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ON THE ANATOMY OF TWO LAND MOLLUSCS (HELICARION (?) 
WILLEYANA AND 4H. (?) WOODWARDI, n.sprr.) FROM NEW 
BRITAIN AND LIFU, LOYALTY ISLANDS, COLLECTED BY 
DR. ARTHUR WILLEY, F.R.S., IN 1895-97. 
By Lieut.-Colonel H. H. Gopwry-Avstey, F.R.S., ete. 
Read 13th June, 1902. 
PLATE IX. 
Tur two species which I describe in this paper were entrusted to 
me with several others by our late lamented Secretary, Martin F. 
Woodward, saying he thought they would interest me. It was the 
last time I saw him, and it has naturally been a matter of deep 
regret to me, throughout the time devoted to these shells, that, with 
other members of this Society especially, I can never receive again 
his real, sympathetic and valuable aid in work of this nature. Of the 
remaining species, which are all small forms, I hope to communicate 
descriptions later on. 
Those who have worked at these small glassy shells know how 
extremely difficult it is to determine their species: the question of 
their generic position is in many cases even more difficult—I may say 
impossible—to solve from the shell characters alone. The animals, 
however, when well preserved—and Dr. Willey’s specimens were— 
present in many points of their anatomy characters which are distinct 
enough to render determination quite easy, and this is well shown on 
a comparison of the soft parts of the two animals now described. 
Generic determination, as in this case, will not become easier until 
more is known of the animals of the various genera and subgenera 
living in the part of the world from which these species come. So 
many species are only partly known, often owing to the paucity and 
bad preservation of material; sometimes only the shell and radula 
have been described. For this reason I have placed both Dr. Willey’s 
species in Helicarion, a genus which already contains a very varied 
lot of animals. I consider we have not yet arrived at the stage 
when subgeneric divisions can be made with satisfactory results, and 
while so much new and fresh material has yet to be collected in the 
many thousand islands of the Malay Archipelago and Pacific Ocean. 
1. Hezicarron (?) WILLEYANA, D.sp. 
Hab.—Gazelle Peninsula, New Britain (Dr. A. Willey). 
The shell, which has five whorls, is quite smooth. The animal 
(Figs. 1, 1a, 16) has an extremely long foot, with a well-developed, 
overhanging lobe above the mucous gland; it is rounded above, with 
