12 HIRUDO. 
12th of June. The orifice of the oviduct which, as in leeches, is near 
the anterior extremity, was greatly dilated on the 14th. And through- 
out the night of the 15th, a vast quantity of spawn was discharged. 
This consisted of transparent albuminous matter, wherein the ova 
were imbedded, each containing a solid yellow globule, im a much larger 
transparent sphere, from the dimensions of which the ova appeared 
considerably apart from each other.—Spawn, fig. 24 ; a portion enlarged, 
fig. 25. 
The animal was now much reduced ; and, on the 20th of June, had 
become greatly disfigured. Nevertheless a new mass of spawn was dis- 
charged ; and the parent was evidently dead. 
The whole spawn subsequently disappeared. 
Puate I, 
Fic. 22. Hirudo grossa at rest. 
23. Extended. _ 
24, Spawn. 
25. Portion of the same, enlarged. 
§ 4. Hrrupo campanuLata—T'he Bell Leech.—Plate I. figs. 26, 27. 
Two specimens of this animal occurred among a quantity of mis- 
cellaneous marine collections, but whether they were young or adult, no 
circumstances enabled me to judge. 
Length, when extended, thirteen lines, body round, diameter about 
half a line. The anterior extremity dilates as a very broad disc, some- 
what like a flattened hand-ball ; the posterior extremity dilates in the 
same manner ; sucker very large proportionally. Colour of the body 
dark olive, finely speckled with yellow. Disc and sucker very pale. 
These animals were extremely restless. They perished in a fort- 
night from accidental impurity of the water. 
Prare I. 
Fic. 26. Hirudo campanulata. 
27. The same enlarged. 
