DE. T. SCOTT ON COPEPODA 



the basal joint extends into an elongate and slender process 

 bearing a single seta at its extremity. The secondar}^ joints are 

 very narrow and reach to about the end of" the inner produced 

 part of the basal joints ; they are eacli provided with two apical 

 setae — one long and one very short — and a small seta near the 

 distal end of the outer margin (PI. 3. fig. 12). 



The male differs little from the female, except in the following 

 particulars : — The antennules are modified as shown in the 

 drawing (PI. 3. fig. 13). The third pair of thoracic feet are 

 furnished with a sigmoid appendage, which is moderately stout 

 at the base, but tapers towards the extremity (fig. 14). The 

 fifth pair of feet also differ slightly from those of the female. 



The Cletodes just defined is distinctly different from any 

 described species with which I am familiar; its slender form, 

 elongated caudal furca, and the peculiar structure of the anten- 

 nules distinguish it almost at a glance from allied species. 

 Only a few specimens were obtained. 



Dacttlopus, Clans, 1863 *. 



Dacttlopds Stromii (Baird), var. FAiiOEisrsis, var. n. (PI. 2. 

 figs. 9-1-1; PI. 3. figs. 1-3.) 



1837. Cyclojjs Stromii, Baird, Mag-. Zool. & Bot. vol. i. p. 330, t. 9. 

 figs. 23-25. 



18G3. Dcctylopvs Stromn, Claup, Die frei-lelbeudeu Copepoden, p. 1:?6, 

 t. 16. figs. 1-13. 



Description of the female. — Body moderately stoat ; rostrum 

 short (PI. 2. fig. 9). Length from the extremity of the rostrum 

 to the end of the caudal furca about 1 mm. 



Antennules eight-jointed, somewhat similar in structure to 

 those of Dactylopus Stromii ; but when compared with the 

 description aud figures given by Glaus there appears to be a 

 sliglit difference in the proportional lengths of the last four 

 joints. Glaus states that the fifth and seventh joints are short, 

 and his figure shows them as being subequal ; whereas in our 

 specimen the fifth joint is short, the sixth and seventh subequal 

 and longer than the fifth, while the last, which is longer than 

 either of the three preceding joints, is about equal in length to 



* Moil, British Copepoda, Brady, vol. ii. p. 105 (1880). 



