312 GASTEROPODES. 
panion in the same vessel, from the bristling up of the branchie, and biting 
each other as they met, led to conjecture that it was from violence. On 
the Ist of October a papilla, rather cylindrical than conical, indicated 
renovation of the tentaculum ; and a low prominence denoted the origi- 
nating corniculum. Both the organs had regained half their natural 
dimensions on the 31st, and were tipped with white. 
Some of the other specimens also suffered mutilations of the tenta- 
cula, and conical papillze subsequently arose from the stumps. But the 
preceding animal suffered most, for, besides complete privation of a ten- 
taculum and corniculum, it lost a fragment of the posterior extremity of 
the body on the 9th of September, which remained still indented, instead 
of being pointed, on the 25d. None of the whole specimens survived 
long enough to admit redintegration of the defective parts. 
The exhaustion concomitant on the profuse spawning of the prolific 
specimen above described enfeebled it so much, that, rejecting sustenance, 
and losing the adhesive faculty, it died, having shrunk to a third of its 
original dimensions. 
The survivance of no specimen exceeded eleven or twelve weeks. 
This animal is rare; but about fourteen years after the preceding 
colony was taken, a small specimen, not extending above three lines, oc- 
curred, which reposed constantly supine in quiescence under the surface 
of the water. Its survivance was short. 
After the lapse of other fourteen years, one occurred of larger 
dimensions, being about equal to the size of the largest of the former 
colony. ‘The general disposition of all these animals was in correspon- 
dence. 
Prats XLV. 
Fic. 4. Eolis hystriv. 
5. The same, slightly enlarged. 
6. Spawn. 
12. Eoris purpurEA—The Purple Eolis—Plate XLV. Figs. 19, 20. 
Hitherto our attention has, with few exceptions, been’ directed to 
those species of the Kolis having the anterior of the shoulder or sole 
