338 
SHARK’S EYE. 
Bructeola simplex ad singulum florem, vix manifesta. 
Calyx parvus, quinque-dentatus, persistens pilosus. 
Corolla monopetala, infundibuliformis. Tubus calyce longior cylindraceus 
sursum ampliatus. Faux villis mollibus subclausa. Limbus quinque-par- 
titus : laciniis lanceolatis acutis introrsum rubescentibus subrevolutis tubo 
sub®qualibus. 
Stamina. Filamenta quinque, brevissima, fauci corollas inserta. Anther® 
parvae, lineares erect® apice pubescentes. 
Pistillum. Germen inferum subrotundum. Stylus teretiusculus erectus 
longitudine tubi. Stigma crassiusculum bipartitum. 
Pericardium. Bacca coerulea, subovata, laevis, calyce coronata, unilocu- 
laris. Semina duo, coalita, oblonga, utrinque acuta, introrsum plana, ex- 
trorsum gibba. 
Page 24. — Shark’s Eye. 
The eye of the shark which I have mentioned in the text, was detached 
from the socket before it came into my possession, and did not enable me 
to obtain any very precise information respecting its very beautiful and 
complicated apparatus. Since sending that part of my work to the press, I 
have been presented with a preparation of a shark’s eye, with most of its 
appendages, in spirit, by Mr. Radkin, the assistant surgeon of the Lyra, 
who never lost the opportunities afforded him by his commander of examin- 
ing the structure of any singular or interesting animal taken on board the 
Lyra, He accompanied the preparation with the following notice of the 
organization of the shark’s eye, and his permission to publish it in this 
Appendix. The Squalus Carcharias was the subject of Mr. Radkin’s exa- 
mination j and the following is his account of the structure of its visual 
organ : - — “ On dividing the skin around the eye, I found a great quantity 
of watery fat lining the socket, on removing which I obtained a view of 
the muscles of the eye. The most external, which from its use might 
be called Levator Squammce Oculi, arises from the upper and back part 
of the skull near its junction with the vertebr®, takes a course down- 
wards and forwards, passes over a small groove in the end of a jugular pro- 
cess, is retained in the groove by a ligament, and is inserted tendinous into 
a cartilaginous covering for the eye. Its use is to pull up this covering, 
situated as a lower eyelid. 
