40 



Occurrence. Some few specimens of this form were found last summer 

 in the Trondhjem Fjord, at Agdenaes. They occurred in a depth of about 50 

 athoms, on a bottom consisting of coarse sand. 



Distribution. Firth of Forth, Isle of Man (Scott). 



Gen. 10. PseildObradya, G. O. Sars, n. 



Syn: Bradya, Scott (part). 



Generic Characters. General form of body resembling that of Ectinosoma, 

 being more or less pronouncedly fusiform. Caudal rami often much elongated. 

 Anterior antennae comparatively short, with the proximal joints more or less ex- 

 panded. Posterior antennae with the outer ramus poorly developed and in some 

 cases consisting of only 2 joints. Anterior lip not forming any projection in front. 

 Mandibles and maxillae resembling in structure those in Ectinosoma. Anterior 

 maxillipeds generally very small, with the 2 basal joints bent at almost a right 

 angle, terminal part consisting of 3 well-defined, though very short joints carrying 

 comparatively short setae. 2 of which are generally spiniform. Posterior maxil- 

 lipeds less slender than in Ectinosoma. Last pair of legs generally very large, 

 lamellar, though somewhat varying in shape in the different species, distal joint 

 always well developed, appendicular bristle in some cases very strong and issuing 

 from the lower face of the proximal joint. 



Remarks. This new genus is established to include a number of species 

 referred by Mr. Scott to the genus Bradya of Boeck, chiefly on account of some 

 similarity in the structure of the posterior maxillipeds. These appendages are, 

 however, in reality not nearly so powerfully developed as in Bradya, and on a 

 closer comparison, several other differences in the anatomical details are found 

 to exist, which would seem to warrant the establishment of a separate genus, 

 somewhat intermediate in character between Ectinosoma and Bradya. Among these 

 differences may be mentioned the poor development of the outer ramus of the posterior 

 antennae, the somewhat different shape of the posterior maxillipeds and the very 

 highly developed last pair of legs. The caudal rami, moreover, in most of the 

 species, are unusually prolonged, and the general form of the body is rather unlike 

 that in Bradya, and much more resembling that in Ectinosoma. Of the 5 species 

 described by Mr. Scott and referable to the present genus, I have succeeded in 

 finding 2 off the Norwegian coast, and also a 3rd species which I regard as 

 new to science. 



