Minutes of Proceedings. 
XV 
" The Mosses of South Africa," by Horace A. Wager. 
The author gives a catalogue which he states is the first attempt that 
has been made of pubhshing a hst of the mosses abeady recorded from 
South Africa, except for a small catalogue of the Mosses of Cape Colony 
published by J. Shaw in 1878. It may be by no means complete, but it 
is published in the hope that it may be the means of getting further 
material from collectors for identification, so that the record may be made 
still more up-to-date. 
" A Mesostoma from Bloemfontein {M. Karrooense, n. sp.)," by T. F. 
Dreyer. 
A description is given of this new species of worm obtained from a 
small temporary pond on clay soil, which is always contaminated with 
cattle droppings. Although the whole organization of the animal indicates 
a close relationship with Mesostoma lingua, it possesses a vagina, the 
absence of which is one of the diagnostic features of the family Typhlo- 
planidae ; and in connection with this, goes the absence of the bursa, 
which is typically present in the genus Mesostoma. The points of resem- 
blance between the present animal and other species of Mesostoma are, 
however, so numerous that it would be folly to establish a new family to 
receive it; the only correct course is to drop "vagina absent" from the 
diagnostic characters of the Typhloplanidae in future. 
" Note on Hesse's Generalization of Pascal's Theorem," by Thomas 
MuiR, LL.D. 
The purely geometrical theorem known as Pascal's was investigated 
by Cayley and others as a theorem in co-ordinate geometry, and Hesse, in 
doing so, had the good fortune to employ certain identities which he saw 
to be capable of a wider application, and thus to lead to a generalization of 
Pascal's geometrical result. The present paper extends the said identities 
and seeks to place them in their natural relation to others of importance in 
a different domain. 
" Herpetomonidae found in Scatophaga hottentota (Diptera) and 
Chamaeleon pumilis (Lacertilia)," by H. Bayon. 
Descriptions are given of flagellate protozoa found as parasites in the 
common " blind-fly" on Eobben Island and in the chamaeleon. Though 
slight differences in size and appearance are noticeable in these Herpeto- 
monads from different sources, still they certainly are not more marked 
than those found in samples taken from the same artificial culture of 
Leishmania at a few days' interval ; therefore it does not seem advisable 
at the present stage of our knowledge to postulate two distinct species of 
protozoa. It does not seem excluded that a chamaeleon can get infected 
through swallowing a fly containing Herpetomonidae in its gut. It is 
usually admitted that flies infect each other by the contaminative or 
" casual " method, i.e. by ingesting faeces containing encysted protozoa 
