On Spores in the Carhoniferotts Formation of Scotland. 115 



eventually splits into three subtriangular segments (Figs. 19, 

 and 20 a, h, c, e). Outer surface smooth or bearing bristle-like 

 hairs. 



Lagenicula I. PI. VI, Figs. 20a-s. 



Macrospore flask-shaped; outer surface provided with 

 bristle-like hairs of various forms. Some of the chief forms 

 of the hairs are shown at Figs. 20/-s. The hairs vary in 

 outline, not only on different individuals, but on the same indi- 

 vidual. The most common form of this macrospore is given 

 at Figs. 20<x, &, c, d. At Fig. 20^ is shown another form which 

 occurs in great quantities at Locality 1. This does not differ 

 from the type except in size, but it may be conveniently 

 distinguished as var. major. 



In the neighbourhood of the trilabiate expansion the 

 spines are smaller and less numerous, and on the lips they 

 appear to be entirely absent. Figs. 20n and /are hairs from 

 var. major ; at Fig. 20/ the bristle has a knob-like extremity ; 

 Figs. 20^, h, i may be such hairs with the extremities frac- 

 tured ; Figs. 20Z and k give two other forms of knob-like hairs ; 

 and the remaininoj fissures afford additional illustration of 

 their diverse form. These epidermal appendages would also 

 be most probably included by Eeinsch in his Stelidem. This 

 form of macrospore is very plentiful in the Lower Carboni- 

 ferous Limestone Series. 



Size of type. — Trans, diam., 1*27 mm. to 1*1 mm. 



Size of var. major. — Trans, diam., 2 mm. to 1*50 mm. 

 Hirsute appendages vary much in length. 



Horizons. — Calciferous Sandstone Series and Carboniferous 

 Limestone Series. 



Localities.— 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 14, 15, 16, 18, 

 19, 20, 21, 22, 37. 



Lagenicula II. PL V., Fig. 19. 

 Macrospore small and smooth. 

 Size. — Trans, diam., 0-90 mm. 



Horizons. — Calciferous Sandstone Series; Carboniferous 

 Limestone Series ; and Coal Measures. 

 Localities. — 8, 19, 28. 



