240 M. Miiller on the Development of the Lycopodlacese. 



edges of the under mandible rather high, and in the hind part very 

 much bent in." 



P. 257, line 34, /or ** Notes, habits, &c. not thoroughly known," 

 read " The notes, habits, &c. were completely recognised." 



This supposed variety of Motacilla alba is the M.luzoniensis, Scop. 

 (M. leucopsis, Gould, M. alboides, Hodgs.) 



No. 25. " Motacilla flava " is the Budytes viridis (Gm.), (5. beema^ 

 Sykes). 



P. 260, line 34, /or " The best are of compact coarse hay," read 

 *' They consist of compact coarse hay." 



P. 260, last line, for " this seemed the most probable," read 

 " were most frequently seen." 



H. E. Strickland. 



XXX. — On the Development of the Lycopodiacese. 

 By Karl Muller*. 



[With five Platen.] 

 [Continued from p. 1 20.] 



3. The antheridium. — a. The forniation of the sporangium. This 

 sporangium has a more simple structure than the oophoridium. 

 It is found, almost universally, under a more or less reniform 

 shape, having at the base a stalk, which is always longer than that 

 of the oophoridium (PI. V. fig. 9). The membrane is made up 

 of cells almost regularly hexagonal, a structure which is very va- 

 rious in different species. In L. denticulatum it dehisces trans- 

 versely over the vertex when ripe ; but this condition is also 

 subject to modification according to the species. In the interior 

 is then found a free pulverulent mass, the well-known so-called 

 Semen Lycopodii. As usual, they are tetrahedral cells which only 

 differ in respect to size and nature of surface. In L. denticula- 

 tum the surface is covered by a number of papillae which are 

 broad at the base and, diminishing to a point above, are usually 

 somewhat curved (PI. V. fig. 1). Seen in any quantity, these 

 spore-cells usually appear yellow : this is the case in L. denticu- 

 latum : in L. pygmceum and other species they appear reddish. 



These antheridia are produced in considerable numbers on the 

 other branch, opposite to that which is transformed into the 

 oophoridium (PI. IV. fig. 6). It is thus evident a priori, that 

 the antheridia cannot be regarded, like the oophoridium, as meta- 

 morphosed terminal buds of a branch. 



• From the * Botanische Zeitung,' Sept. 25, 1846. Translated by Arthur 

 Henfrey, F.L.S. &c. 



