* 
Mr. W. Omer Cooper on Paragnathia. 125 
consisting of three stout subequal joints, that of the inferior 
pair with the first two joints short and strong, the third 
joint slightly shorter than the fourth which is about twice 
the length of the second, the fourth joint increasing in size 
distally, and, together with the second and third joints of 
the superior ,antenne, provided with numerous tufted sensory 
hairs. Mandibles somewhat small and of a simple form, 
with a small notch on the outer edge and with about seven 
strong distinct teeth at the extremity. Maxillipeds with the 
basipodite large and rounded, slightly longer than the palp, 
which consists of four small joints provided with numerous 
long plumose sete along their outer edges; the endite of 
the basipodite of a regular oval shape, distinctly jointed 
at the base, and provided with nine coupling-hooks along 
theinner edge. First pair of perzeopods (gnathopods) con- 
sisting of five flattened joints, ciliated on both edges and 
provided with a few long and stout sete; the first joint 
about two-thirds as broad as its length, the secoud very 
smal], the third and fourth together equal in length to their 
breadth and a little longer than the first joint, the fifth joint 
small, more than twice as long as it is broad ; the other five 
pairs of pereeopods adapted for walking, terminating in a 
stout claw, the third, fourth, and fifth joints with a few 
spines on the inner surface. Pleopods without sete, the 
outer branch terminating in a short spine. Uropods fringed 
with a few long sete. External sexual organ stout, bilobed 
at the extremity. Length 5 mm. Colour dirty-white to 
brown. 
Female. Body rounded, head short and subtriangular ; 
eyes rather large ; last abdominal segment short and tri- 
angular. First pair of pereopods (gnathopods) somewhat 
short and flattened, the last joint much smaller than the 
others and bearing one or two set, the other joints having 
numerous short stout spines along their edges; other 
appendages as in the male. Length 4 mm. Colour grey: 
Larva. Mouth-parts suctorial ; mandibles, maxille, and 
maxillule styliform ; maxillipeds serrated on the inner edge, 
palp two-jointed. First pair of pereopods terminating in a 
stout claw, having a small tooth near the base ; others as in 
adult. Pleopods fringed with sete. Length on leaving 
brood-pouch 1°55 mm. Colour in late praniza stage bright 
green or orange. 
Distribution. St. Audrews ; Christchurch Harbour ; Ply- 
mouth ; Strangford Lough, Ireland (Bate and Westwood) ; 
Roscoff (Delage). 
