192 MICROSCOPICAL MEMORANDA. 



the bulb of the hair, and projected from one side ; its form resembled 

 that of the calyptra or cup of a moss there was a decided opening at 

 the apex, which was furnished with a well denned rim or margin ; the 

 orifice was filled with a number of small oval or roundish particles 

 resembling eggs these were piled one above the other in a conical 

 manner. The whole interior appeared filled with similar bodies, which 

 were easily recognisable through the diaphanous parietes of the recep- 

 tacle. The nest, should such it be, was attached by means of a pro- 

 longation of its lower part, which encircled the hair, much in the same 

 manner as wasps and some birds fix their nests to the branches of trees. 

 Its size as far as could be judged was about -g^th of an inch long, by 

 about a-^th f an i ncn broad. A sketch of this object will be found in 

 a future plate of this Journal. Daniel Cooper, Fort Pitt, Chatham, 

 July 13, 1842. 



[PL VI, Fig. 1, a. The conical pile of eggs protruded from the marginal opening. 

 b. The body of the nest, with the contained ova seen through the walls, c. The 

 appendage by which the nest was fixed to the hair. d. The bulb or root of the 

 hair.] 



Appendix to Mohrs paper on the Panctated Vessels of Plants. The 

 references to the Figures in Plate V, having been omitted in their pro- 

 per place, p. 146, they are here inserted : 



Explanation of Plate V, Div. 4. 



Fig. a. Walls of a Punctated Vessel contiguous to cells in Chilianthus arboreus. 

 Fig. b. Ditto, contiguous to another Vessel the pu notations are broadly ex- 

 tended and simulate a scalariform duct. 



Fig. c. Longitudinal section of walls of two contiguous Vessels in same plant. 



Erratum. At page 99, for Plate IV, Div. 2 & 3, read Plate V, Div. 

 2 & 3. We would recommend our subscribers to make this and other 

 alterations with the pen, in order to save confusion. 



Erratum. At page 131, in the references to Plate III, for Div. 6, 

 read Div. 5, and in the place of what is there printed, read, a. Nu- 

 cleated particles from the healthy human liver : b, c, d, e. The same 

 from the liver affected with fatty degeneration, shewing in each the 

 light points or nuclei, with their nucleoli, and the dark contents of each 

 which are the fatty globules. 



[A reference to this page placed in the margin of page 99, opposite 

 the explanation to the plate, will remedy this error.] 



