ON THE PILOBOLIDiE. 
149 
ON THE PILOBOLIDiE, 
WITH A SYNOPSIS OF THE EUROPEAN SPECIES, AND A 
DESCRIPTION OF A NEW ONE. 
BY W. B. GROVE, B.A., 
HON. LIBRARIAN OF THE BIRMINGHAM NATURAL HISTORY AND MICROSCOPICAL 
SOCIETY. 
(Continued from page 135.) 
§ 3.-PlLOBOLUS. 
It lias already been mentioned how specimens of Pilobolus 
can be readily obtained. They can also be found on not 
quite fresh cow or horse dung in sheltered places, but not so 
easily, for a reason which will be evident hereafter, as by 
growing them within doors. It is evident that the spores 
must be very widely diffused ; they exist in the dung when it 
is brought in from the road or field, and considering how 
often they make their appearance under these circumstances, 
we must allow that they are constantly eaten by the animals 
with their food, probably with the grass, and then pass 
PLATE IV. 
DESCRIPTION OF THE FIGURES. 
Fig. lc. A basal reservoir, which happened to be above the surface of 
the matrix x 45. 
5. Top of the stem, showing the commencement of the 
sporangium x 45. 
Fig. 2. The apex of a stem, excreting a large transparent globe of 
fluid x 45. 
Fig. 3. A stem, with the columella just formed x 20. 
Fig. 4. Another, a little more advanced x 20. 
Fig. 5. A stem which had been injured, and has put forth a new 
perfect stem from below the injured part x 30. 
Fig. 6. Arrangement of the granules in the sporangium, just before 
the formation of spores. 
Fig. 7. Spores of P. Kleinii x 500. 
Fig. 8. Base of sporange showing the black cap (a), the diffluent 
zone (5), the columella (c), and the granules heaped in a 
ring at the summit of the swelling (d) x 500. 
Fig. 9. Spores of P. Kleinii , forma sphcerospora x 500. 
Fig. 10. Columella x 50 
Fig. 11. Stem which has thrown off its sporange x 30. 
Fig. 12. Base of swelling, showing (a) the pseudo-septum of Coemans, 
and the meridional streams of granules x 80. 
Fig. 13. A perfect specimen of P. Kleinii x 45. 
Fig. 14. P. cedipus; a, the mycelian apophysis x 20. 
Fig. 15. Spores of P. cedipus x 500. 
Fig. 16. Spores of P. eu-crijslallinus x 500. 
All the figures are drawn from P. Kleinii , except 9, 14, 15, and 16 ; 
they are all from nature. 
