394 
ANALYTICAL INDEX. 
CHAPTER II.—continued. 
A. 1.—GorpIUs GESSERENSIS,—PLANARIA GESSERENSIS,—WMiiller, 
A. 
B.— 
Description of the animal, 
Sometimes feeds on mussel, 
Plate X. fig. 5, 
2.—GorpDIUs ALBICANS,—Whitish Gordius— 
Assigned a provisional place, 
Animal described, 
Plate X. explained, 
GORDIUS GRACILIS— 
Description, 
Has a double ovarium, 
C.—Gorpius ALBUS, 
Assigned a provisional place, 
Length, form, &c., 
Feeds voraciously on mussel, 
Survived the loss of proboseis and cntesenal organs, 
Plate IX. explained, 
D.—Gorpius aquaticus—The Hair Worm, 
§ 3. 
Inhabits the fresh-waters of Scotland, 
Size, form, &e., 
Extensively dispersed, 
This animal’s metamorphosis to an el a Paper maiiakes 
PAGE 73 
ib. 
ib. 
ib. 
Specimen extracted from a person’s throat after a draught of water, ib. 
GorDIUS SPINIFER, 
General remarks, 
a@,—GORDIUS VIRIDIS SPINIFER, 
Size, organs, &c., 
Plate XI., explained, 
b.—GoRDIUS PURPUREUS SPINIFER, 
Scarcely any other distinction than colour, 
Account of specimens, 
Plate XI. explained, 
c,—GORDIUS FRAGILIS SPINIFER— 
Dimensions, colour, &c., 
Specimen had the peculiarity of a TRAN) silken sheaths 
79 
ib. 
