94 BRITISH COPEPODA. 



rami of which are three times as long as broad, 

 and have a short seta on the external margin not far 

 from the base ; the terminal tail setae are shortly 

 plumose, the longest scarcely as long as the abdomen. 

 Anterior antennae (fig. 2) 11-jointed, the seventh 

 joint much the longest and more slender than the 

 six basal joints. The following formula represents 

 the relative lengths of the joints : 



1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 

 784625 14 64 4 5 



The third joint of the posterior antenna (fig. 3) is 

 very short, the terminal setae sharply curved at their 

 apices. Mandibles (fig. 4) divided at the apex into 

 five sharp, slender teeth ; basal portion of the palp 

 elongated, bearing one terminal seta and two 1-jointed 

 setiferous branches. Maxilla (fig. 5) having a large 

 3-lobed palp. Anterior foot- jaw (fig. 6) stout, 

 4- jointed, with several marginal setiferous processes ; 

 posterior slender, 5- jointed (fig. 7), the last three 

 joints very short. Marginal setae of the swimming- 

 feet (fig. 8) short ; spines of the outer branches sharp 

 and slender ; fifth pair of feet (fig. 9 a, a) 2-jointed, the 

 terminal joint bearing four apical, subequal setae. 

 Length ^-nd of an inch ('65 mm.). 



Several specimens of Cyclopina gracilis were taken 

 by the Rev. Alfred Merle Norman at Oban during the 

 summer of this year (1877), and my own collection 

 contains a few examples found amongst Zostera at 

 Rathmullen (Lough S willy). 



3. Cyclopina (?) ovalts, Brady, See Appendix, vol. 2. 



