KEMORA. 
117 
of Ireland.” It is contained in a letter from Dr. E. Ball, of 
Dublin, who says that on the 29th. of July, (1848,) Mr. N. A. 
Nicholson brought to him a fresh specimen of this fish, which 
he found adhering to the gills of a large Shark, which he had 
captured in Dublin Bay on the preceding night; where it was 
observed in shallow water, and driven on shore. A second 
Remora adhered to the gills at the opposite side, but when 
disturbed it made its way inwards by the branchial orifices, and 
was not seen again. Dr. Ball afterwards obtained the fish on 
which the Remora was found, and it proved to be a Blue 
Shark, of the length of ten feet and an inch; but the second 
Remora was not discovered. 
The length of the specimen examined was four inches and a 
half; the figure stout on its anterior part; the head flat above, 
to afford space for the sucking disk; which reaches from the 
upper lip backward to almost the end of the pectoral fin — in 
form oval, and in this example with eighteen laminae — proceeding 
from a middle longitudinal ridge. The eyes prominent; under 
jaw protruding; cheeks full. Body more compressed from the 
pectoral fins, tapering nearer the tail. Pectoral fins round, and 
high; ventral fins thoracic. A slight ridge from the disk to 
the dorsal fin; which fin and the anal are opposite; tail concave. 
Colour brown, but its distribution is remarkable, the under 
parts being dark, and the dorsal parts lighter, as well the back 
itself as the dorsal fin. We have already seen that the form 
of the tail and number of laminaB of the disk are liable to 
variation. 
