CLASS I. CRUSTACEA. 
81 
and corallines, which fill the pools left by the tide in most of the 
rocky coasts of Europe. 
S P- 1. Ci/th. nindis. Shell reniform, velvety, and. green. 
Inhabits the European ocean. Is occasionally found on the shores of 
Scotland amongst fuel and conferva. 
division III. — Body covered neither by a bivalve shell nor shield. Eye one , 
sessile. 
Genus 8. CYCLOPS. Midi., Lam., Latr., Bose, Leach, 
Body ovate-conic, elongate: eye one, situate on the thorax: antenna. 
lour, simple : legs eight. 
All the animals of this genus inhabit fresh waters. The females 
Carry their eags in a pouch resembling a bunch of grapes on each 
side of the tail. The organs of generation of the male are placed in 
antenna’ : those of the female, beneath the belly, at the base of 
tll e tail, which is abruptly narrower than the abdomen. The antennee 
are hairy at the base of their joints. 
*P’ 1. Cyc, Geoffroyii, Tail straight and bifid; colour brownish. 
"lonoculus quadricornis. Lime, Fair. Cyclops quadricorms. Mall., 
■Latr., Bose. Cyclops Geoffroyii. Leach. 
Genus 9. POLYPHEMUS. Mull,, Latr. } Bose, Leach. Cepiialo- 
culus. Lamarck. 
Eye one, forming the head : legs ten ; two bifid, elongate, and extended 
horizontally. 
S P’ 1. Pol. Oculus. Body luteous, with a few blue spots. 
The only species known of this genus. It inhabits lakes and 
marshes; and is subject to very considerable variation in size and 
colour. 
division IV. — Body covered by neither a bivalve shell nor shield. Eyes 
pedunculated. 
Genus 10. Bit ANCIIIOPODA. Lam., Latr., Bose, Leach, 
filiform and very soft: head divided from the thorax by a very 
narrow but distinct neck: eyes two, lateral: antenna two, short, two- 
jointed, capillary, inserted behind and above the eyes: front with two 
moveable processes (which are broader towards the apex in the male 
s «x), that are notched, those of the female furnished with a papilla at 
their point. The organs of generation are situate at the base ot the 
tail. ° 
S P- 1. Br. stagnalis. Body transparent, of a light brown colour, slightly 
tinged with green or blue, particularly on the head and legs. 
Cancer stagnalis. Lmnt. An interesting account ot this species is 
given by° the late Dr. Shaw in the Transactions of the Linneun Society 
°f London, vol. i. 
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