192 
A. E. Lechmere. 
New segments are formed by apical growth of the hypha. 
Multiplication of the segments by subsequent constriction of an 
already completed segment does not occur. Lateral branches 
arise always from the upper part of a segment just below the 
constriction and have a constriction at their base. 
Sporocysts are terminal and borne singly, or one behind the 
other, by basipetal development of the existing segments, which 
then become separated by plugs of cellulin in the constricted area. 
Each sporocyst is formed from one segment which becomes 
more or less swollen. The discharge takes place by means of a 
terminal process, but when a row of sporocysts occurs, these 
below the terminal sporocyst discharge by means of lateral 
processes. New sporocysts can arise by upgrowth of hypha, as in 
Saprolegnia, by lateral branching of the hypha, as in Achlya, or by 
basipetal transformation of successive segments. 
Zoospores are unicellular, egg-shaped, with two equal terminal 
cilia, and are discharged motile and immediately disperse by active 
swarming, possibly diplanetic. 
Sexual organs and oospores unknown. 
The genus Apodya comprises one single species, A. Lactea 
separated by Cornu, 1872, from the genus Leptomitus, where it had 
been placed by Argardh, 1824. 
The remaining twenty-nine species of the genus Leptomitus 
mentioned by Kiitzung in his “ Species Algarum ” do not belong to 
the Saprolegniaceae at all. 
Below is given a list of the synonyms of this species:— 
Apodya lactea. (Argardh, 1824), Cornu, 1872. 
Synon. Conferva lactea. Roth bei Dillwy, 1809, Brit. Con- 
ferv. Tab. 79. 
Leptomitus lacteus. Argardh, 1824, spec. Alg. 
,, ,, ,, bei Kiitzung, 1843, Phycol. Germ. 
Saprolegnia Liberiice (Argardh) Kiitzung 1849, Spec. Alg. 
,, lactea. Argardh bei A. Braun, 1851, Verjiingung. 
,, „ (Argardh) Pringsheim, 1860, Jahrb. wiss. 
Bot. II. 
,, dichotoma. Suhr. in Breutel Flor. Germ. exs. 206. 
,, corcagiensis. Hartog, 1887, O.J.M.S., XXVII. 
Prom the foregoing account of the genus Apodya, it will be 
seen that on two points Species II. is in close agreement. 
In the first place, on account of the method of forming 
sporocysts by basipetal transformation of successive segments of 
