400 SUMMARY OF CURRENT RESEARCHES RELATING TO 
fish Tremoctopus microstoma Reynaud, he satisfied himself that the 
animal had simply appropriated the tentacle of a Medusa. 
Mollusca. 
Deep-Water Mollusca.* — Dr. W. H. Dali has a report on the 
Mollusca dredged in deep water chiefly near the Hawaiian Islands. He 
says that the material obtained is not only very interesting zoologically, 
but wholly new. In his description of Spergo glandiniformis he is able 
to give details as to the structure of the animal. There is an immense 
crop, which, from the deep longitudinal wrinkles of its surface, is evidently 
capable of being distended. It has a smooth, rather tough lining, without 
any horny appendages. The teeth are set regularly in a single row on 
each side of a strip of rather horny consistency. The width of the radula 
from base to base is 1/125 in. The length of the developed radula is 
about 1/20 in. This, for a creature over 4 in. long when extended, 
seems very minute. 
The opportunity of studying a new species of Euciroa enabled the 
author to complete his description of the group, and establish its generic 
distinctness ; the gills in particular appear to be specially peculiar, 
bridging in some degree the transition between two other types of 
gill-structure. 
The anatomical details given in this memoir make it a very im- 
portant contribution to our knowledge of the Mollusca. 
Mollusca of Austrian Deep-Sea Expeditions, 1890-94.f — Dr. R. 
Sturany finds that the uniformity of the Molluscous fauna of the greater 
depths of the Mediterranean is proved afresh by the dredgings of the 
‘ Pola.* An Atlantic origin has very rightly been ascribed to the deep- 
sea fauna of the Mediterranean. The deeper parts of the eastern 
Mediterranean appear to be poorer in shells than the similar parts of 
the western basin. On the whole, nine new species were discovered, 
and nine already long known are new to the fauna of the Adriatic. 
Mollusca of Central Australia.^ — Prof. R. Tate has a report on the 
Mollusca collected during the Horn Scientific Expedition to Central 
Australia. Before the advent of this expedition, the published informa- 
tion concerning the land shells of the region investigated was restricted 
to three species. We know now that^tliat portion of Central Australia, 
which Prof. Tate has named Larapintine, has 25, four of them extend- 
ing beyond the area, while five others are more or less allied to forms 
living beyond its limits. The remaining 16 offer such distinctive 
characters that they must be regarded as restrictively endemic. The 
fauna approximates in character more to that of subtropical and tem- 
perate West Australia than to any other part of the Continent, and is in 
strong contrast with that of tropical and subtropical regions to which 
it is geographically equally near. The limited number of genera repre- 
sented, together with the facts of their geographical distribution, would 
* Proc. U.S. Mus., xvii. (1895) pp. 675-713. * 
1 1 SB. K. Akad. Wiss. Wien, 1896, pp. 56-9. See Ann. and Mag. Nat. Hist., xvii. 
(1896) pp. 469-70. 
X Horn Scientific Expedition to Central Australia, pt. ii. (1896) pp. 181-219 
(3 pis.). 
