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APPENDIX, No. II. 
Observations on the Genus Ocy THoE of Rafinesque, with a Descrip- 
tion of a new Species. By Witi1am Exvrorp Leaca, M. D. 
F. R.S. 
From the Philosophical Transactions. 
Pury, AtpRovanDus, Lister, RumpHius, D’ARGENVILLE, 
Brueurere, Bosc, Cuvier, and Suaw, have described a spe- 
cies of this genus, that is often found in the Argonauta argo 
(common paper-nautilus), and which they have regarded as its 
animal, since no other inhabitant has been observed in it. 
Sir Josepu Bawks, and some other naturalists, have always 
entertained a contrary opinion, believing it to be no more than 
a parasitical inhabitant of the argonaut’s shell, and Rari- 
NESQUE, (whose situation on the shores of the Mediterranean, 
has afforded him ample opportunities of studying this animal, 
and of observing its habits) has regarded it asa peculiar ge- 
nus, allied to the Polypus* of Aristotle, residing parasitically in 
the above mentioned shell. 
Dr. BLAINVILLE, ten months since, when speaking of the 
Argonauta, said, “ animal unknown,” and he has lately informed 
me, that he has written a long dissertation to prove, that the 
Ocythoé of Ra¥FINESQUE, does not belong to the shell in which 
it is found. 
The observations made by the late Mr. Joun Crancn, zoo- 
logist to the unfortunate Congo expedition, have cleared from 
my mind any doubts on the subject. In the gulf of Guinea, 
* Sepia octopedia Linne’. 
& 
