DESCRIPTIONS OF NEW GENERA AND SPECIES 
OF AUSTRALIAN MOLLUSCA (CHIEFLY 
TASMANIAN).* 
By PnorrssoR RALPH Tate and W. L. Mar. 
[Read October 2, 1900.] 
Lampusia nodocostata, spec. nov. 
Shell fusiform, rather slender, light-brown. Whorls ign 
suggestive of a styliform proto-conch similar to that of Z. exarata, 
but on a larger scale. 
Costze subacute, with about three nodulations on the anterior 
half; six intervariceal coste. Mg similar to the costs, 
except that they are stouter ; seven in 
The spiral ornament consists of ee threads, Meg 
obscurely granulated ; 24 on the penultimate whorl, which 
three on the anterior ied i the whorl are broader, and bili 
the nodulations on the c 
Last whorl about merine the total length of the shell. The 
costæ are extended to the base, and the nodulation is continued 
below the periphery, corresponding with the intercrossing of six 
broader spiral threads, which are regularly disposed ; the inter- 
stitial spaces between the broader threads are occupied by about 
eight smaller spiral threads. 
Aperture quadrately oval ; beak short, considerably upturned. 
The columella is smooth, and ber outer lip is not dentate (the 
shell is probably not full grow 
Length, 31; breadth, 16; length of aperture and canal, 17 mm. 
Ma 
East Coast, Tasmania l wó examples ( ay ). 
This species appears from the in i ‘and figures of T'riton 
tenuiliratus, Lischke, Japan Meer-Conch, to be closely related 
thereto; but differs by details of M. T. granulatus, 
n to 
*It is antieipated that figures of the new species and — unfigured 
Tasmanian species will be published early next year b e Linnean 
Society of New Sout les, to e md paper ied ^ Re ised 
— of the Marine Moll ^ dmt wu: as time does not permit of 
