126 Part I11.—Twenty-jirst 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 
air). 
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 setze on its broadly rounded end ; the two outermost sete 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 only 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 furcal joints are very small, being almost rudimentary, while the 
principal tail setz 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 Dactylopus minutus, 
Claus, but the first pair is very different. Dactylopus 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. 
Dactylopus mixtus, T. Scott, sp. nov. PI, iii., figs. 9-16. 
Description of the Female.—This form has a genera] resemblance to 
both D. tenuiremis, G. 8. 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 {4 of an inch). 
The antennules (fig. 10) are moderately elongated and composed of 
eight joints ; the second joint is the largest, the fourth and Jast 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 antenne are provided with three-jointed secondary branches similar 
to those of D. strémit, 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. strémit. 
The second maxillipeds 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 setee 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 
