees in laciniatum 

 only a variety of A. calcar Lin. 



6. Astralium (Cyclocantha) lapillus Reeve. PI. II, fig. 2. 



Reeve. Conch. Ie. Vol. XIII, Trochus, fig. 65. 



Stat. 240. Banda. 9 — 45 M. Lithothamnion-bottom. 1 Spec. 



Stat. 282. Between Nusa Besi and the N.E. point of Timor. 27 — 54 M. Sand and Lithotham- 



nion. 3 Spec. 

 Stat. 315. East of Sailus Besar, Paternoster-islands. Up to 36 M. Lithothamnion. 1 Spec. 



The specimen from Stat. 315 agrees exactly with Reeye's figure and description, but it 

 is smaller. Mr. E. A. Smith has had the kindness to compare it with the type in the British 

 Museum, and has approved my identification ; the specimen from Banda is younger, but agrees 

 in most respects with the other one. Of the specimens from Stat. 282, the smallest agrees with 

 that from Banda, but is smaller, another differs only slightly from the specimen from Stat. 315, 

 but the third, which is much larger, has long puzzled me, untill I observed that the upper 

 whorls agree exactly in sculpture, with those of the other specimens, from the same locality, 

 and so I am convinced, that it represents the adult state of the typical A. lapillus, which has 

 a somewhat juvenile appearance. Most of the specimens are strongly covered with incrustations, 

 which render it impossible to count the whorls. This large specimen seems to have nearly one 

 whorl more, which gives to the shell a .very different aspect, this whorl being much flatter than 

 the upper ones, the ribs are less nodulous; the whorl is rather sharply keeled and this keel 

 bears in the specimen before me, towards the aperture, two broad lamellae, succeeding the 

 spines of the penultimate whorl. These lamellae are of an irregular shape, they are sculptured 

 with spiral ribs on the upper surface, the basal surface being slightly concave, with indistinct 

 spiral lirae and fine radiating lamellae; the margin is more or less lobed. The aperture has 

 rose-coloured margins. The interior of the aperture is grooved at some distance from the 

 margin; only the groove corresponding to the keel, reaches the outer margin. The operculum 



3° 



