CLASS r. CRUSTACEA. 79 



** With a rosfrwn, hit no juzos : anten?i{E two. 

 Genus (?. CALIGUS, MiUL, Lafr., Bosc, Leach. 



Shell coriaceous-memljranaccoiis, bipartite; the anterior segment in- 

 versely cordiform, very deeply notched behind (the notch receiving 

 the hinder segment, which is round), the anterior part subproduced, 

 notched ; the laciniee at their base externally bearing antenna' : an- 

 tennce biarticulate, the first joint thickest, the second with a simple 

 seta at its extremity : abdomen narrower than the thorax, with its base 

 contracted and bearing the hinder legs, its extremity on each side 

 with a rounded process of" the length of the body: 7-ostrum rounded, 

 rather more slender towards its apex, which is obtuse : legs fourteen, 

 anterior; second and fourth pairs with a strong claw; the second 

 pair short; the third slender, elongate, the last joint double, with 

 unequal lacinia;; the fifth, with the last joint on one side setose, tlie 

 sette ciliated on each side; the sixth with a dou])le triarticulated tar- 

 sus, the last joints on each side setose, the sette ciliated on each side; 

 the seventh pair with its last joint trifid: the hinder segment of tlie 

 thorax beneath, terminated by a large broad lamella, ciliated behind. 



Sp. 1. Cat. Midleri. Leach, Encycl. Brit. Supp.,vol. 1. Fl. 20. 



Inhabits the common cod-fish. 



Genus 3. PANDARUS, Leach. Camgus, Midi, Lafr., Bosc. 



Shell coriaccous-membranaceous, composed of but one part, deeplj 

 notched behind; the angles acute; the middle of the notch toothed 7 

 anteriorly narrower, rounded, with a process on each side externally 

 bearing the anteunre: antenmc composed of two joints, the secoipi 

 joint terminated by several setaj : abdomen somewhat narrower than 

 the shell, the base above with two transverse lamella^, tlie first <£ 

 which is four-lobed, the second bilobate: the apex notched, with twQ 

 filaments longer than the body, with a lamella at their base above-: 

 rostrum elongate, attenuated, inserted behind the anterior legs : legs 

 fourteen; anterior pair short, terminated by a short claw, and arising 

 from beneath an ovate process; second pair with a double, unequal 

 tarsus ; third pair without any determinate form, without any claAv; 

 fourth pair bifid; fifth and six pairs bifid, their coxse connected by a 

 lamella; seventh pair bifid, the exterior lacinia longest, with a notcli 

 externally towards its apex. 



Sp. 1. 'Fund, bkolor. Shell and the middle of the abdominal lamells 

 black; tail with filaments double the length of the body. 



Pandarus bicolor. Leach, Encycl. Brit^ Siipp. vol. 1. PL 20. 



Inhabits the Squalus galeus of Linne. 



Genus 4. ANTIIOSOMA, Leach. 

 Shell coriaccous-membranaceous, unipartite, rounded before andbehind- 

 the anterior part as if uni-lobate, the lobe higher than the shell, be- 

 hind on each side, bearing the aiitcnnec : anicnnci si-x-jointed : ub((t^ 



