SCOLECIDA. 
743 
Mecznikow, E. Ucbcr die Eiitwickelung von Ascaris mgro- 
venosa. lleicliert ii. Dii Bois-Reymoiid^s Arcliiv, 1865, 
pp. 409-420, pi. X. 
From these observations it would appear that in A, nigrove- 
nosa the embryos attain sexTial maturity while they have all 
the appearance of worms belonging to the genus RhabditiSf that 
while living in this stage they feed and grow as if they had to 
carry on a free existence throughout their lives; but their pro- 
geny becomes truly parasitic, and both these forms are sexually 
developed. Both spring from ova. 
. Zur Naturgeschichte der Rhabdocoelen. Arch, fur Na- 
turgesch. 1865, pp. 174-181, taf. iv. 
McIntosh, W. C. On a Trematode Larva and on a Ascaris of 
the Car emus mmnas. Quart. Journ. Micr. Science, July 
1865, p. 201, with a plate. 
Pagensteciier, II. A. Die Trichinen, mit lliicksicht auf den 
jetzigen Standpunkt der Parasitenlehre. Der Zoologische 
Garten, 1864, pp. 33-39, 64-74, 96-108. 
. Ueber das Vorkommen von Trichina beim Igel. 
Verhand. nat.-hist.-med. Ver. Heidelberg, Bd. iv. p.ll. 
. Ueber Trichinen und Psorospermien beim Masken- 
schweine. L. c. pp. 20-22. 
Rindfleisch, E. Zur Histologic der Cestoden. Archiv fiir mi- 
kroscop. Anat. 1865, 1. Band, pp. 138-142, Taf. vii. 
Stieda, L. Ein Beitrag zur Anatomic des Bothriocephalus 
latus, Reichert u. Du Bois-Reymond^s Archiv, July 1864, 
pp. 174^212, with two plates. Noticed in Quart. Journ. 
Micr. Science, January 1865, p. 53; Ann. Sci. Natur. 
5® ser. Zoologie, t. iii. 1865, pp. 93-126. 
Entozoa in Museums. Dr. Oobbold (Lancet, May 13, 18G5, p. 603) gives 
a brief record of no less than 632 preparations of Entozoa examined by himself 
contained in ten different museums and representing 377 human cases, of 
which latter 199 were referable to the Echinococcus or hydatid disease. 
Dr. Cobbold states what is known respecting the source of all the species 
of Entozoa liable to infest the human body in Brit. Assoc. Report, 1864, 
pp. 119 & 120 ; Pop. Science Rev. 1866, pp. 163-170 ; and in Journ. Bath 
Soc. of Agricul. 1865, pp. 149-166. 
Nematoidea. 
Davaine (1. c.) notices the opinions that were held on the subject of the 
production of the Vinegar-Eels by Buffon, Dujardin, and others, and then 
proceeds to lay the results of his own investigations, carried on for more than 
ten years, before the reader. Wine-vinegar, no matter how long it may be 
exposed to the air, will not produce them ; nor will vinegar poured over 
paste produce them, if they were not previously in the vinegar. Acidity 
