244 ~ 
Dr. Ritzema Bos states that when the air is moist the eelworms 
migrate from old diseased parts and enter other healthy portions of 
the frond or leaf, through the stomata, and that when diseased 
plants are placed in fairly dry air, such migration cannot take place. 
He further states that dusting the plants with a mixture of tobacco 
powder and sulphur is an excellent remedy. 
The eelworm has attacked Aneimia collina, Raddi, Pteris Droog- 
mantiana, Li. Linden, Adiantum capillus-veneris, L., and Lygodium 
volubile, Sw., amongst others, at Kew. 
Fig. 1. Ancimia collina, Raddi, showing the eelworms in the tissue of the frond 
_ under the epidermis x 300. 
Fig. m= Pteris Droogmantiana, L. Linden. The dark streaks are caused by the 
worm 
ee. ; 
Fig. 3. Adiantum capillus-veneris, f. fissa, showing dark patches due to eelworm. 
Fig. 4. Lygodium volubile, Sw., with dark streaks caused by eelworm. 
TERRESTRIAL ISOPOD CRUSTACEA. 
Richard §8, Bagnall. 
Five species of woodlice have already been recorded from the 
Royal Botanic Gardens, Kew, namely, Trichoniscus roseus, Onvscus 
asellus, Porcellio scaber, Philoscia muscorum, and Armadillidium vul- 
garis, but to make the following list as complete as possible these 
forms have been included, ; 
On December 2nd, 1907, the writer and Mr. H. St. J. K. Donts- 
oe spent an hour in the propagating pits in search of ants, 
beetles, woodlice, etc., and as the results were so satisfactory, 
returned and collected for the greater part of the following day- 
Eighteen species of woodlice were obtained and noted, two of whic 
have been described as new, whilst three others await identification. 
ur of the five species already recorded were more or 1¢ 
plentiful, but Armadillidium vulgaris was not met with. 
