138 BUCCINID A. 
Mr. Gwyn Jeffreys thus describes the egg-capsules of S. gra- 
cilis, DaCosta : 
“The capsules are solitary, small, membranous, pouch-shaped , 
and attached by a broad base to stones and corallines; their 
surface is microscopically and closely reticulated ; orifice 
extremely large and sometimes having the edge partly stained 
with pink. Each capsule contains only a single embryonic shell, 
which is transparent, and through it may be seen the orange 
liver and two unequal-sized plumes of pale yellow gills.” 
NEPTUNELLA, Verrill. Founded on the peculiarly velvety epi- 
dermis and the dentition of S. pygmxus. The epidermis is, 
however, no more velvety than in some other species, and the 
description of the dentition given by Verrill applies very well 
to that of Sipho Islandicus. 
SIPHONORBIS, Mérch. Apex depressed, embryonie whorls grad- 
ually diminishing, angigyrous. In the true Siphos the apex is 
mamillary. S. ebur, Morch. 
MOHNIA, Friele. Operculum paucispiral. MM. Mohnii, Friele 
(xlix, 11,12). 
SipHonaria, A. Adams. 
Distr.—25 sp. Japan, California, Australia, N. Zealand. S. 
Tasmaniensis, Angas (xlix, 13. S. nodosa, Mart. (xlix, 14). 
Shell ovately fusiform, sometimes variegated in coloring, 
rather thin, epidermis very thin, fugaceous; last whorl ventri- 
cose, shouldered, usually nodosely plicate and spirally ribbed ; 
aperture oval, outer lip thin, columella smooth; canal rather 
short, twisted. Operculum ovate, nucleus apical. Dentition 
unknown. 
This genus is principally of tropical and subtropical distribu- 
tion,and more highly colored than Neptunea: which, nevertheless, 
it approaches very nearly in the form and color of S. Kellettiz, 
for instance. The metropolis of the genus is Japan, a few 
forms being found, however, on the opposite shores of the West 
Coast of North America ; some species occur also in Australian 
waters. The shells are usually thin and ventricose, variegated 
in color and destitute of epidermis. The operculum is fusoid. 
AUSTROFUSUS, Kobelt. Shell ovate-fusiform, whorls rounded, 
not angulated at the upper part. S. alternata, Phil. (xlix, 15). 
FuLaur, Montfort. 
Syn.—Busycon, Bolt. 
Distr.—5 sp. Atlantic Coast of United States. F. carica, 
Gmel. (xlix, 16). Fossil. Tertiary; Eastern U.S. 
Pear-shaped, thin; spire short, the angle of the shoulder 
spinous ; body-whorl very large, attenuated below into a rather 
long twisted canal; lip and columella smooth, the latter with a 
single, rather obsolete fold. Operculum ovate, nucleus apical. 
