108 PROCEEDINGS OF SOCIETIES. 



opening bordered by indistinct teeth, but sometimes indefinitely 

 terminated, even as if somewbat torn (with, as it were, an " un- 

 finished" appearance there) ; no spines whatever ; nucleus, with 

 nucleolus, large, well-marked, posterior (as usual in the genus) ; a 

 band of darkish granules across the middle portion. Its small 

 size, the ovate compressed form of the test, without any neck, 

 the reddish colour and very minute facets, seemed to render the 

 form now shown a very distinct Euglypha. It occurs not rarely 

 on Bray Head, but Mr. Archer had not noticed it from any other 

 locality. In reference to its high tint, as compared to the other 

 always colourless and hyaline species, Mr. Archer thought this 

 form might stand as JEuglypha tincta. 



September IQth, 1875. 



Sections ofleafofPinus {Tsuga) Sieholdii, var. nana, exhibited. — 

 Dr. McNab showed sections of the leaf of the foregoing species — 

 the Finie — of the Japanese. It differs considerably from the typical 

 form in having the young shoots hairy, a character not mentioned 

 by Parlatore, the leaves much smaller and having well-developed 

 hypoderm cells. The type-form has the shoots perfectly glabrous 

 and developes no hypoderm except at the margins of the leaf. 

 The characters observed seem to warrant the foregoing being 

 considered a distinct species, bearing the same relation to Sieholdii 

 that Mertensiana does to Canadensis, and Hooheriana to Pat- 

 toniana. 



Peculiar globular problematical bodies occurring in diseased 

 potato-leaves. — Mr. Grreenwood Pim showed preparation of dis- 

 eased potato-leaf infected with Peronospora infest ans treated 

 after the manner recommended by Mr. Worthington Smith, viz, 

 maceration in water. There were to be seen a number of spherical 

 bodies with somewhat rough or tuberculated exterior, the external 

 coat of which showed a certain amount of tendency to split into 

 three valves, and this circumstance, coupled with the fact that 

 no direct connection of these with the hyphse, which abundantly 

 permeated the cell-substance of the leaf, could be detected, 

 rendered the nature of these bodies problematical. They were 

 at first taken for the resting-spores of the Peronospora, but that 

 ceemed to be at best but doubtful. This indeed imparted to them 

 probably even a more considerable interest. It was seemingly 

 highly unlikely they could be any kind of pollen-grain, so tho- 

 roughly interspersed as they were in the substance of the leaf. 

 Mr. Pim detected some much smaller colourless bodies, possibly 

 the antheridia, alluded to by Smith, but could not satisfy himself 

 on the point. 



Nectria peziza exhibited. — Mr. Pim likewise showed a specimem 

 of Nectria peziza in which the white spores were oozing in a 

 globule from the orange spherical stromata, the whole forming a 

 very pretty object for a low-power and reflected light. 



Sections of Petioles of Nymphcea, species exhibited. — Mr. Mack- 



