43i MR. G. M. THOMSON OX THE NEW ZEALAND 



the local fauna, but none of these are represented in our museums. They are all 

 deep-sea species. 



The following list includes the names of all the species kuowji up to the present 

 time. 



Tribe C R AX GO N I D E A.. 

 Tamily CRANGONID^E. 



Genus 1. Pontophilus, Leach, 1817. 



1. P0NTOPHII.TJS AUSTRALis, G. M. Thomson. (Plate 27. figs. 1-5.) 



1879. Crangon austraUs, Hutton, MS. ; G. M. Thomson, Trans. N.Z. lust. vol. xi. p. 231, pi. 10. 

 fig. A 1. 



Carapace (fig. 1) about one-third of the length of the animal, the whole surface some- 

 ■\vhat rugose with very short hairs, and bearing five irregular longitudinal rows of spines. 

 The rostrum is very short, blunt, and hollowed above, and does not extend beyond the 

 eye-stalks. The eye-sockets are semicircular, tlieir lower limit defined by a sharp spine. 

 The margin then inclines a little forward, and at its lower edge ends in a rather long- 

 acute spine ; the whole margin is rather setose. On the median line the carapace is 

 slightly ridged and carries two short spines ; on each side and behind the orbital spine 

 is a second row of four spines ; and on the lower lobe of the carapace are two acute spines, 

 the posterior one at a little distance from the margin. Tlie pleon is nearly smooth. Its 

 second segment is shorter on the dorsal line than the first, but its lower mai'gins 

 are produced both backwards and forwards into rounded broad lobes. The third 

 and fourth are subequal in length ; the lateral margins of the fifth are produced 

 posteriorly into a two-spined lobe. The sixth segment is two-ridged above, and ends on 

 tlie sides in a three-spined process. 'J'he telson reaches to the extremity of the tail-fan ; 

 it is narrow and tajjering, its margins are fringed with setae, and it ends in three minute 

 teeth and a number of plumose hairs. 



The eye-stalks are short, stout, and bhmt ; the eyes are reniform. 



The first antennae (fig. 2) have the broad plate on the outside of their base reacliing 

 nearly to the extremity of the first joint; the latter is pi'odnced on its outer distal 

 margin ; the second and third joints diminish in length ; the flagella are short. 



The second antennre have the scaphocerite about twice as long as broad, produced 

 considerably beyond the peditncle, and ending in a strong tooth. 



Th(^ third maxillipeds are mtich elongated, extending considerably beyond the i)latc of 

 the fir.st antennie. According to Spence Bate ('Challenger' MaeriuM, p. 182), the 

 dactylos and 2)ropodos are wanting in the members of this family ; Avhile Stebbing (South 

 African Crust, p. 17) says : " in the third maxillipeds it is clear that the geniculation 

 occurs between the fourth and fifth joints, and in all probability the si.xth, which is much 

 longer than the fifth, represents a coalescence of the sixth and seventh joints." In this 



