298 Rev. R. T. Lowe on Melampus, &c. 
July 22. Sickly one dead and putrid; the other quite healthy. 
24. The surviver quite healthy ; water changed. 
July 27. Ditto ditto. 
30. Ditto ditto. 
August 3. Ditto ditto. 
10. Ditto ditto. 
— 16. Ditto ditto. 
— 26. Ditto ditto. 
— 30. Ditto ditto. 
31. I went from home, leaving it in the care of a friend. 
Sept. 17. Water changed; the animal being alive. A few days after 
this, the water was observed to be cloudy, and the 
animal was found dead and putrid. 
This is quite conclusive; and the animal’s surviving so long as 6, 7, 
and 10 days without even a change of water, leaves not the smallest 
possibility of cavil. Yet this is the last of a series of experiments so. 
similar in every point to Nos, 1, 2,3, 8, 9, 10, 11, 12, and 13 of those 
above recorded of the Melampodes, that it is only necessary to substitute 
the word Pedipes for Melampus in them as they stand. Pedipes has 
the same habit of remaining fixed above the surface of the water, and of 
crawling out of the glass if left at liberty to do so; has a precisely 
similar orifice in the mantle on the right side, which it opens when taken 
out of the water; has always the air-bubble at the mouth of this orifice 
when beneath it; and except in one instance (Experiment 14) has always 
died on the third or fourth day of confinement below the surface. Setting 
then aside one instance, there is no stronger reason to prove that Pedipes 
belongs to the Pectinibranchia than that Melampus does. Yet this single 
instance fortunately removes all farther question as to Pedipes: and all 
this serves to corroborate the same decision respecting Melampus. 
Férussac enumerates four speciesof Pedipes; but his third, Ped. Ovulus, 
seems from his short remarks upon it scarcely to belong to the genus; for 
he describes it as smooth and polished, and wanting the internal rib or 
double tooth within the outer lip. In Mr. Sowerby’s rich cabinet, I have 
also seen two species of the genus, both apparently distinct from Ped. afra; 
and these, as well as the rest of Férussac’s species agree in the presence 
of the spiral série, and the rib-like tooth or fold inside the outer lip. 
