36 BRITISH COPEPODA. 
tail setze are a good deal swollen at the base (fig. 14). 
Ovisac curvate, containing a small number of large 
ova ranged in a single layer. Length z oth of an 
inch (°85 mm.). 
Hab.—Dredged in depths varying from ten to 
thirty-five fathoms, off Marsden on the Durham Coast, 
off Red Chiff, Staiths, and Robin Hood’s Bay (York- 
shire) ; off Callum’s Hole, Bute ; Glen Sannox, Arran ; 
St. Mary’s, Scilly; and Clew Bay, Ireland. 
This agrees very closely with the somewhat scanty 
details of character noted by Dr. Claus for Cantho- 
camptus rostratus, but if that species really belongs to 
the genus Canthocamptus as defined by Dr. Claus 
(having the fourth foot only 2-jointed), it cannot be 
the same as the form now under consideration. With 
this uncertainty I retain my own specific name, 
though, if the two forms are really identical, the 
term rostrata should have the preference on account 
of priority. 
Genus 10. Amutra, Boeck (1864). 
Anterior antenna 8-jointed; inner branch of posterior 
antenna small, l-joited. Mandible-palp small, 1- 
or 2-branched. Branches of all the swimming-feet 
3-jointed; outer branch of the first pair short; 
inner branch long, the first joint especially much 
elongated. 
