a a 
55 Messrs. T. and A. Scott on some 
Pseudowestwoodia pygmea, sp. n. (PI. VI. figs. 8-16.) 
Description of the Species.—Female. Length ‘4 millim. 
(sz of an inch). Very like Westwoodia nobilis (Baird) in 
general appearance, but smaller. Anterior antenna short, 
seven-jointed ; the first two basal joints are moderately stout, 
the fourth, fifth, and sixth are subequal in length and much 
shorter than the others, as shown by the formula— 
Proportional lengths of the joints.. 12-12.11.4.4.5. 8 
Number of the joints ............ Tes ga i aa ea 
Posterior antenne slender and similar to those of Pseudo- 
westwoodia Andrewi, T. Scott*. ‘The basal joint of the 
mandible-palp is slender and elongate, but the two end-joints 
are very short and are furnished with several sete. ‘he 
maxille are small, the distal half is only about half the width 
of the comparatively broad basal portion, and is armed with 
several spine-like teeth, while three narrow processes spring 
from the large notch formed by the sudden contracting of the 
exterior margin ; these processes are subequal in length and 
reach to about the middle of the biting part; they are each 
furnished with several small sete; the two inner processes 
are also armed with an elongate slender spine (tig. 10). 
Anterior foot-jaws small, provided with a strong terminal 
claw, and also with three narrow processes on the distal half 
of the inner margin, each of which bears a few small terminal 
sete (fig. 11). Pesterior foot-jaws somewhat similar to those 
ot Pseudowestwoodia Andrew?, but rather more robust. ‘The 
first pair of swimming-feet are also similar to those of that 
species, but the inner branches have the first joint propor- 
tionally longer and are armed with two stout and elongate 
terminal spines; the longest of the two is about twice the 
length of the other and fully half as long as the entire length 
of the inner branch ; the end-joint of the mner branches has 
a pseudo-division extending across the middle of it (fig. 13). 
The second, third, and fourth pairs are nearly as in Pseudo- 
westwoodia Andrewi (tig. 14). Fifth pair small; the basal 
joint has a somewhat semicircular outline, but the width is 
greater than the length, and the inner portion is scarcely 
produced beyond the base of the secondary joint; there are 
five stout sete arranged round the distal part of the margin, 
the middle seta being considerably longer than the others ; 
the exterior angle of the basal joint extends into a narrow 
* See ‘Twelfth Annual Report of the Fishery Board for Scotland,’ 
part iii. p. 257, pl. ix. figs. 21-29. 
