THE NAUTILUS. 81 
people they are called “sand dollars.” I was greatly puzzled over 
them till this summer when I learned, at the Conchology Class of 
the Chautanqua Assembly what they were. They arethe egg cases 
of the Natica and are full of microscopic eggs mixed with the sand. 
Sometimes on top of the egg cases are found the eggs of the Nassa 
lying in long rows. 
NOTICES OF NEW PUBLICATIONS. 
ON THE STRUCTURE AND AFFINITIES OF SOME NEW SPECIES OF 
Mo .uuscs FROM Borneo.—By W. E. Collinge and H. H. Godwin- 
Austen, P. Z. S., 1895.—This interesting paper gives descriptions 
and many figures of three new slugs collected by Mr.. Everett in 
Borneo. The fact is brought out, that the slugs of Borneo resem- 
ble in their anatomy some of the shell-bearing forms of that island, 
rather than the Indian slugs to which they show more outward 
similarity. The first species is placed in Damayantia Issel, for all 
that it hasa shell. The suggestion that Issel was mistaken in sup- 
posing that his genus was shell-less is probably correct ; the present 
writer had in Ann. Mag. N.H., Jan., 1891, p. 100, suggested a doubt 
as to the validity of this character by quoting it within inverted 
commas. Some remarks are given as to Tennentia, which is said to 
be “ probably synonymous with Issel’s genus,” but immediately be- 
low is correctly shown to be equivalent to Mariaella. It is probable 
that the authors meant to say that the so-called Tennentia philip- 
pinensis is a Damayantia, but not that Tennentia= Mariaella is Dam- 
ayantia! If the latter synonymy held, Mariaedla would of course be 
the name of the genus, having long priority. The statement that 
Dekhania G.-A. is the same as Mariaella and “ must be suppressed ” 
comes rather late in the day, since the present writer had suppressed 
it, with all due pomp and solemnity, in 1891 (t. c., p. 103-104), 
and again in the check-list of 1893. The other two species are 
placed in Microparmarion, a genus or subgenus lately instituted by 
Simroth for a species from Java. Curiously, in making comparisons, 
Africarion pallens is said to be from South India, whereas it was really 
from Abyssinia, vide Godwin-Austen, Moll. of India, 1883. 
Simroth’s division of the Javan slugs into Parmarion and Micro- 
parmarion may be justified, but a new name is apparently required 
