CETJSTACEA. 
123 
Dynahen’e eubra. — Loach, Diet. Sci. Nat., xu, p. 344. — Bate and 
Westwood, p. 419. 
Occurs all round our coast. 
Dtstamen'e montagui. — Leach, Diet. Sci. Nat., xii, p. 344. — Bate 
and Westwood, p. 423. 
We have taken it among fuci between tide marks in Cornwall. 
It is tolerably common associated with other allied forms all 
round our coast, on rocky beaches. 
Genus, Cymodocea. — Leach. 
Like Bynamene, but with a tooth in the centre of the emargin- 
ation in the middle of the tail. 
Cymodocea emarginata. — Leach, Diet. Sci. Nat., xn, p. 343. — 
Bate and Westwood, p. 428. 
Dr. Leach took his specimen at Plymouth, under Mount Batten. 
Mr. John Cranch found specimens less strongly granulose, at 
Falmouth. 
Genus, N^sa. — Leach. 
Like Cymodocea, but with the sixth segment of the body dorsally 
produced into a strong bidentate process. 
Nassa bidentata. — Adams, Trans. Lin. Soc.,vol. v, p. 812,/. 3, 4 
Bate and Westwood, p. 431. 
Common probably all round the south western coast of 
England, including the rocky shores of Cornwall, where it has 
been found. 
Genus, Campecopea. — Leach. 
Six segments, and with a single long dorsal tooth in the male. 
Campecopea hirsuta. — Montagu, Trans. Lm., vii, p. 71, t. 5,f. 8. 
Bate and Westtvood, p. 434. 
This species was found by Montagu on the coast of Devonshire. 
We have taken it in some profusion at Torquay and Polperro, 
amongst the small dry fuci that exist on the surface of the rocks 
within reach of the spray of the sea, but where the sun appears 
fo drain off all moisture. 
Campecopea ceanchii. — Leach, Bict. Sci. Nat., xii, p. 341. — Bate 
and Westwood, p. 436. 
Found with the preceding, and is probably the female. Taken 
at Falmouth, as well as plentifully mingled with the former 
Species in the localities named. 
