go General Notes. [April 
and species of North American Fresh-Water Polyzoa, illustrated 
by a plate of figures copied from various sources. 
In the same publication. Dr. T. O. Stevens gives a key to the 
gefiera and species of Rotifers recently described in the extensive 
monograph by Hudson an osse. In this connection it may 
be noted that no sooner is this large work completed than Mr. 
P. H. Gosse, one of the authors, describes (¥ournal Royal Micros. 
Society, February, 1887) twenty-four new species of Rotifera, 
illustrating them by two plates, 
At the Linnzan Society Mr. S. O. Ridley recently described 
Lophopus lendenfeldi, from near Sydney, N.S. W. This is the 
fourth species of fresh-water polyzoon on record from Australia. 
installment of Herman Frieles’s account of the Mollusca. It 
deals with the Pleurotomide, Cancellaridz, and Brachiopods, and 
is illustrated by six plates. The work will prove invaluable to 
systematic students of the molluscan fauna of the North Atlantic. 
Vol. xv. of the “Challenger” Reports is largely taken up 
with the Rev. R. Boog Watson’s report on the Scaphopoda and 
Gasteropoda. About thirteen hundred species were collected. 
The Chitons collected by the “ Challenger” were few. The 
really deep-sea forms belong to Leptochiton, of which four 
species were found, two of them new. These were taken at 
species added, the largest, C. magna, eleven hundred and fifty- 
five millimetres long. Inthe new genus Amphitretus the mantle 
is fused with the siphon in the median line, so that there are two 
Openings into the branchial sac. A. pelagicus was taken near 
Kermadec Islands. Twenty kinds of Octopus were found, 
_ eleven of which are described as new. Ten new species are 
added to Sepia, and specific characters are found in the shell or . 
sepiostaire. Two species of Taonius were found. T. suhmi was 
taken for a Clionid Pteropod by Willemoes-Suhm, and described 
as a new genus of Cephalopoda by Lankester. 
__ The Marseniade are a family the types of which were the 
Helix perspicua of Linnzus and the Bulla latens of Müller. The 
occur in all seas, and have the shell either altogether 
~ enveloped in the mantle or very partially exposed.. Six genera 
and thirty-three species are recognized in vol. xv. of the “ Chal- 
