184 Dr. Wilh. Giesbrecht on 
Genus 12. PTEROPONTIUS, gen. nov. 
Thoracic and anterior abdominal segments produced late- 
rally into large angular processes. First body-segment 
with dorsal crista, reaching from frontal to posterior margin. 
Rostrum triangular. Anterior antenne of 2 8-,of g 10- 
jointed. Posterior antenne 3-jointed. Tube of siphon reaches 
to the posterior foot-jaws. Fourth foot destitute of inner 
branch. Branches of first foot 2-jointed. Fifth foot knob- 
like. 
21. Pteropontius cristatus, sp. n. 
Distr. Naples. 
Genus 13. GALLOPONTIUS, gen. nov. 
Thoracic segments produced laterally into processes. Fore- 
head with dorsal cap-like convexity. Rostrum prominent. 
Anterior part of genital segment of 2 broader than posterior. 
Anterior antenne of 2 9-, of ¢ 11-jointed. Posterior an- 
tenn 4-jointed. Tube of siphon thick, rippled inside, and 
reaching beyond the fourth foot. Inner branch of fourth foot 
wanting. Fifth foot knob-like. 
22. Gallopontius fringilla, sp. n. 
Distr. Naples. 
Genus 14. Dyspontius, Thorell, 1859. 
Thoracic segments produced laterally into processes. "Xos- 
trum not prominent. Anterior part of genital segment of 9 
broader than posterior. Anterior antenne of 2 9- to 10-, of 
3 10- to 11-jointed. Posterior antenne 4-jointed. ‘Tube of 
siphon reaches between foot-jaws and third foot. Inner 
branch of fourth foot wanting. Fifth foot knob-like. 
23. Dyspontius striatus, 'Thorell. 
Dyspontius striatus, Thorell, Sv. Vet.-Akad. Handl. Stockholm, vol. iii. 
. 81, t. xiv.; ? Norman, Rep. Brit. Assoc. 1866, p. 198; ? Brady, 
Mon. ui. p. 66, t. xcii.; ? I. C. Thompson, Proc. Lit. & Phil. Soe. 
Liverpool, vol. iii. p. 189; ? Canu, Cop. Boulonnais, p. 266, t. xxviii. 
@. Length 1:25 millim. Cephalothorax rather broader 
than long. Furca rather longer than broad, less than half as 
long as the last abdominal segment. Anterior antenne 9- 
jointed ; first and second joint long. ‘Tube of siphon reaches 
to the third thoracic segment. Inner lobe of maxilla scarcely 
