

joint well defined, but of a rather different shape, being produced immediately 

 inside the tip to a strong spiniform process, inner expansion of proximal joint 

 with only 3 marginal setse, the innermost one spiniform. 



Colour not yet ascertained. 



Length of adult female 0.90 mm. 



Remarks. The above-described form is evidently that briefly recorded 

 by Th. Scott as T. malleolata Brady. It cannot, however, be referred to 

 that species at all, as the structure of the last pair of legs is very unlike that 

 in the type species, and Th. Scott has also called attention to this essential 

 difference. I propose to name the species in honour 'of that distinguished 

 naturalist. 



Occurrence. -Only a few specimens of this form have come under my 

 notice. They were found in samples taken last summer at Korshavn from depths 

 of about 20 fathoms, sandy bottom. 



Distribution. Scottish coast (Scott). 



Gen. PterOpSyllUS, Scott 1906. 



Generic Characters. General form of body resembling that in Phyllo- 

 podopsyllus. Rostral projection, however, very prominent and acutely produced 

 at the tip. Genital segment in female very large and somewhat depressed. 

 Caudal rami narrow linear in form. Anterior antennae with the 1st joint much 

 elongated, but without any unguiform projection outside. Posterior antennae very 

 slender, with the outer ramus rudimentary. Oral parts resembling on the whole 

 in structure those in the genus Phyllopodopsyllus. 1st pair of legs with the inner 

 ramus much longer than the outer, and distinctly 3-articulate. The 3 succeeding 

 pairs of legs all of essentially same structure, being rather small, with the inner 

 ramus somewhat shorter than the outer and biarticulate; natatory setse much 

 reduced in number. Last pair of legs in female very large, forming together, 

 as in the genus Phyllopodopsyllus, beneath the urosome a roomy incubatory 

 chamber, each, however, composed of 2 well-defined lamellar joints; those in 

 male very small, uniarticulate. 



RemarJcs. This genus, established by Th. Scott, is nearly allied to Phyl- 

 lopodopsyllus, but differs conspicuously in the shape of the rostrum and the caudal 

 rami, as also in the structure of the antennae and legs. Only a single species 

 is as yet known. 





