of the Fishery Board for Scotland. 461 



In the fifth pair the basal joints are broadly foliaceous and sub- 

 triangular in outline, with the apex truncate and provided with four 

 spiniform setae, the outermost of which is very small ; the secondary 

 joints are long, narrow, and cylindrical, being about four times longer 

 than broad, the extremity, which is obliquely truncate, carries several 

 setae, the two inner ones being longer than the others (fig. 17). 



The caudal furca are shorter than the last abdominal segment ; the 

 furcal setae are elongated (fig. 19). 



Habitat.— Station VI. (off St. Monans), Firth of Forth, dredged on 

 July 8th, 1901. The species is apparently very rare. (For drawings of 

 what may be the male of this species, see PI. XXII., figs. 36-42, and 

 PI. XXIII., fig. 1.) 



Remarks. — in some respects Ameira propinqua comes rather near to 

 Ameira longiremis, T. Scott, the fifth feet especially being very similar 

 to those of that species, as well as to those of Ameira longipes, Boeck, 

 but the structure of the antennules and of the first pair of feet separate 

 it distinctly from both the species named. 



Pseudotaehidius coronatus, T. Scott 



1898. Pseudotaehidius coronatus, T. Scott, 16th Ann. Kept. 

 Fishery Board for Scot., pt. iii., p. 267, pi. xiii., figs. 12-26 ; 

 pi. xv., figs. 1-4. 



This distinct species has been obtained in a gathering of small 

 Crustacea dredged in Loch Etive in 55 to 65 fathoms on September 

 17th, 1901. Pseudotaehidius coronatus has not previously been recorded 

 out of the Clyde district. 



Pterinopsyllus insignis, G. S. Brady. 



1868. Lophophorus insignis, G. S. Brady, Mon. Brit. Copep., 

 vol. i., p. 122, pi. xiii., figs. 1-10. (See also op. cit., vol. iii., 

 p. 23, where the generic name is changed to Pterinopsyllus, 

 — " Lophophorus "being preoccupied.) 



This fine species was obtained in the same gathering as the Pseudo- 

 taehidius just recorded, and appears to be the first record of it from the 

 West of Scotland. It has in previous years been obtained in the Firth 

 of Forth and the Moray Firth. Although Pterinopsyllus insignis and 

 Pseudotaehidius coronatus have a general resemblance to one another 

 they may be readily distinguished by the difference in the lengths of the 

 antennules — those of the first-named species being distinctly longer 

 and more slender than in the other. 



Mesochra macintoshi, T. and A. Scott. 



1895. Mesochra macintoshi, T. and A. Scott, Ann. and Mag. Nat. 

 Hist., (6), vol. xv., p. 53, pi. vi., figs. 1-7. 



Mesochra macintoshi, which was first observed amongst a number of 

 peculiarly slender copepods collected on the south shore of the Firth of 

 Forth near Musselburgh, has lately been obtained at Station VI. (off St. 

 Monans). It is apparently a rare species, but being one of those forms 

 wdiich live upon the bottom it may from its small size be easily over- 

 looked. 



Pseudomesochra, T. Scott (gen. nov). 



This genus is somewhat intermediate between Mesochra, Boeck, and 

 Cletodes, G. S. Brady. The antennules (anterior antennae) are composed 



