76 rEOCEEDixGs or the 



a frog-tadpole at tbe age of one month. As this tadpole unfor- 

 tuuatel_y died the day after the last drawing was made, I have 

 wondered whether the blue spots were possibly the result of an 

 niihealthy condition, but I have not had the opportunity of 

 repeating the observations. 



Note. — In Miss Hinckley's "Notes on the Development of 

 Rana sylvatica" which appeared in the ' Proceedings ' of the 

 Boston Natural History Society, she mentions the continual change 

 of colour taking place in the skin of the frog. So rapid were these 

 changes, that she found it almost impossible to secure a correct 

 representation. She found that within lifteen minutes the frog, 

 if placed in a glass on white paper, would turn from the ordinary 

 shade of brown to light ashy fawn. 



Schnetzler beheved that " the privation of light diminished and 

 stopped the foruiation of the colouring matter of the skin," and 

 according to his experiments frogs reared in green glasses remained 

 very black. 



III. 



On the Occurrence of Ar/rostis verticillata, Vill., and Alsine 

 atheniensis, nobis, in the Channel Islands. By (x. Clauidge 

 Dkuce, M.A., E.L.S. 



[Read 7th March, 1907.] 

 Ageostis tebticillata, Vlllars, in the Channel Isles. 



A. verticillata, Yillars, Prosp. PI. Dauph. p. 16 (3 779), et His- 

 toire, ii. p. 74 (1787) ; not of Thuih. PI. Par. ii. p. 36 (1790). 

 — A. stolonifera, Linn. Herb, (not of the 'Species Plantarum'); 

 Eichter, PI. Europ. p. 42 (^1690). — A. aquatica, Pourr. in Act. 

 Toul. in. p. 306 (17b3).— ^. densa, M. Pieb. PI. Taur. Cauc. 

 i. p. 56 (1S09).— .4. refracta, Moench, Meth. Suppl. p. 60 

 (1794). — A, alba, Chaix in Vill. I. c, not ot Linn. — A. rivu- 

 laris, Brot. Pi. Lusit. p. 75 (lb04). — A. VUlarsii, Poir. Euc. 

 Meth. Supph i. p. 251 (1810). 



Vilfa stolonifera, Presl, Cyp. & Gram. Sic. p. 22 (1820). 

 Inhabiting South Europe and Portugal ; adventitious in Western 



Prance and Hamburg. 



Descr. Stoloniferous. Stems 6-20 inches, geniculate, ascend- 

 ing; leaves flat, soft, glaucous; ligule short, truncate; panicle 

 1-4 inches long, compact, thyrsoidly-lobate ; branches rough, 

 remaining open after llo\^erillg, garnished tvith spikelets to their 

 base, greyish-green or purphsh-red ; glumes subobtuse, puberously- 

 scabrid over the whole surface; pales equal, obtuse. 



This species greatly resembles Agrostis alba (the variety of 

 which in Britain we know as A. stolonifera, and is perhajis 

 identical with var. 'prorepens, Ivoch) in habit and general appear- 

 ance, but may be kno^\n by the bianchlets being garnished with 



