492 Miscellaneous. 



was apparent. The embryo is cylindrical, with the caudal extremity 

 suddenly terminating in a point ; its length is £ millim. : its mouth 

 does not show the three tubercles characteristic of the Ascarides. 

 From the 7th of May to the 21st of June the embryos had continued 

 living within the shell of the egg, and none of them had escaped. 



The author placed the ova in the gastric juice of the rabbit and 

 dog ; but after staying in these fluids for three or four days, the shell 

 remained perfectly intact. M. Richter, who placed the ova of this 

 worm in water, found, after the lapse of eleven months, that they 

 contained embryos ; but he was unable to see them hatch. 



The ova, like those of the Trichocephalus, are evacuated with the 

 faeces ; and before their evacuation they never show the least trace 

 of development. In October last, ova kept for a fortnight at a nearly 

 constant temperature of 86° F., acquired no development. The same 

 ova, left in a room in which the temperature never exceeded 61°F., 

 underwent segmentation in April. Ova collected in January under- 

 went segmentation in June ; whilst others collected in April presented 

 no trace of development in June, notwithstanding the great heat of 

 the season. Temperature therefore would seem to have little or no 

 influence on the ova of Ascaris lumbricoides, which require to remain 

 for a long time in a state of latent life. 



Hence the author concludes — 1. That the ova of these worms are 

 developed out of the human body ; and 2, That the appearance of 

 the embryo does not take place until after the lapse of eight months 

 in the one case and six months in the other. In this long interval, 

 the ova may be transported by rains into brooks, livers, and wells, 

 the water of which is used for drinking and preparing food. In this 

 way the fully-developed ova or the embryos may find their way into 

 the human intestine. — Comptes Rendus, June 21, 1858, p. 1217- 



Note on Enteromorpha cornucopise. 

 By Dr. J. E. Gray, F.R.S. &c. 



Professor Harvey admits this species with doubt, on the authority 

 of the late Capt. Carmichael (Phytologia Brit. t. 304) ; but I think 

 there can be no doubt that Lyngbye and Agardh are correct in re- 

 garding it as a variety of Enteromorpha intestinalis, or rather, a form 

 of that species produced by the peculiar position in which it is found. 



It is very abundant in one locality in Broadhaven, in St. Bride's 

 Bay, South Wales, growing where some fresh water trickles down 

 the side of a nearly perpendicular rock. The whole width of the 

 trickle is covered with the green Alga as close as it can grow, side 

 by side. The plants on the top of the higher and nearly horizontal 

 ridges, which the water only trickles over, are all the bell-shaped 

 E. cornucopia, f. 3, and the specimens on the perpendicular parts are 

 the oblong tubular specimens of that plant, like f. 2 of Dr. Harvey's 

 plate above quoted, while the specimens growing in the pools left in 

 the small cavities of the rock are all more or less elongate normal 

 Enteromorpha intestinalis. 



The hell-shaped foim in some instances appears to be produced by 

 the withering-away of the upper part of the oblong specimens ; in 



