228 ANNALS OF SCOTTISH NATURAL HISTORY 



Forth, Aberdeen Bay, and the Moray Firth. It is one of the species 

 recorded by Thomas Edward, of Banff, and the Rev. A. M. Norman 

 has recorded it from Shetland, but it has not yet been observed in 

 the Clyde, nor do I know of any record of it from any place on the 

 west of Scotland. 



CRANGON FASCIATUS, Risso. In this species the rostrum is 

 comparatively short and broad, with an abruptly truncate apex, in 

 fact the apex, instead of being rounded, is sometimes slightly concave. 

 The carapace bears a single central spine, situated a short distance 

 behind the base of the rostrum : " on either side of the spine and 

 between it and the margin are three slight lobe-like folds. Between 

 this portion of the carapace and its hinder margin is a deeply-cut 

 sulcus, arching forwards at the sides. There are two transverse 

 bands of dark brown, one across the fourth segment of the abdomen 

 and the other across the telson and uropods." 1 



This is apparently a rare species in the Scottish seas. I know 

 of only two localities where it has been obtained ; these are Shet- 

 land, where five specimens were obtained by the Rev. A. M. 

 Norman in 1868; and off Musselburgh, Firth of Forth, where two 

 specimens were captured in four to five fathoms. 2 It is a small species ; 

 the specimen recorded by Prof. Bell measured six-tenths of an inch 

 (15 mm.) in length, but the Musselburgh specimens measure scarcely 

 more than 10 mm. 



CRANGON NEGLECTUS, G. O. Sars. The rostrum in this species, 

 as in the last, is moderately broad, but instead of having the apex 

 abruptly truncate, it is distinctly and evenly rounded. The carapace 

 has a single central spine situated as in C. fasciatus, and a " second 

 small tubercle-like spine on the central line behind it"; but the 

 lobe-like folds are wanting, while " the sulcus which in that species 

 defines their lateral regions is much less distinct and deep." This 

 species, like the previous one, has the fourth abdominal segment, 

 and the telson and uropods, adorned with transverse coloured bands, 

 but they are more of a chestnut colour than dark brown. 



This small species was first observed in Loch Tarbert (Loch 

 Fyne) in 1886, and afterwards in Largo Bay, Firth of Forth, in eight 

 to nine fathoms, in 1891. One of the Largo Bay specimens in my 

 collection measures about 18 mm. from the apex of the rostrum to 

 the end of the tail. In part iii. of the "Nineteenth Annual 

 Report of the Fishery Board for Scotland," p. 278, I have recorded 

 this species from the Bay of Nigg and the Moray Firth ; this was an 

 error, for these specimens were really referable to Crangon trispinosus, 



CRANGON NAN us, Kroyer ( = C. BISPINOSUS, Uatisfone, of Bell's 

 "British Stalk-eyed Crustacea"). In this species the rostrum is 



1 See Norman's paper in the " Fourth Annual Report of the Fishery Board 

 for Scotland," 1886, i. p. 156. 



- " Ninth Annual Report of the Fishery Board for Scotland," 1891, iii. p. 309. 



