48 Sir Everard Home on the propagation, &c. 
the ova imbedded in the yellow granular substance of the 
ovarium, magnified too diameters. 
Fig. 2. A transverse section of a portion of the oviduct; 
magnified 2 diameters. 
Fig. 3. A small portion of the inside of the oviduct, with 
some of the ova ready for emission ; magnified 20 diameters. 
Fig. 4. Several ova, of various sizes, extracted from the 
ovarium ; magnified 100 diameters. 
Fig. 5. Ova, in the early state, extracted from the oviduct, 
and floating in water ; magnified 100 diameters. 
Fig. 6. Ova nearly ready for emission, extracted from the 
oviduct, and floating in water ; at A is one just bursting its 
enclosing membrane or bladder ; magnified 100 diameters. 
Fig. 7. Some young muscles, just emitted, floating in water, 
where they are opening and closing in a very lively manner 
for several hours ; magnified 100 diameters. 
Fig. 8. Is the origin and progress of a singular worm, 
which is found within the oviduct of the muscle : originally 
it is an extremely minute globule, which is only to be distin- 
guished from the usual granular substance by a curious 
rotatory motion, which it performs incessantly until it becomes 
quite organised ; and it attains sometimes the length of an 
inch; magnified 100 diameters. 
