of the Fishery Board for Scotland. 149 
1. (Figs. 48, 58, and 60.) In this stage the first maxillipede has 
altered considerably, The protopodite joints are no longer distinct. — 
The exopodite is 3-jointed. It is furnished with four terminal 
sete and a hair close to the tip. The “elbow” joint is not a movable 
one. 
The endopodite (Fig. 60) has a peculiar form. It is twisted on its 
long axis, and has a flat broad extremity upon which there are eight 
short smooth hairs. Its inner edge bears three short hairs, of which 
two are plumose. 
The protopodite lobes (Fig. 58) are now long and narrow. They are 
profusely supplied with spines, of which three of different kinds are 
shown in Figs. 56, 62, and 63. 
The epipodite has more filaments. Of these 13 are on the outer edge, 
four on the inner edge of the proximal half, and one on the surface of 
the latter. On the “heel” there are three stout serrated hairs. 
SeconD MAxILuIPEDE, 2 mp, Plates viii. (Fig. 51) and ix. 
I, (Figs. 68, 76, 83 and 85). The second maxillipede resembles the 
first maxillipede, but differs from it in the size of its endopodite. 
It has the 2-jointed protopodite, a 2-jointed exopodite which bears 
four plumose setz, and a 3-jointed endopodite. 
On the long protopodite joint (the second) there were on the inner 
edge four hairs, of which two had a few cilia. 
The endopodite (Fig. 83) bears on each joint a strong serrated spine, 
that of the third joint being the longest, while that of the first is the 
shortest. On the end joint there is in addition a long slender hair 
and three shorter hairs. The former and one of the latter show a 
single serration each. 
The hair formula was, 0:4:1:1:5. 
On the first joint of the protopodite a rudimentary epipodite was 
made out (ep, Fig. 85). 
II. (Fig. 51). In this stage there is little that calls for special 
mention, except that the hairs and spines are with one exception all 
serrated. 
The exopodite has six plumose sete. 
IIT. (Fig. 65). The endopodite showed on its last joint six hairs 
(Fig. 70), z.e. one more than in the two preceding stages. 
The endopodite has eight plumose sete. 
IV. (Fig. 66). Tn this case the same number of hairs was found on 
the endopodite as in the I. and 11. Zoée. 
The plumose setze of the exopodite are now ten in number. 
The epipodite (ep) on the first joint of the protopodite is now large, as 
is also another process which is a branchia (67r). 
Mecatops (Fig. 64). ‘The protopodite is 2-jointed, and from the first 
joint arise a branchia (br) and the epipodite (ep). It is probable that 
another branchia is present, but it was not made out. The protopodite 
joints are broad and short. The second is the homologue of the long 
second joint in the Zoéa. 
The exopodite is 2-jointed, and the second or distal joint shows a 
line of segmentation across it. At the elbow there is a thickening of 
the integument, probably strengthening. The exopodite has four 
plumose sete. 
The endopodite is 5-jointed and bent. The last two joints are armed 
with stout serrated spines. On the fifth joint there are five serrated 
spines and two smooth hairs, on the fourth two serrated spines and one 
smooth hair, and on the third and second joints one smooth hair 
each, 
