383 Part III. — Eighteenth Annual Report 



Eucalanus elongatus (Dana). 



1849. Galanus elongatus, Dana, Proc. Amer. Acad. , vol. ii> p. 18. 



A single specimen — a female — was obtained in the same gathering with 

 the last. This is a larger species than Eucalanus crassus ; the specimen 

 referred to here measured fully 6mm. in length (about a quarter of an 

 inch). In this species the last thoracic segment has the sides produced 

 posteriorly into short pointed processes. The presence of Eucalanus 

 elongatus in the Moray Firth is also of interest as bearing on the question 

 of the distribution of species. These copepods are probably carried into 

 the estuary by regular tidal currents or by temporary currents set up by 

 the wind, should it happen to blow from one particular direction for a 

 more or less lengthened period. 



Neither of the two species named have yet been observed in the Firth 

 of Forth or the Firth of Clyde. These two estuaries, though extending 

 for a considerable distance inland, are comparatively narrow, and the 

 entrance to each is obstructed to some extent by an island ; the Moray 

 Firth, on the other hand, presents an extensive opening to the North Sea 

 and narrows very gradually westwards. Such a difference in the general 

 contour of these inlets has probably a more or less distinct influence on 

 the distribution of their local faunas. 



Paracalanus parvus (Claus). 



1863. Galanus parvus, Claus, Die freileb. Copep., p. 173, PI. 

 XXVI., figs. 10-14; PL XXVII, figs. 1-4. 



This small species has been observed in gatherings collected during 

 the past year both in the Clyde and Loch Fyne, and usually in bottom 

 tow-net gatherings. It was, for example, observed in a bottom-gathering 

 from Station V. ("Whiting Bay, Arran), collected September 8th, and in 

 another from Station XVII. (near the head of Loch Fyne), collected 

 September 29th. 



Stephus fultoni, T. and A. Scott. 



1898. Stephus fultoni, T. and A. Scott, Ann. and Mag. Nat. 

 Hist. (7). vol. i., p. 185, PL X, figs. 1-8; PL II., figs. 1-4, 



Stephus fultoni has apparently not yet been observed outside the Clyde 

 area. It was first observed in 1896 in some material dredged in Kil- 

 brennan Sound, and subsequently in a small gathering of Crustacea 

 collected near the Spit, Loch Fyne, in 1897. I have now to record its 

 occurrence for the second time at this Loch Fyne Station ; the material 

 in which it was obtained on the present occasion was collected during the 

 early part of this year (1899), and a few specimens only were observed. 

 Stephus fultoni, which seems to be a rare species, is comparatively easily 

 distinguished from the other members of the genus by the somewhat 

 larger size of the female and by the male having the fifth thoracic feet 

 conspicuous and furnished with horn-coloured processes. 



Bradyidius armatm (Vanhoffen). 



*1897. Bradyanus armatus (Vanhoffen in:) Chun, Arkt. antarkt. 

 Plankton, p. 28. 



It was pointed out in my "Notes" last year that Bradyidius armatus 

 was one of the more widely diffused of the Clyde copepods, and that it 

 was also occasionally observed on the East Coast. During the past year 



* Vide Das Tierreich, p. 32, 



