THE MOLLUSCAN FAUNA OF TASMANTA. 51 
Family, Turrrrenim. 
Animal: Rostrum short, broad, tentacles long, fine, eyes at base. 
Mantle with a fringed margin obscur ely siphonated at right side. 
Operculum horny. ‘0 ontophore very short, 3-1-3, median square, 
laterals ligulate, summits hooked, serrulate. Shell rreted, 
subulate many-whorled imperforate, spirally grooved, aperture 
entire, outer lip acute. 
Turritella 5. Siliguaiia® 2. Vermetus is also placed in a different 
family. We have two of the former and one of the latter, or 
perhaps two. Both are abnormal mollusca—the latter fixed, 
and with the foot rudimentary. Lingual dentition unknown. 
Family, CanyrTrmIp&. 
Animal dilated and depressed on its sides, tentacles medium, 
eyes at “ine external base, foot large, no operculum. onto- 
phore winged on each side i in front, 3-1-3, central small, beosd, 
subspiral, interior simple o or with a diaphragm. The egg-c cases 
in this family are membranaceous in a tuft in front of foot, under 
the neck. Trochita 1, Concholepas ~ Crepidula 1 or 2. 
It is doubtful whether some of the species ranged under the 
above genera aa pss be A oa in others. In the family 
Pileopside they are not ut from the animals. Amalthea, of 
which we have probably two species, is referred to the latter 
family, which generally Scieeaurceie to Adam’s Capulide. The 
animals hardly differ in either. 
2np OrpER, ScUTIBRANCHIATA. 
Hermaphrodite molluses, with a double branchial plume in 
wy neck, or in cirrhi round the 
. Sub- order, Podophthalma—eyes pedunculate. 
Family, Nerrrip2. 
nimal : Muzzle broad, short, tentacles slender, eyes on stout 
setae at outer base, no head lobes or neck ppets, foot 
oblong, triangular, no filaments, operculum shelly, articulated, 
subspiral, opereulum m central, teeth 5-1-5, with a long com 
numerous Ara ge Shell depressed, oval, spire short, no 
sbilicun 'N, al. 
Family, Trocnrp2. 
meee Head probosecidiform, tentacles fine, ‘het cilia, 
eyes on free peduncles at their outer base, head lobes between 
eticton of gill single, long, neck lappet at sides of foot near fil 
e, continucus with a side membrane with 3 to 5 
i on her i aa oes lobe o: 
opereulum horny, s often caleareous. Odontophore 
Tike Neritid. Shell Saeed turbinate, or ear-shaped, nit, 
“ : ¥ i, 
