13 S BUCCINID^. 



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. pygmseus. The epidermis is, 

 however, no more velvety than in some other species, and the 

 description of the dentition given by Yerrill applies very well 

 to that of Sipho Islandicus. 



siPHONORBis, Morch. Apex depressed, embryonic whorls grad- 

 ually diminishing, angigyrous. In the true Siphos the apex is 

 mamillary. S. ebur, Morch. 



MOHNIA, Friele. Operculum paucispiral. M. Mohnii, Friele 

 (xlix, 11, 12). 



SiPHONALiA, 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, shovildered, 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 thanNeptunea : which, nevertheless, 

 it approaches very nearly in the form and color of S. Kellettii, 

 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, Kobclt. Shell ovate-fusiform, whorls rounded, 

 not angulated at the upper part. 8. alternata, Phil, (xlix, 15). 



FuLGUR, Montfort. 



Syn. — Busy con, 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. 



