Ntciioi.ls — Nnu hlind Amphipod from J'ictoria. 
85 
The side ]dates of tlie ^nathoiioda are well rounded, the anterior 
considerably the smaller; the jiuathoijoda (PI. IX., Pi.i>s. 4, 5) are 
much alike exceiding for a slight difference in the sha]K' of th-> 
6th joint and a conse(|uent alteration in the slo]»e of the ]»alm. 
The bases, too, of the secoml ^'natho])od is rather longer than the 
corresponding joint in the ])rece<ling limb. 
The ])eraeopods (PI. IX., Pig. 6) do not difft'r noticeably fiom 
those of N. fultoin excepting, perhai>s. that they are a triffe shorter 
relatively. The gi'ouping of the setae on the inferior margin of 
the side-i)lates 1 — 4 is closely ])aralleled in the side i»!ates 1 and 2 
of N. fuUoui (tide Sayce’s figures, 1902. PI. VII., (bi.^ and (hir), 
but these setae are not shown in the figure of the fourth side-plate 
(op. cit., PI. VIII.. pr. 2). In N. spenceri^ these setae are shown 
as mucli more numerous, but still se])arable into two groups (1900, 
PL XL., Pig. Gn.^). In N. tJiomsoin they a])i>ear to form a con- 
tinuous fringe (Thomson, 1892, PL VI., Pig. 8). while in the 
Western Australian form. N. hmnch-uiHs (1924, PL XL, ]). 1). these 
setae have undergone a decrease in numl^er, the two grou])S of setae 
being represented by but one and two setae res])ectively. 
The occurrence, on tlie dactyl of the })eraeoi)oda, of a single 
plumose seta may be a character of generic value. It certainly 
occurs in all of the undoubted species of Nconipharpus whiclt ! 
have been able to examine and is figured by Sayce, for N. fid tout, 
but without mention in the text. It does not appear, however, in 
that author’s figures of N. spenecri. 
Accessory branchiae (PL IX., Pigs. 6, 7) related to certain of 
the peraeopods, seem to be peculiar to N. obrieni, among Pastern 
Australian forms, nor does Geoffrey Smith refer to such structures 
as present in Tasmanian species. Their branched condition on two, 
at least, of the peraeopods is paralleled in N. hranchiaUi:! (1924, PL 
X., Fig. Gn.2 and PL XI., Figs. P.I and P.3). 
The pleon is much less deep, than in either of the species 
described by Sayce; the ventral margin of each of tlie three 
segments is armed with two setules each with a sub-apical notch 
bearing a ciliuni;-[- in N. ftiUoni there is but one. well develo])ed 
spinelet in this position ami in N. spenecri this is alisent, ajiparently. 
The urosonie is, however, less s])inulose than in N. fidtoni. 
The third uropod (PL IX., Pigs. 8, 9, and 9a) has the outer 
ramus unusually short and less spinulose than in N. spenecri^ and 
t This type of seta is said to characterise members of the genus 
Crangonyx. It is also present, as I have pointed out (1926), in a 
blind Western Australian form, Frotocrangongx, intermediate in 
character between Crangonyx and Neoniphargus. 
