109 
fascia, and with fine spiral threads, more or less squamose by 
intersection with the growth strizw, above and below the fascia. 
Body-whorl flatly convex, somewhat abruptly contracted into 
a moderately short, wide, shortly upturned canal. The fascia is 
1:5 mm. wide, and is post-peripheral, but widely separated from 
the suture ; the post-fascial area is nearly smooth, the spiral and 
axial ornament of the earlier whorls being almost obliterated ; 
the anteperipheral area is furnished with about five stout sub- 
acute spiral ribs, the interspaces spirally lined ; the same kind of 
ornament, with weaker spiral ribs, but with more pronounced 
squamose spiral striz, is continued on to the base and snout. 
Aperture narrowly pyriform, outer lip thin, sinus apparently 
broad and short. 
The species would appear to be common at both localities. 
Dimensions.—Length, 38:5 mm.; width, 16 mm.; length o 
aperture, 24°5 mm.; and width, 6 mm. 
The species-name is a compliment to Mr. Joseph Vardon, J.P., 
whose invaluable aid to the Council in his capacity of printer of 
the Transactions since 1879, is hereby personally acknowledged 
by me. 
Remarks.—Among described species of the Australian Ter- 
riaries, this new form makes a near approach to P. paracantha, 
Ten.-Woods, from which it differs by more conoidal shape, the 
absence of tubercles on the keel, and by having strong spiral ribs 
on the body-whorl. I consider the two species to be congeneric ; 
they both have the aspect of Bathytoma—indeed, I had referred 
last year* P. paracantha to Bathytoma—but the columella-plica- 
tion is not developed, though there is a faint twist of the pillar. 
Whatever may be more correct generic location, there is no 
doubt that these two species abbreviate the differences which 
separate the one genus from the other. 
Cerithium Torrii, spec. nov. Plate i., fig. 2. 
Shell cylindroid-turreted, fully five times as long as wide. 
Whorls flat, slightly imbricatirg at the suture, ornamented by 
stout, subactue, subflexuose axial ribs about twenty-four on each 
of the six anterior whorls; the ribs are interrupted at about one- 
fifth the breadth of the whorl from the posterior suture by a 
linear series of contusions in the interspaces, and the more 
anterior whorls are crossed by two or three slightly elevated 
spiral threads, which are feebly tuberculated at the intercrossing 
with the axial coste. The whole surface of each whorl is closely 
and minutely reticulate-lined. 
Dimensions.—The two examples under observation are imper- 
fect, both are wanting the apical part of the spire and the body 
* Proc. Roy. Soc., N.S.W., p. 398. 
