232 MR. A. ADAMS ON JAPANESE OBELISCINZ. [Nov. 1], 
floor of sand or sandy mud; they are very difficult to obtain alive, 
the shells forming the subject of this paper having been obtained, 
for the most part, from an examination of shell-sand. The animal 
of Syrnola cinctella crawls rapidly. It is of a semipellucid white, 
with the upper surface of the mentum flecked with opake white; the 
tentacles are broad and triangular, with the eyes between them very 
close together; the mentum is greatly elongate, and bilobed at the 
end; and the foot is narrow. This species lives in two fathoms’ 
sandy mud at Takano-Sima, a small island on the east coast of Japan. 
Genus Osexiscus, Montf, 
1. Opretiscus putcHeLtus, A. Ad., Sow. Thes. Mon. Obel. 
pl. 171. fig. 20. 
Hab. O-Sima; Yobuko; Mososeki. 
2. Opexiscus TeREs, A. Ad., Sow. Thes. Mon. Obel. pl. 171. 
figs. 31, 32. 
Hab. Mino-Sima. 
3, Oxsrtiscus BALTEATUS, A. Ad., Sow. Thes. Mon. Obel. 
pl. 71s fig 25, 
Hab. Yobuko; Uraga. 
4. Oze.iscus pusituus, A. Ad., Sow. Thes. Mon. Obel. pl. 171. 
fig. 7. 
Hab. O-Sima; Takano-Sima. 
5. OBreiscus nitrpuuus, A. Ad. 
Syrnola nitidula, A. Ad., Ann. Nat. Hist. 1860, vi. 335. 
Hab. Mino-Sima, 63 fathoms; O-Sima, 25 fathoms. 
6. OBeLiscus vitrevs, A. Ad. 
Syrnola vitrea, A. Ad., Annals, 1860, vi. 335. 
Hab. Uraga; Tsu-Sima. 
7. OsEexiscus TRIFAscraTus, A. Ad. 
O. testa acuminato-conoidea, cornea, tenur, semipellucida, vitrea ; 
anfractibus normalibus 7, planiusculis, fasctis tribus rufis trans- 
versts ornatis, suluris exaratis, apertura ovata; plica suprema 
valida transversa, plica inferiore parva inconspicua ; labro in- 
tus lirato. 
Hab. Uraga; Mososeki. 
This species resembles O. xitiduluvs in form; but the whorls, in 
all my specimens, are adorned with three transverse bands. 
8. OsrLiscus EBURNEUS, A. Ad. 
O. testa subulato-aciculata, elurnea, solida, opaca, levi; anfrac- 
tibus normalibus circa 10, planulatis, sulcis longitudinalibus hic 
