CONCHOLOGICAL WRITINGS. 95 



Todarus argo, as it differs from Loligo by the 2 superior Antenopes 

 having a cuneiform wing or broad membrane, yet it has the body 

 of Loligo, with 2 posterior round wings, and an internal Aploste, 

 linear subulate thin and flexible. 



This animal is exactly of the size and flexible shape suitable to 

 enter the Argonauta and dwell therein : although I never was sure 

 that it was the real producer of the shell — the fishermen asserted it, 

 it is met floating with it and using its 2 winged feet as sails, I had 

 it caught and brought to me with its black eggs filling the bottom 

 of the shell — and yet I never was positive as to being the real 

 mysterious Argonauta. I was once inclined to believe it, but the 

 animal was so different from that described by Montford and others, 

 its body was so unlike the fluted shell, that I always had great 

 doubts. 

 [65] 



It is well known that many shells of Argonauta are blackened in 

 their inner apex : this happens by the black eggs laying there, 

 although the Todarus has not the ink bag of the real Loligos, yet 

 it emits a kind of dark liquor and its eggs are blackened by it. I 

 incline to believe that it uses the shell as a home, boat and nest, at 

 the time of laying eggs, and changes the shell yearly. It has no 

 kind of adhesion to it, and may be entirely withdrawn with ease. 



I give here the figures of both Ocythoe and Todarus argo. This 

 last is fulvous grey above, white beneath, body oblong sihooth, 2 

 rows of alternate cupules on the antenopes that are shorter than 

 body, but promuscides as long without cupules. 



A third Genus medial between these two was found by me in the 

 Atlantic Ocean in 1815, and I procured 2 sp. of it, both pelagic, 

 floating at the surface. I called it Canopus then, but this name 

 being employed I have changed it to Anisoctus mg 8 unequal. 



G. Anisoctus Raf. dilTering from Octopus by body as Loligo with 

 a very small subulate aploste (internal bone) but 8 unequal Ante- 

 nopes, as in Octopus. 



1. Anisoctus punctatus Raf L. body whitish dotted of brown, 

 Antenopes cylindrical coiled at the end, 2 longer, 2 shorter, cupules 

 alternate — 5 inches long. 



2. Anisoctus 6«coZor Raf. -body bay above, white beneath, ante- 

 nopes trigone acute nearly equal cupules alternate — 1 inches long. 



Figure 50, Ocythoe tuberculata. 



