the Copepod Family Ascomyzontide. 177 
6. Dermatomyzon nigripes, Brady and Robertson. 
Cyclopicera nigripes, Brady, Mon. iil. p. 54, t. Ixxxix.; Th. Scott, Tenth 
Rep. Fish. Boatd Scotland, p. 267; I. C. Thompson, Trans. Lit. 
& Phil. Soc. Liverpool, vol. vil. p. 36. 
? Ascomyzon Thorelli, Sars. Arch. Math. Nat. vol. iv. p. 474. 
? Cyclopicera nigripes, Sars, Norske Nordh. Exp., Crust. ii. p. 79 
Length of @? 1:2-1:25 millim. Swimming-feet smoky 
black. First joint of anterior antenne with a long sharp 
spine. 
Distr. British seas ; Spitsbergen ? 
7. Dermatomyzon elegans, Claus *. 
Dermatomyzon elegans, Claus, Arb. Wien, vol. viii. p. 351, t. vi.; Canu, 
Cop. Boulonnais, p. 260, t. xxvi. 
Length of 2 1-1°35, of g 0°9-1 millim. Feet colourless. 
First joint of anterior antennz with seta. 
Distr. 'Triest; English Channel; Naples. 
Genus 4, CLAUSOMYZON, gen. nov. 
Thoracic segments laterally rounded off. Abdomen of 2 
4-, of g 5-jointed. Anterior antenne of 2 20-, of @ 
?-jointed. Hxopodite of posterior antenne shorter than penul- 
timate joint. Siphon without tube. Mandible denticulated 
at the oblique apex; palp reduced to a rather short plumose 
seta. Sete of maxilla (probably) not plumose. ‘Terminal 
joint of fifth foot curved, elongated, bluntly serrated at the 
apex. 
8. Clausomyzon gracilicauda, Brady. 
Cyclopicera gracilicauda, Brady, Mon. iii. p. 58. t. Ixxxiii.; I. C. 
Thompson, Trans. Lit, & Phil. Soc. Liverpool, vol. vii. p. 36; 
Th. Scott, Tenth Rep. Fish. Board Scotland, p. 262. 
Ascomyzon comatule, Rosoll, Sitzungsb. Akad. Wien, vol. xcvii. p. 189, 
4.1. 
Distr. British seas; ‘Triest. 
Genus 5. RHYNCHOMYZON, gen. nov. 
2. Thoracic segments produced laterally into processes, 
which are directed backwards and conspicuous in dorsal 
* Dermatomyzon gibberum, Th. & A. Scott (Ann, & Mag. Nat. Hist. 
ser. 6, vol. xiii. p. 144, t. ix.) and Th. Scott (Twelfth Rep. Fish. Board 
Scotland, p. 260, t. x.), from the Firth of Forth, having only three abdo- 
minal segments, should be excluded from the genus Dermatomyzon ; the 
species agrees in this respect with Cyclopicera and Asterocheres. 
Ann. & Mag. N. Hist. Ser. 6. Vol, xvi. 12 
