188 ALLAX HANCOCK PACIFIC EXPEDITIONS \OL. 17 



PLATE 8 



Fig. 1. Boss/a siK/ittata Dawson & Silva. A portion from near 



the middle of a plant from the type collection, X 5. 



Fig. 2. liossea dichotoma Manza. A branching tip of a typical 



plant, D. 6500, Bahia Colnett, Baja Calif. X 4.5. 



Fig. 3. Jania tinflla van zacae Dawson. A young plant of the 



type collection to show basal disc and flattened seg- 

 ments. X 20. 



Fig. 4. Bossea pachyclada Taylor. Portion of a tetrasporic 



plant of the slender, thick form from Isla (niadalupe, 

 D. 8528. X 5.4. 



Figs. 5-6. Bossea insulaiis Dawson & Silva. Fig. 5. Part of a 

 paratype specimen of the larger form of the species, 

 D. 9i76, Bahia Asuncion, Baja Calif. X 4.5. Fig. 6. 

 Part of a paratype specimen of the smaller form of the 

 species, D. 2764, Punta Santa Rosalia, Baja Calif. X 4.5. 



Fig. 7. Bossea cooperi Dawson. Part of a tetrasporic plant of 



the tvpe collection. Cooper 545, Plava Rosarito, Baja 

 Calif'. X 4.5. 



Fig. 8. Bossea liciulata Dawson. Part of a plant of the type 



collection, D. 8532, Isla Guadalupe, Baja Calif. X 4.5. 



Fig. 9. Calliarthron ihfilosporioides Manza. Part of a tetra- 



sporic plant of Cooper 769, Punta Santo Tomas, Baja 

 Calif. X 5.4. 



