Fart III. — Tiventy-first Annual Report 



margin (fig. 21). The second, third, and fourth pair are somewhat similar 

 to those of the species previously described (fig. 22 represents the fourth 

 pair). 



The fifth pair are small and foliaceous, the produced inner portion of 

 the basal joint reaches to about the end of the secondary joints and bears 

 five seta3 on its broadly rounded end ; the two outermost setse are, like 

 the next two, situated near to each other, but there is a comparatively 

 wide space between each pair, the innermost seta is smaller and spini- 

 form ; the outer secondary joints are broadly ovate, being onl}^ a little 

 longer than broad, and are each provided with five spines, the middle one 

 of which appears to be more slender than the others, as shown by the 

 drawing (fig. 23). 



The f ureal joints are very small, being almost rudimentary, while the 

 principal tail setae are short and stout (fig. 24). 



Habitat. — Moray Firth, Station IV., collected 1898 ; apparently rare. 



Remarks. — This species is readily distinguished by the peculiar structure 

 of the first thoracic feet, and the comparatively small fifth feet of the 

 female ; the fifth pair is not unlike the fifth pair of Dadylopus minutus, 

 Claus, but the first pair is very different. Dactijlopus vararensis was 

 obtained in a gathering of small Crustacea collected in the Moray Firth 

 in 1878, but as the form could not be recognised at the time it was put 

 aside for further study, and I am still unable to identify it with any 

 described species. 



Dadylopus mixtus, T. Scott, sp. no v. PI. iii., figs. 9-16. 



Description of the Female. — This form has a general resemblance to 

 both D. tenuiremis, G. S. Brady, and D. longirostris, Claus. The body 

 is moderately robust, and in specimens preserved in spirit the abdomen is 

 considerably reflexed ; there is a prominent rostrum, but the furcal joints 

 are very short (fig. 9). Length '6 mm. (about ^ of an inch). 



The antennules (fig. 10) are moderately elongated and composed of 

 eight joints ; the second joint is the largest, the fourth and last are also 

 comparatively long, being about half as long again as the one immediately 

 preceding; the third, fifth, sixth, and seventh joints are small. The 

 antennules are thus somewhat like those of D. longirostris, Claus, in 

 structure, as shown by the drawing. 



The antennse are provided with three-jointed secondary branches similar 

 to those of D. stromii, Baird. 



The mandibles are well developed, the biting edge is armed with 

 several spine-like teeth, the two outer ones are stout, but the others are 

 slender ; the basal joint of the mandible palp moderately dilated, and 

 bears two small branches towards its distal end ; the inner branch is 

 somewhat smaller than the other and is apparently two-jointed ; the other 

 branch consists of a single joint (fig. 11), 



First maxillipeds somewhat similar to those of D. stromii. 



The second maxiUipeds are of moderate size (fig. 12); the terminal 

 claw springs from a narrow joint about half as long as itself ; the second 

 joint is furnished with several small spine-like setse on the inner margin, 

 and the first joint also carries one or two small hairs at its distal end 



The inner branches of the first thoracic feet are elongated, the first 

 joint being longer than the entire outer branches ; the second joint is very 

 small, but the second and third together are about equal to half the 

 length of the first joint ; the first joint is fringed interiorly with minute 

 slender hairs, while a moderately long seta springs from its inner distal 

 angle, the proximal part of the outer margin is provided with a number 



i 



