459 Dr. T. Scott on British Copepoda. 



distinct tooth-like process. Furcal joints moderately short, 

 inner margin lobate near the base. 



No males observed. 



Type species Phyllopodopsyllus Bradyi, T. Scott. De- 

 scribed in 1892 under the name of a Tetragoniceps Bradyi, 

 T. Scott," in the ' Tenth Annual Report of the Fishery Board 

 for Scotland/ pt. iii. p. 253, pi. ix. figs. 19-32. 



Remarks. — This species, which appears to be scarce, but 

 with a fairly wide distribution, has a close resemblance to 

 Tetragoniceps, Gr. S. Brady. The anterior antennae, however, 

 are composed of nine joints and it is the second (not the first) 

 joint that is strongly toothed. There is a difference in the 

 structure of the maxillae and first maxillipeds, but the most 

 obvious difference is in the structure of the fifth pair of thoracic 

 feet, which are so large and leaf-like that they enclose the 

 entire ovisac. The species is described and figured in the 

 Fishery Board Report referred to above. 



Genus Pteropsyllus *, T. Scott, nov. (PI. XI. figs. 7, 8.) 

 Syn. Tetragoniceps, T. Scott, in part, (not Tetragoniceps, G. S. Brady). 



Description. — This genus resembles in some respects the 

 one last described, as well as Tetragoniceps, Gt. S. Brady, and 

 seems to hold a somewhat intermediate position between 

 them. The anterior antennae are composed of eight joints; 

 the first is elongated, the second is shorter and has the upper 

 distal angle produced forwards into a tooth-like process, and 

 the fourth is provided with a sensory filament. Posterior 

 antennae apparently three-jointed ; outer ramus rudimentary, 

 consisting of a minute uniarticular^ joint. Mandible and palp 

 as in Tretrogoniceps. The maxillae and maxillipeds are also 

 somewhat similar to those of the same genus. Both branches 

 of the first pair of thoracic feet three-jointed; the first joint 

 of the inner branch is as long as the entire length of the outer 

 branch, but the second and third joints are small. The next 

 three pairs have the inner branches two-jointed as in Phyllo- 

 podopsyllus. In the fifth pair the basal joint is small, but the 

 secondary joint is large and foliaceous — large enough to 

 enclose the ovisac. Abdomen composed of four segments. 

 Furcal joints tolerably elongated. 



No male observed. 



Type species Pteropsyllus consimilis, T. Scott. Described 

 in 1894 under the name of " (?) Tttragoniceps consimilis" in 



* mfpov, a wing ; tyvWos, a flea : the fifth pair of thoracic legs being 

 wing-like. 



