300 T. H. BUPPHAM ON ANTHERIDTA. 



posed it to be an abnormal form of conceptacle of OoralUna 

 squamata Ellis, as those lie examined contained zonate tetra- 

 spores. Like several otter parasites it belongs to the same 

 order as its hosts. The male and other conceptacles are much 

 smaller than those of the hosts. I found all three kinds of 

 organs of this parasite on Corallina ruhens Ellis et Sol. {Jania 

 ruhens Lamour.) (Swanage, Aug. 1890.) For figures see 

 jEtudes, PI. 50. 



To turn now to the corresponding early stage of the female 

 organs I may say that procarps with trichogynes have been 

 observed on the following species. In most cases pollinoids 

 affixed to the trichogynes have also been seen. 



Choreocolax Folysiphonice Reinsch. — The procarp has many 

 long stout trichogynes, and frequently they bend at a right 

 angle and for the greater part of their length lie parallel with 

 the surface. 



Harveyella Tnirabilis Schmitz et Rke. — In this also the 

 trichogynes are long and thick, and possibly even more 

 numerous than in the preceding. 



Chondrus crispus Stackh. — In a specimen where the upper 

 portions of the thallus became much divided were clearer spots, 

 very numerous and close together, with yellowish bodies below 

 the surface. As these seemed like the work of an animal 

 parasite a portion was sent to Miss Ethel S. Barton, who, after 

 examination, thought the cells resembled " young procarpia 

 more nearly than anything else." Subsequently, in a section, 

 a short pale trichogyne could be traced to a group of the 

 yellowish cells, two large, four smaller, two of the latter lying 

 nearer to the surface of the thallus. 



BhodophylUs appendiculata J. Ag. {RTiodymenia bifida Grev., 

 /3 ciliata.) — The procarps are in very minute processes ; the 

 trichogyne is long and slender. 



Bonnemaisonia asparagoides Ag. — The transparency of the 

 procarp permits the trichogyne to be followed in its spiral way 

 to the exterior. 



Laurencia hybrida Lenorm. (X. ccespitosa Lamour.) — In the 

 apical depressions. 



Folysiphonia violacea Grev. 



