54 A HISTORY OF RECENT CRUSTACEA 
Go 
id 
large and curved third pair of claws, and, while with its 
ventral surface it covers the top of the tongue, it projects 
beyond the apex of it with its first pair of feet, so that 
the mouth of the fish can hardly be closed. The male, as 
usual, many times smaller than the female, is often found 
covered by her tail and ventral surface.’ Though this 
species appears to be confined to the Atlantic, Glossobius 
laticauda (Milne-Edwards) pays the same amiable atten- 
tions to the flying-fishes of the Pacific, and Glossobius 
auritus, Bovallius (see Ceratothoa auritus, Plate XV.), is 
reported both from the Atlantic and the ‘ Indian Seas.’ 
Ceratothéa, Dana, 1852, includes twelve species, in 
some of which the male is very much smaller than the 
female. Ceratothoa Banksu (Leach) is identified with the 
Pediculus marinus of Seba. Miers finds that it is also the 
same as the Oniscus imbricatus, Fabricius, the type of 
which is in the British Museum from the collection of Sir 
Joseph Banks. The name PHanksi is therefore superseded 
by wmbricatus. Hansen notes as a singular circumstance 
that in the second stage of the young of this species the 
fifth pleopods carry hooks, which are absent from that 
pair in the adults of this whole group. Ceratothoa crassa, 
Dana, is, according to Dr. Bovallius, a Glossobius. It is 
worth remarking that, though the genus Ceratothoa is 
accepted as Dana’s, he is not cited as an authority for a 
single one of the accepted species. On the other hand, his 
Ceratothoa linearis is transferred to Glossobius, and his 
Ceratothoa crassa by Schiddte and Meinert is called Glos- 
sobius laticauda (Milne-Kdwards), and by Bovallius Glos- 
sobius crassus (Dana). It would appear, therefore, that 
Glossobius is really a synonym of Ceratothoa, and that a 
new generic name is required for the species that have 
been assigned to Ceratothoa. For this purpose Meinertia 
may be fitly proposed. 
Cymothoa, Fabricius, 1793, still has seventeen species, 
after the successive restrictions to which it has been sub- 
jected. Of Cymothoa eremita (Briimnich) the Copenhagen 
Museum has specimens still adhering to the tongues of the 
fishes on which they were originally taken, showing that 
