90 PROCEEDINGS OT SOCIETIES. 



and possessing but two arms on each segment, has been noticed. 

 As mentioned on a previous occasion, Mr. Archer was acquainted 

 with a three-rayed form, doubtless but a form of St. tefracerum, 

 and he was aware of compressed forms of the type of St. dejectum 

 (not precisely appertaining to that species). These cases (of 

 which the compressed form of >S'^. gracile is much the prettiest as 

 a microscopic object) would seem to go far to prove that certain 

 species with two lateral angles only to each segment, usually 

 referred to the genus "Arthrodesmus" (as A. incus, A. convergent), 

 are truly but two-sided Staurastra (very good species indeed in 

 themselves), and that Arthrodesmus, as a genus, ought to stand 

 only for such forms a.s Arthrodesmus ocfocornis. It is now highly 

 probable that other tri- and jwat^rj-radiate forms may be found 

 occasionally it-radiate only. 



Mr. Vereker showed hairs from seed of an, as yet, unknown 

 plant, sent to him from Nepaul, these hairs somewhat resembling 

 those of ivy leaves, and forming, polarised, a very pretty object. 

 Some of these seeds had been sown, and he hoped in due time to 

 be able to throw a further light on the nature of the source 

 whence the present exhibition emanated. 



Mr. Archer drew attention to examples of the encysted state of 

 the individual " monads" oi Phalansterium consociatiim (Cienkow- 

 ski) = Monas consociata (Fresenius, " Beitrage zur Kenntniss 

 mikrosk. Organismen," t x, f. 31 ; Cienkowski in ' Schultze's 

 Archiv,' Bd. vi, p. 428, t. xxiii, xxiv, f. 29 — 33), quite as described by 

 Cienkowski (Joe. cit.). The cysts are thick, doubly-convex bodies, 

 the circular edge rather acute ; the opposite sides, however, are not 

 quite equally convex, the acuteness of the edge being seemingly 

 increased by one " valve" (so to call it) of the cyst seeming to 

 project slightly beyond the edge of the other " valve." But it would 

 be unnecessary to dilate upon what has been already so accurately 

 described by Cienkow ski ; still the production of that phase of 

 tbe recent entity itself, side by side with that observer's so lately 

 published, though, indeed, rather rigid figure, would be, perhaps, 

 accounted of some interest. 



Mr. Archer thought he might be justified in showing once more 

 examples, with zygospores, of Spirotcenia truncata, these being 

 taken from a distinct and distant locality, Co. "Westmeath, those 

 shown on the last occasion being from Co. Kerry, and the present 

 being then the third time only this form had been met with in the 

 conjugated state. The form must be called a rare one, though 

 thus taken from wide apart sources, and found also in Cos. Wicklowr 

 and Dublin. 



22nd June, 1871. 



Mr. Crowe presented some vacated cases of the eggs of some 

 insect found attached to the flowers of furze, remarkable for the 

 singular and numerous spine-like decorations with which they 

 were furnished, giving them an exceedingly pretty appearance 



