50 
Jasus parkeri. 
Parker's Crayfish. 
(Figured in Marine Investigations S.A. Vol. 2, pl. 6.) 
The two: horns point outwards as well as forwards; the 
carapace has a double row of spines down the middle and a 
row at each side, the intervening surface smooth ; the abdomen 
has a ridge down the middle of the 1st-5th segments. 
Length, 6 inches. : 
Orange or orange-red, the spines deeper in colour. 
Found in deep water, 200-300 fathoms, off East London. 
Section II. No rostrum above the bases of the long antennae, 
which are separated by a smooth plate (antennal plate). By 
rubbing the bases of the antennae against the edges of this 
plate, the animals making a rasping noise, and are called 
S-otridentes: 
Two genera in South Africa. 
GENUS PALINURUS. 
Antennal plate narrow and unarmed with spines. The two 
lashes or feelers at the end of the short antennae (antennules) 
are short. 
Palinurus gilchristi. 
Gilchnist’s Crayfish. 
(Figured in Marine Investigations S.A. Vol. 1, pl. 1.) 
Two large horns in front spreading out sideways. Carapace 
covered with spines and warts mixed with short hairs. Abdo- 
men with two transverse hairy grooves on each of 2nd-5th 
segments. 
Length 8+ inches. 
Orange, banded with pale yellow on the antennae, legs 
and abdomen. 
~ Found in False Bay, all over the Agulhas Bank and up the 
East coast as far as Natal, in 30-60 fathoms. 
GENUS PANULIRUS. 
Antennal plate broad and armed with spines. The feelers 
at the end of the antennules are long. 
The five species of this genus found in South Africa may be 
distinguished as follows : 
(a) Segments of the abdomen transversely grooved. 
Panulirus burgeri. 
Burger's Crayfish. 
Antennal plate armed with four large spines forming a 
square within which are two smaller spines. The abdomen is 
ornamented with flat scale-like warts in addition to the groove. 
Length, 6% inches. 
