18 THE MARIN K .VLG.1: OF GUERNSEr 



N. u>-ciNATUM J. Ag. [E. 2.] E. 11, dredged. N. 1. in 

 deep pools. 



N. EAMOSUM Batt. (3\ laceratum Grev.). f. N. 2. E. 6. 

 Rocks. — (c.i.) f. ciUlfera Kiitz. N.W. 4. W. 1. — (c.i.) 

 f. lohata Kiitz. E. 2, 5. — f. reptans (Crn.). Lyle in New 

 Phvt. xvii. p. 231, n. comb. On JLaminaria stipes, and L.itli. 

 poh/7norphum. — var. uncinatum Grev. (non jY". uncinatum 

 J. Ag.). N.W. 8. On CuraUina officinalis. — var. Smithii 

 Kiitz. AV. 8. 



N. HiLLiJt; Grev. [E. 10.] N. 2. E. 2, 6. In shady pools, 

 under ledges of rocks. 

 C.I. N. LiTERATUM J. Ag. In shadv pools. W. 1. 



(i. GOXIMOPHYLLIM BUFFHAMI Batt. W. 5. 



Phtcodrys RUBENS Kutz. {Delesseria sinifosa Lamour.). 

 [S. 3, 5. N. 2. N.W. 2.] W. 1. On Lrttn. Cloustoni. 



Delesseria saxguixea Lamour. E. 6. N.AV. 4. 



D. ALATA Lamour. f. E. 6. W. 7. On stipes of Lam. Cloas- 

 toni and on rocks. 



D. EUSCiFOLiA Lamour. e. S. 3. W. 6. On rocks. 



D. HYPOGLOssuM Lamour. Not common. N.W. 4. On rocks. — 

 (a.) var. august if olia Kiitz. E. 10. N.W. 3. On rocks. 



Bonnemaisoxia asparagoides Ag. Small specimens washed 

 up. [S. 5.] N. 2. E. 11. Dredged. 



There is a notice bv H. Kylin, see Journ. Microscop. 

 Soc. 1915, p. G04, of the occurrence of bladder-cells (Blasen- 

 zellen) in the thallus of Bonnemaisonia asjjaragoides and 

 other Florideai. These cells are filled with a homogeneous, 

 colourless, strongly refractive substance, from which iodine is 

 liberated on the death of the plant by the bursting of the 

 bladders. "The iodine stains blue any starch solution, and 

 leaves a blue mark on paper." The function of these cells is 

 considered by the author as protective against small animals 

 which eat algre. 



Rhodomela subfusca Ag. [E. 2, 10. N.W. 5.] W. 1, 4. 

 Sandy stones and pools. — (c.i.) var. graciliot' J. Ag. E. 6. 



Lafrencia obtusa Lamour. — f. qenuina Hauck. [N.W. 4. 

 W. 5. E. 2, 10.] W. 4. N.'W. 7.— (c.i.) var. cnicifera 

 Hauck. W. 4, o. — (c.i.) xav. pf/rajnidata J. Ag. N. 1. 



L. c.ESPiTOSA Lamour. c. On stones, in shallow sandy pools. 



L. PiNNATiFiDA Lamour. e. On rocks. — (c.i.) var. tenuissima 

 Turner., One specimen on rock. S.W. 



This was found in November among locally sheltering rocks 

 in an exposed position. Dawson Turner's specimen of this 

 variety is a very small plant, scarcely more tlian 1 inch in 

 length and Avith mostly alternate branching. The Guernsey 

 specimen is about 1| in. in heiglit and differs in bearing 

 mostly opposite branches. 

 Halopitiiys incurvus Batt. {Riftiphloea pinastroides Ag.). 

 Dredged '11. W. 1, 4. a. In half-tide rock-pools and on 

 rocks at low tide. 



