MARINE ALG^E OF BEAUFORT, N. C. 



553 



Trichogyne, the slender prolongation of the female 

 organ (carpogonium) of the Florideae with which 

 the male cell fuses as the beginning of fertilization. 



Trichome, any hairlike outgrowth from the surface- 



Trichothallic , a method of growth in a thallus bear- 

 ing apical hairs by cell divisions at the bases of 

 the hairs between these and the wider part of 

 the thallus. 



Trichotomous, a method of branching by forking 

 into three approximately equal parts. 



Truncate, appearing as if cut off at the end. 



Turgid, distended by the pressure due to the cell 

 contents. 



Undulate, wavy. 



Uniaxial, having a single primary axis. 



Unilateral, one sided , borne on or turned to one side . 



Unilocular, a term used for the sporangia of many 

 Phaeophycese which are not divided into sep- 

 arate compartments, but produce numerous mo- 

 tile spores in the single cavity of the sporangium. 



Unisexual, bearing the organs of only one sex on a 

 single individual. 



Urceolate, pitcherlike. 



Vacuole, a cavity in the living material of cells, 



containing a clear, watery solution, the cell 



sap. 

 Ventral, referring to the lower, or front, surface of 



a dol-si ventral structure. 



Verrucose, appearing as if having warts, warty. 

 Verticillate, arranged in a whorl of similar parts 



around an axis. 



Vesicle, a small, bladderlike structure or cavity. 

 Vesicular, possessing vesicles. 

 Virgate, long, slender, and unbranched, wand 



shaped. 



Zonate, a method of division of a tetrasporangium 

 by three walls in the same plane, all four result- 

 ing tetraspores being visible from the surface, 

 lying in a single row. 



Zonation, the superficial marking of a thallus by 

 concentric lines. 



Zoo spore, a motile spore. 



Zygote, the cell formed by the fusion of two sexual 

 cells. 



