296 FLORA OF PLYMOUTH SOUND 



about to publish the results of an examination of the ova of Cutleria 

 muUifida at the time of fertilization^ my examination by means of 

 the microtome leading me to say that the ovum is, as to be expected, 

 nucleated. Hence, if I am correct, a re-examination of the process 

 of fertilization in the Cutleriacex, in which account will be taken of 

 the behaviour of the ? pronucleus, is necessary. I propose to use 

 the microtome in the examination of the ova of other brown sea- 

 weeds, making use of much the same method as that which has been 

 so successfully employed in the investigation of the maturation, &c., 

 of the animal ovum. 



I was quite unsuccessful dredging off the entrance to Mill Bay, 

 the inner waters of which I did not examine. Dredging off the 

 Laboratory, and in an easterly direction towards Batten, the speci- 

 mens found were generally small and dirty, especially in Batten 

 direction. 



The chief forms found were — 

 Halymenia ligulata (a little). Rhodymenialaciniata, E. ciliata, 



Kitophyllum seirospermum, X. E. palmata. 



punctatum. Delesseria alata, D. hypoglos- 



EytiphlEea complanata. sum, D. ruscifolia. 



Callithamnion, several species, Chylocladia clavellosa, C. arti- 



including C. thuyoideum. culata. 



Antithamnion cruciatum, A. Monospora pedicellata. 



plumula. Chantransia virgatula. 



Bonnemaisonia asparagoides. Gelidium corneum. 



Sarcophyllis edulis. Ceramium diaphanum. 



Kallymenia Dubyi. Punctaria, Desmarestia, Chorda 



Gigartina mamillosa. filum. 



Gracilaria confervoides. j Laminaria saccharina. 



Ehodophyllis bifida. ' 



Bryopsis plumosa is found in several pools on the beach below 

 the Laboratory, immediately east of the ladies' bathing-place. In 

 one plant found here I saw zoospores, without, however, being able 

 to bring about the dehiscence of the zoosporange. 



The Laira. 



Dredging in the Laira, as in the greater part of the Hamoaze, is, 

 owing to the mud, out of the question. Under the Laira railway 

 bridge, at the bases of the pillars, the genera Ulva and Porphyra are 

 to be found in great plenty. The mud-banks above the railway 

 bridge were, owing to the thick deposit of china clay works' refuse, 

 too soft for extensive searchings on foot. I found it necessary to 

 stay in the punt, and to pick up with the boat-hook as I moved 



