344 Proceedings of the Royal Physical Society. 



similar in its general appearance to T. Bradyi, but there are 

 a few structural differences, one of the most important being 

 the three-jointed inner branches of the first pair of thoracic 

 feet : in T. Bradyi these branches are ouly two-jointed. 



Genus (83) Leptopsyllus, T. Scott, 1894. 



196. Leptopsyllus typicus, T. Scott. 



1894. Leptopsyllus typicus, T. Scott, Twelfth F. B. Rept., pt. iii. 



p. 254, pi. ix. figs. 2-11. 



Hab. — West of Queensferry, washed from lumps of hardened 

 mud, which were composed for the most part of the agglutin- 

 ated tubes of a species of Sabella, collected 25th January 

 1894; rare. 



197. Leptopsyllus Robertsoni, T. and A. Scott. 



1895. Leptopsyllus Robertsoni, T. and A. Scott, Ann. Scot. Nat. 



Hist. (January 1895), p. 30, pi. ii. figs. 1-14. 



Hab. — In pools between tide-marks at Musselburgh, 20th 

 August 1894; rare. 



198. Leptopsyllus minor, T. and A. Scott. 



1895. Leptopsyllus minor, T. and A. Scott, op. cit., p. 31, pi. ii. 

 figs. 15-22. 



Hab. — In pools between tide-marks at Musselburgh, taken 

 at the same time as L. Robertsoni; moderately rare. 



199. Leptopsyllus intermedins, T. and A. Scott. 



1895. Leptopsyllus intermediits, T. and A. Scott, Ann. and Mag. 

 Nat. Hist. (6), vol. xv. p. 51, pi. v. figs. 1-11. 



Hab. — In pools between tide-marks at Musselburgh, in 

 company with L. minor, L. Robertsoni, and a few of the other 

 rare things mentioned elsewhere in this Catalogue. This 

 species appeared to be rather more frequent than the other 

 two. 



Genus (84) Paramesochra, T. Scott, 1892. 



200. Paramesochra dubia, T. Scott. 



1892. Paramesochra dubia, T. Scott, Tenth F. B. Report, pt. iii. 

 p. 252, pi. xii. figs. 18-32. 



Hab. — Dredged off the west side of May Island in February 



