460 Part III. — Twentieth Annual Report 



The first pair of thoracic feet are elongated and slender, and especially 

 the inner branches, the first joint being about as long as the entire length 

 of the outer branches ; the other joints are small, but the end one is 

 about twice the length of the penultimate joint (fig. 6). The following 

 three pairs have the outer branches long and slender ; the inner branches 

 are also slender, but they are shorter than the outer, as shown by the 

 figure (fig. 7) which represents one of the fourth pair. 



The fifth pair are small and somewhat foliaceous, the basal joints are 

 sub-triangular and provided with about four setae on the rounded apex. 

 The secondary joints are subovate, and the inner margins are fringed 

 with minute hairs, while one or two moderately long setae spring from the 

 apex, and one or two others from the outer margin (fig. 8). 



Caudal furca shorter than the last abdominal segment (fig. 9). 



Habitat.— Dredged at Station VI., Firth of Forth (off St. Monans), in 

 July 1901 ; only one^or two specimens were obtained, but no males were 

 observed. 



Remarks. — This species is readily distinguished by the elongated 

 antennules and the long and slender first pair of feet ; it differs in both 

 of these appendages from Ameira longipes, Boeck, as well as from the 

 other described species of Ameira known to me. 



Ameira propinqua, T. Scott (n. sp.). PI. XXIV., figs. 10-18. 



Description]of the Female. — Length about -6mm. (nearly JL f an inch). 

 Body slender, sub-cylindrical, the cephalo-thoracic segment about equal 

 to the entire length of the next three segments, rostrum very small (fig. 

 10). 



Antennules slender and rather longer than the cephalo-thoracic 

 segment, eight-jointed ; the second joint is the longest, the first and third 

 are sub-equal and about two-thirds the length of the second ; the 

 remaining joints are small (fig. 11). The formula shows approximately 

 the proportional lengths of the various joints : — 



Proportional lengths of the joints, 12 • 17 ' 12 * 4 • 4 • 5 * 3 * 5 

 Numbers of the joints, ■ • 1 • 2 • 3 * 4 ■ 5 • 6 * 7 ' 8 



Antennae elongate and moderately stout, secondary branches small, 

 slender, and one-jointed (fig, 12). 



Mandibles cylindrical and not very broad, the truncate apex is armed 

 with a stout spine on the outer angle and a few small spiniform setae, as 

 shown by the drawing (fig. 13). The mandible-palp is of moderate size, 

 the basal joint is provided with a single one-jointed and terminal 

 branch. 



The second maxillipeds (posterior foot-jaws) are small but with well- 

 developed terminal claws, which are rather longer than the joints to 

 which they are articulated (fig. 14). 



The first four pairs of thoracic feet are slender and elongated. In the 

 first pair the inner branches are narrow and considerably longer than the 

 outer branches, the length of the first joint is equal to that of the 

 second and third combined, but the second and third joints are sub- 

 equal in length ; a single small seta springs from the inner margins of 

 the first and second joints, while the end joints are provided with three 

 terminal hairs, the middle one being the longest. The outer branches, 

 which are composed of three sub-equal joints, reach to a little beyond 

 the end of the first joint of the inner branches (fig. 15). The inner 

 branches of the next three pairs are considerably shorter than the outer 

 branches, which are slender and elongated (fig. 16). In all the four 

 pairs the outer and inner branches are three-jointed. 



