of the Fishery Board for Scotland. 465 



Cletodes longicaudata, Brady and Robertson. PI. XXIII., figs. 26-33. 



1875. Cletodes longicmidata, Brady and Robertson, Brit. Assoc. 



Rept., p. 196. 

 1880. Cletodes longicaudata, Brady, Mon. Brit. Copep., vol. iii., 



p. 92, pi. Ixxix., figs. 13-19. 



A perfect specimen — a female with ova — was obtained in a gathering 

 from the west end of Station III., Firth of Forth, collected on June 7tli, 

 1901. As the species is somewhat rare I give a short description of it, 

 along with figures of some of the principal appendages. The female 

 specimen referred to measured about "84 mm. (-^^y of an inch) in length 

 from the forehead to the end of the caudal furca, but the caudal f urea, 

 which are very long, are about equal to a fourth of the entire length of 

 the animal ; the rostrum is of moderate length (fig. 26). 



The antennules are short, moderately stout, and composed of five 

 joints. Professor G. S. Brady describes the antennules of his specimen as 

 six-jointed, but this difference may be due to a slight local variation. 

 The fourth joint is very small and carries an asthetask or sensory 

 filament (fig. 27). The formula shows approximately the proportional 

 lengths of all the joints : — * 



Proportional lengths of the joints, . 6 • 13 • 20 ' 4 '23 

 Numbers of the joints, . . .1'2'3*4'5 



The antennfe (fig. 28) are of moderate size, but the secondary branches 

 are small and one-jointed. 



In the first four pairs of thoracic feet, the outer branches, which are all 

 three-jointed, are all of them somewhat similar in structure ; the first joint 

 is slightly longer than the second, while the end joint is distinctly longer than 

 either of the other two; the marginal armature consists also of setae rather 

 than spines. The inner branches of all the four pairs are slender and 

 two-jointed, the first joints being very short. In the first pair the end 

 joints of the inner branches extend somewhat beyond the outer branches 

 and are furnished witli two long terminal setaj (fig. 29). In the second 

 pair the end joints of the inner branches are, like those of the first pair, 

 long and slender, but they do not reach to the extremity of the outer 

 branches ; they bear two long terminal setse (fig. 30). In the third and 

 fourth pairs, the inner branches are considerably shorter than the outer 

 and bear one sub-terminal and two apical setse (fig. 31). 



The fifth pair are moderately large ; the secondary branches are 

 elongated, narrow-cylindrical, and about four times longer than broad ; 

 they are armed with two terminal and three strong marginal setae, as 

 shown in the figure ; the inner produced portion of the basal joint is 

 nearly as long as the secondary joint, and provided with three moderately 

 elongated setse near the distal end ; a long slender seta also springs from 

 the outer aspect of the basal as shown (fig. 32). 



Cletodes longiratidata does not appear to be a very common species 

 anywhere, although it seems to be widely distributed. 



Fultonia, T. Scott (gen. no v.). 



This genus is somewhat like Cletodes, G. S. Brady, in general 

 appearance. The abdomen in not distinctly separated from the thorax. 

 The antennules are moderately short and composed of about eight joints. 

 The antennae are each furnished with a small secondary branch. The 

 mouth organs are similar to the same appendages in Cletodes. The 

 outer branches of the first four pairs of thoracic *3et are all three-jointed, 

 while the inner branches of the first pair are composed of two, and of the 

 second, third, and fourth pairs of three joints. The fifth pair are nearly 

 2 F 



