66 THE AMERICAN NATURALIST. |. [Vor. XXXV. 
A new genus of ectoparasitic trematode, Aporocotyle simplex, has been 
discovered by Odhner (Centralb. Baki. u. Par., x. Abt., Bd. XXVII, 
p. 62) on the gills of Pleuronectes. It stands in sharp contrast with 
all forms of the group hitherto described, in that it lacks entirely 
the suckers and all other specialized apparatus for attachment so 
characteristic of the group. 
The endoparasitic trematodes of Chelonia are treated by Braun 
in two articles (Centralb. Bakt. u. Par., x. Abt., Bd. XXV, p. 714, and 
Bd. XXVI, p. 627). A considerable number of species, both old 
and new, are carefully described. Among the latter is an American 
form, Jonostoma renicapitate, which has not been noted since the 
original scanty description of Leidy. 
The species of Filaria found in human blood are discussed by 
Von Linstow (Zool. Anz., Bd. XXIII, p. 76). The characteristics 
of each supposed species are given in full, with citations from some 
rather inaccessible authorities. The distribution of each is also 
considered. 
Mr. Willis S. Blatchley's Twenty-fourth Report of the Geological 
Survey of Indiana contains, besides important geological and mining 
matter, a number of valuable papers on the local natural history. 
E. B. Williamson contributes a descriptive catalogue of the Dragon- 
flies; R. E. Call, an illustrated catalogue of the Mollusca, and 
Stanley Coulter a catalogue of flowering plants and ferns. Mr. 
Blatchley continues his -useful notes on the reptiles and batrachians 
of Vigo County. 
BOTANY. 
Two Recent Mushroom Books. — The last half decade has been 
` notable for the number of new mushroom books and papers, and 
even more for the increase in fungus-eating in this country. Up to 
the time that the late Mr. Gibson turned his happy faculty of pen 
and pencil to the subject, most people had held a vague but fixed 
idea that none but the expert mycologist could turn mycophagist at 
large without the probability being great that his friends would ulti- 
mately record in sadness the final result of some last experimental 
eating of a species “ supposed to be" wholesome, — only Morels 
"the" Mushroom, and a few others grossly marked being safe ot 
the layman's consumption. By his clear descriptions and exquisite 
