448 THE AMERICAN NATURALIST. [Vou. XXXIII. 
The specimens of Mermis in the Kgl. Museum fiir Naturkunde in 
Berlin have recently been studied by von Linstow (Arch. mikr. Anat., 
Vol. LIII, pp. 149-168), who gives an extended taxonomic account of 
the genus, followed by a discussion of anatomical and histological 
features. In the last three lines of the paper and all too easily over- 
looked comes the establishment of a new genus for those species, 
M. crassa and M. aguatilis, which are characterized by the possession 
of only a single spicule. 
Dr. Saint-Remy has added a complement to his valuable synopsis 
of the monogenetic Trematods (Arch. Parasitol., Vol. I, No. 4, pp. 
521-571). The present paper is a revision of the synopsis, including 
all new matter since 1891, and is a most welcome contribution to our 
knowledge of this important group of parasitic worms. Forty-nine 
species have been added and a new key prepared. 
Indo-Malayan Landplanarians are brought together in a synoptical 
table or key for easy determination by von Graff (Ann. Jardin Bot. 
Buitenzorg, Supp. Il, pp. 113-127). About 35 per cent of all known 
species are found in this region. 
Dr. N. A. Cobb has added another to his series of studies on the 
free-living Nematoda (Proc. Linn. Soc. N. S. W., Vol. XXIII, No. 91, 
pp. 383-407), adding seventeen new species to the worm fauna of 
Australia. All of the forms are from Port Jackson. 
The Leeches of the U. S. National Museum have been studied by 
J. Percy Moore (Proc. U. S: Nat. Mus, Vol. XXI, pp. 545-563), 
and of the small national collection, consisting of species from all 
parts, six are described as new. 
Hypodermic Impregnation has been observed by Dr. E. G. Gardiner 
in the acoelous turbellarian Polycherus caudatus (Journ. Morph., Vol. 
XV, No. 1), thus adding another to the list of forms in which im- 
pregnation of this sort occurs. 
The Earthworms of Japan are being studied by S. Goto and S. 
Hatai, the first of a series of papers being devoted to seventeen spe- 
cies of Perichæta (Annot. Zool. Japon., Vol. II, No. 3). 
Dr. R. S. Bergh in Fauna Chilensis reports upon the opisthobran- 
chiate mollusca collected by Dr. Plate on the western coast of South 
America. A number of forms described fifty years ago by D’Orbigny 
from this locality are again brought to light, together with twelve new 
species. 
