J- UK MARIN K ALfci.£ Ol' GlEItNSIJY 19 



Choxukia ti<;.\ LJssiMA Ag. (Ltdirriicia /r/i/f/s.simff. llarv.j. 



[E. 6. J N.VV. 4. In Scuul. 

 C. DAsvFiiVLi.A Ag-. {^Laurencid diist/phi/lhi Grev.). [E. 10, 3. 

 S. 5. N.W. -k] E. 2, (3. Oil stones in sand. 

 c.i. C. c.i;kulescens J. Ag. v.r. S. 1. In a rock-pool at low tide. 

 A large and luxuriant patch of this rare alga grew in an 

 extremely sheltered position in Guernsey. Jts only other 

 British habitats are Hastings and Felixstowe. 

 PoLYSiPiioNiA MAC'iiocAKPA Harv. (P. piiU'hiuta Pliy. Br. k 

 P. serfitlarioi(l(',<i Holm. & Batt. Rev. J.istj. [S. 2." E. 4.] 

 S.W. S. 4. W. 1, 5. On Lith. incrttstaus and in chinks 

 of rock. 



Summer specimens are typical, those gathei-ed in autumn 

 are more robust, characterized by thickened filaments, darker 

 in coloiu', much broken, densely tufted, and interwoven. 

 Particles of sand, shells, etc., held in the interstices of the 

 filaments afford a shelter for sporelings. 

 P. FiBRATA Harv. f. AV. 1. S. 5. N.W. 3. 

 P. URCEOLATA Grev. — var. fypica J. Ag. [S. 5.] E. 2, 5, 7, 

 N.W. 4 W. 4. N. 1. f.— (u.) var. patens J. Ag. S.W. 

 W. 1. S. 3. On Lam. Cloifstoul -dud on rock». — \2iY. fonnosa 

 J. Ag. {P. fonnosa Suhr.). W. 1. 

 G. P. ELOJSGATA Grev. W. 4, 6. E. 2. On stones in sand and 

 ropes of lobster-pots. — var. denudata Grev. W. 2. 



This seems to have reappeared recently. It figures in 

 the old lists for Guernsey, but Mr. Marquand was unable to 

 find it. Abundant specimens occurred in shallow sandy pools 

 at Ilocquaine Bay and Lihou in 1911: in the autumn of the 

 same year the ropes of some lobster-pots at Pezerie were pro- 

 fusely covered with f. nuda. Only a few old plants were to 

 be seen in 1914 ; they were beginning to put forth new shoots. 

 P. viOLACEA Grev. c. On rocks and other algse. 

 P. FIBRILLOSA Grcv. r. N. 2. 

 P. FASTKiiAi A Grev. c. 



In addition to its usual habitat on AseopJiyUiiin nodosum 

 this was found on Facus vesicnlosus var. evesicidosus in 

 exposed locahties. 

 G. P. CERAMi-EFORMTS Cm. V.r. E. 6. One small specimen, 

 P. siMULANS Harv. [E. 4, 10. S. 3.] E. 2, 7, 8. N.W. 2, 3, 4. 



N. 2. Fringing deep pools. 

 P. OPACA Zan. — f . slmplicior. [S. 2. In sand at half-tide level.] 

 P. NIGRA Batt. (P. afro-rubesceus Grev.). [S. 2. N.W. 2.] 



S.W. E. 6. N. 1, 2. 

 P. OBSCURA J. Ag. [N.W. 2.] W. 4, 5. r. In sand. 

 P. NiGRESCENS Grev. c. [N.W. 4. S. 2. E. 10.] E. 2, 6, 8. 

 W. I, 3, 4, 5. N. 1. S.W. In sand.— var. affinis J. Ag. 

 (P. affinis Moore). E. 2. 

 P. Brout.et Grev. [S. 5. N.W. 4. E. 10.] S. 2, H. W. 1, 2, 4, 



.5,7,8. E. 2, 6. N. ],2. 

 P. suBULiFERA Harv. [E. 6. S. o.] 



c2 



