CRUSTACEA DECAPOD A—BORRADAILE 
87 
ending in a spine. First leg barely reaching last joint of third maxilliped, its palm 
short and stout. Second leg outreaching third maxilliped. Last three legs with 
dactylopodites serrate, half a dozen spines under propodites, and a strong spine near 
end of meropodites. 
Length of single specimen (a female with eggs), 5 cm. 
Station 96. 
/'j/y 
Family PALAEMONIDAE. 
Sub-family PONTONIINAE. 
Genus PERICLIMENES. 
Sub-genus HAMIGER, n., sub-gen. 
A new pontoniine prawn, of which two specimens were dredged in 70 fathoms off 
the North Cape of New Zealand, appears from most of its organization to lie a 
Periclimenes, but shows certain features that are very rare in that genus, and others 
that are shared by none of its known species. In the circumstances it seems best that, 
for the present at least, the new prawn should represent a distinct sub-genus A The 
features which it exhibits that are unusual in Periclimenes are the absence of a hepatic 
spine (which is missing only in a few cases, such as P. lifuensis, P. parasiticus, and P. 
brevinaris), and a broadening of the ischiomeropoclite of the third maxilliped, such as is 
found in P. broeki alone. The unique features are presented by the two pairs of 
ehelipeds, of which the first bears a feathery tuft of hairs on the fingers, while one of 
the second is of great size and has an abnormal configuration of the fingers. These 
peculiarities, however, are hardly of generic value, for there are considerable 
variations in the structure of both pairs of clielipeds in Periclimenes. The name 
which 1 propose for the new sub-genus has reference to the hooked fingers of the 
great cheliped. 
18. Periclimenes ( Hamiger) novae-zealandiae, n. sp. Fig. 4. 
Diagnosis .—Rostrum straight, its tip faintly upeurved, its formula §, three of the 
teeth standing behind the orbit. Antennal spine alone present on the carapace. 
Antennular stalk slightly outreaching the rostrum, its last two joints subequal and 
together shorter than the first, which has a strong distal spine and a rather slender 
stylocerite reaching about the middle of its length. Outer antennular flagellum cleft 
to a distance about equal to the length of the uncleft region. Antennal stalk equal to 
first joint of antennular. Antennal scale slightly outreaching antennular stalk ; its 
sides subparallel, its end broadly rounded, its subterminal spine not projecting. Third 
maxilliped a little outreaching antennal stalk ; its end-joint nearly as long as that 
which precedes it; these two together longer than ischiomeropodite, which is broad, 
' For the sub-genera of Periclimenes see Ann. Mag. Nat. Hist. (8), XV, p. 207 (1915). 
