CALIGIDiE. 
259 
standing this, his description of the genus and the two 
species which he gives is better than any that had as yet 
appeared. 
Geoffroy described and figured, in his ‘Insectes de Paris/ 
1764, a small crustacean, under the name of Binoculus 
hamisphcericus. It bears some resemblance to a Caligus, 
and Linnaeus, in the ‘ Syst. Nat,/ twelfth edition, quotes 
it as a synonym for his Monoc. piscinus. This is repeated 
by Fabricius, in his work already quoted, ‘ Entomologia 
Systematica/ 1793, and in the Supplement to the work, 
1798. It is not, however, a Caligus, but a different 
genus altogether, to which Latreille has given the name 
of Prosopistoma. Manuel, in the ‘ Encyclopedic method./ 
1792, avoids this faulty reference, but falls into the error 
of his predecessors with regard to the Argulus. 
Cuvier mentions the Calygus in his ‘ Tableau ele- 
mentaire/ 1798; and Latreille, in his ‘Hist. Nat. Crust, 
et Ins./ 1802, presents us with a lengthened account of 
the genus, giving all the details made known to us pre- 
viously by Muller and others. Risso, in his ‘ Hist. Nat. 
des Crust, des Envir. de Nice/ 1816, and in his ‘Hist. 
Nat. de l’Europe merid./ 1826, mentions several species 
belonging to the Caligidae ; Tilesius, in a paper in the 
‘ Mem. de l’Acad. Imp. des Scien. de St. Petersbourg/ 
1815, details at some length Muller’s two species, and 
adds some interesting notices of a number of creatures 
allied to this family, as connected with the luminosity of 
the sea ; and Lamarck, in the first edition of his ‘ Hist. 
Nat. des Anim. sans Verteb./ 1818, describes shortly the 
few species previously made known to us. Amidst this 
host of continental authors, no British zoologist appears, 
with the exception of Dr. Leach. In his article “ Crus- 
taceology,” in the ‘Edinburgh Encyclopaedia/ 1814; in 
his article “ Annulosa/’ in the Supplement to the ‘ Encyc. 
Britann./ 1816 ; and still later, in the article “ Entomos- 
traca,” in the ‘Diet, des Scien. Nat./ 1819, he describes 
the genus, and introduces, apparently for the first time, 
a British species. 
