no 
BRITISH GALLS 
slenderness of their eel-like shape can hardly be conveyed 
by statement of measurement, but when magnified 200 times, 
so that they appear a little more than 8 inches in length, 
their greatest magnified width hardly exceeds £ inch.” 
Ova kept dry for six months will produce young, and young 
eelworms can survive two years’ drought. 
Tylenchus fucicola attacks Seaweeds. It causes oblong 
swellings of the thallus with internal cavities in Ascophyllum 
nodosum Le Jolis. It is also said to infest Furcellaria fastigiata 
Lamouroux. See papers by Barton referred to in the 
Bibliography. A species of Tylenchus , fucicola (?), infests 
Chrondns crispus Stackhouse, and Rhodymenia palmata 
Greville. Mr. A. D. Cotton, F.L.S., informs me that he 
very frequently finds galls on Rhodymenia , but has failed to 
discover eelworms in them. “ It appears to me likely 
that the wart-like swellings on Rhodymenia may sometimes be 
produced by some other cause. I have also found galls not 
infrequently on Cevamium rubrum, but am not aware that 
anyone has explained their origin and character.” 
Tylenchus graminis causes minute oval or elongated, dark 
green or blackish pustules on the under surface of leaves in 
the Sheep’s Fescue Grass. 
Tylenchus millefolii causes very marked distortion of the 
entire plant in the Common Milfoil (Plate XV.). The 
hypertrophy consists of globular growths about the size of 
a hemp-seed, solitary or coalescent, yellowish-green at first, 
becoming brown. Each swelling contains numerous worms. 
These galls may be found throughout the summer and 
autumn, but are by no means common. Our illustration is 
from Plate XCVII. in Connold’s “Vegetable Galls,” wherein 
these galls are unfortunately ascribed to the presence of the 
larvae of the dipteron Rhopalomyia millefoliae. 
Tylenchus tritici deforms the Marsh Bent Grass, causing 
elongated swellings about 5 mm. by 3 mm. at the base of the 
leaf, and globular growths about 1 to 5 mm. in diameter on 
the panicle. These hypertrophies are yellowish at first, 
becoming red or purple at maturity. 
