16 
as “minute, rather tilted, unsculptured, of a whorl and a half”. In 
the present specimens the apex has a finely reticulated sculpture 
consisting of fine elevated lines surrounding small oval depressions. 
This sculpture of the protoconch seems to be common in the genus 
Calliostoma though generally obliterated by wearing. I have ob- 
served it in C. pellucidum, the new C. onusium, and in the European 
C. conulus, and Suter mentions it in C. tigris. It will certainly 
prove to be a chåracteristic feature of the genus. 
Calliostoma onustum n. sp. 
(PI. I, fig. 4.) 
Shell small, conic-elongate, solid, imperforate, white and nac- 
reous. Whorls 7 1/2, flattened, separated by a shallow suture, the 
2 first papillate, spirally lirate and with traces of reticulated sculp¬ 
ture as in C. trepidum (cf. above), the subsequent ones with about 
5 spiral keels and longitudinal costae (18 in the last and the 
penultimate whorl), nodose in the points of intersection, the nodules 
most prominent in the 2 lowest lirae of the whorls. Last whorl 
angulated at the periphery;* below the 5th spiral lira there are 
2 thinner ones at the angle; they are limited on the base by 
a broad furrow; base flattened, carrying 6 or 7 coarse lirae, the 
outermost one almost smooth, bipartite all along, the remaining 
ones regularly granose. Aperture subquadrate, white and nacreous 
within; lower lip subcrenate, outer lip simple, columella straight, 
rounded below, forming a nearly right angle with the parietal wall, 
which does not show any trace of a callous covering. Dimensions: 
H. 6.6, br. 4 mm. — Locality: North Island: 2, 2 shells, the larger 
one with a Pagurid. The second, small specimen has a broader 
conic shape and 8 basal spiral cords. The reticulation of its pro¬ 
toconch is very distinet. 
Euchelus bellus Hu tt on. 
North Island: 7, 1 sp., h. 6. — Ild, 2 sps., h. 6.7. — 14, 2 
sps., h. 6. 
