27 



without the spines, being- only lo Mill.; its upper surface being quite smooth, in accordance with 

 the other specimens. The other specimen from Stat. 251 is a broken shell. The third specimen 

 from Stat. 253, though still young is a splendid shell. At first I thought it would be a new 

 species, as I found some differences with the original description, which Dr. Jousseaume had 

 the kindness to copy for me, but after subsequent correspondence, Jousseaume stated that he 

 found the characters I had observed, also on the upper whorls of his shell. The "Siboga"- 

 specimen is very light brownish, not purple-brown, with only 6 whorls instead of 7, the upper 

 whorls are smooth, then follows the last whorl with scarcely 2 rows of granules, instead of 

 7 or 8, towards the keel it has very irregular radiating ribs, which leave however a nearly 

 smooth zone above the keel, with only a few spiral striae; the base is less convex than the 

 upper part, I find no rose-coloured line round the umbilical callosity. The diameter, without the 

 spines, is 29 Mill., the altitude 17 Mill. As the shell from Stat. 251, with a diameter of 32 Mill., 

 has already 6 rows of granules near the aperture, and the other characters agree, I can, after 

 the assertions of Jousseaume, find no reason to describe a new species. Only by direct comparison, 

 it would be possible to find more characters, which could justify a new species. The operculum 

 in the two living specimens is oval, thick, with the nucleus in the external lower corner; the 

 outer surface is slightly rugose, by irregular wrinkles, almost parallel with the basal margin of 

 the operculum. The nucleus is marked by an olive spot. 



Astralium Link. 

 I. Astralium (Psezidastralmm) abyssorum n. sp. PL II, fig. i. 



Stat. 12. 7°r5'S., iiS°is'.6E. 289 M. Mud and broken shells. 4 Spec. 



Stat. 59. Western entrance Samau-strait. 390 M. Coarse coralsand. i Spec. 



Stat. 89. Pulu Kaniungan Ketjil. Shore. l Spec. '). 



Stat. 139. o°ii'S., 1 27° 25' E. 397 M. Mud, stones and coral, i Spec. 



Stat. 156. o°29'.2S., I30°5'.3E. 469 M. Coarse sand. 4 Spec. 



Stat. 159. o°59'.iS., I29°48'.8E. 411 M. Coarse sand. 4 Spec. 



Stat. 279. io°39'S., I23°40'E. 520 M. Mud and sand, i Spec. 



Shell trochiform, flattened below, imperforate (except in a very young specimen) whorls 7, 

 the upper ones with flattened sides, the last slightly convex; the sculpture of the upper whorls, 

 consists of a row of small, close-set beads at the suture, being foldlike in the second whorl, 

 they become larger, round and more remote on the next whorls, where they form the only 

 sculpture, till on the ultimate or penultimate whorl, spiral rows of scales make their appearance, 

 beginning with are single row, above the lower suture, they reach the number of 9 on the last 

 whorl, near the aperture. Of these rows, eight are complete, while the lowest one is interrupted 

 by the spines, which are present on all the whorls, except the embryonic one. These spines 

 amount to 14 on the last whorl: they vary in length, are depressed, and provided on the 

 upper surface, with radiating lirae. The beads of the upper whorls persist on the last one, where 

 they number 20 or more. The sutures are deep, channelled, bordered above by the spiniferous 



l)'This locality is most probably a lapsus calami fov Stat. 98. e^g'N., i2o''2i'E. 350 M. Sand. 



27 



