152 NEMATOPHYCE.E. 



/3 Oogonia manifestly tumid. 



aa Oospores globose or subglobose. 



CE. calcareum, Wittr. 



CE. cardiacnm, Hass. 



CE. carbonicum, Wittr. 



CE. Pringsheimii, Cram. 



CE. punctato-striatum, D. By. 



/3/3 Oospores ellipsoid or egg-shaped. 



CE. Boscii, Le Cl. 



CE. tumidulum, Kutz. 



CE. Lanclsboroughii, Hass. 



v. gemelliparum, Pr. 

 CE. rivulare, Le Cl. 



Sect. 3. Species of which the organs of fructification are imperfectly 

 known. 



a. Oospores globose or subglobose. 



CE. delicatulum. Kutz. 

 CE. tenellum. Kutz. 

 CE. hexagonum. Hass. 

 CE. Londinense. Wittr. 

 CE. fasciatum. Kutz. 

 CE. capillaceum. Kutz. 

 CE. Hutchinsise. Wittr. 

 CE. princeps. Hass. 



b. Oospores subelliptic or oval. 



CE. longatum. Kutz. 

 CE. vesicatum. Lyngb. 

 CE. grande. Kutz. 

 CE. giganteum. Kutz. 

 CE. crassum. Hass. 

 CE. subsetaceum. Kutz. 



The following of Hassall's species of Vesiculifera have not been iden- 

 tified: 



Yesiculifera condensata, Hass. F. W. Alg. p. 196. 

 Cuvieri, Hass. F. W. Alg. p. 198. 



Ralfsii, Hass. F. W. Alg. p. 199, t. 50, f. 8. 



virescens, Hass. F. W. Alg. p. 200, t. 50, f. 5. 



ovata, Hass. F. W. Alg. p. 20], t. 50, f. 6. 



dissiliens, Hass. F. W. Alg. p. 202, t. 50, f. 7. 



sphserica, Hass. F. W. Alg. p. 204, t. 53, f. 5. 



ingequalis, Hass. F. W. Alg. p. 205, t. 53, f. 2. 



dubia, Hass. F. W. Alg. p. 206, t. 53, f. 14. 



Mulleri, Hass. F. W. Alg. p. 207, t. 53, f. 10, 

 alata, Hass. F. W. Alg. p. 208, t. 52, f. 9. 



affinis, Hass. F. W. Alg. p. 206, t. 53, f. 1. 



Some of Kutzing's species, which are imperfectly described, have been 

 mentioned as British, but we have no sufficient knowledge of them to 

 Warrant their insertion. 



