72 
iSiCHoLLS — A New Blind Freslnvatcr Amphipod. 
tlio planarian hehi^ less ahuiidant. An extended seareli, lasting tlie 
■whole day, revealed the Ami)l)ipod, oeeuvnng not very al)undantly, 
in another similar si)i'ing some hundreds of yards lo-u’cr dov.'n the 
valley, but Hypcrocdcsipus was not found there. 
The Ampliipod proved not only to be new, but to exhibit a 
combination of characters which made it difficult to assign it to any 
deseril)ed genus; coming nearest, perhaps, to Bucrangonyx (known 
only from CVntral Kurope and North America), from which it differs 
principally in the shape of the telson and certain of tlie mouth parts. 
From the New Zealand genus Paraemngonyx it was excluded by its 
retention of l)otli the rami of the ^deopods. It is clearly marked off 
from Cningonyx^ to which it has obvious affinities, by its possession 
of an inner ramus to the third uropod, which has been lost in 
C rangonyx ; some species of tliis genus, however, ha.ve preserved the 
entire condition of the telson, as have the single species of both 
Paracrangonyx and Apoevangonyx. The latter, however, has lost 
both rami from the third uro])od. In its mouth parts, the Lesmurdie 
specimen approaches more closely to Paracrangoiryx and to Neonl- 
phargns (an Australian genus), fi-oni which latter it is readily dis- 
tinguished l)y the cleft telson and elongate third uro])od of that genus. 
It has been found necessary, therefore, to constitute a new genus for 
the reception of this Western Australian form, for which I propose 
the name Protocrangonyx. 
Pkotocrangox vx gen. nov 
Body compressed, not carinate. Side-plates shallow, 1 — 4 
scarcely «lee})er than the following. Eyes absent. Antenna 1 the 
longer, accessory tlagellnm small, 2-jointed. Ui)per lip rounded, 
lower li]) with indistinct inner lobe, mandibular pal[) with 2nd joint 
longer than Mrd, maxilla 1 inner ]dat<’ witli a single seta, palp differs 
on the two sides, maxilla 2 inner plate partly fi'inged on both inner 
and outer margins, maxilli])ed with outer |)late reaching to middle 
of 2nd lol)e of pal]), and set mesially with stout spines and setae. 
Gnathopods 1 and 2 e(|iial, subchelate, 6th joint not markedly wider 
tlian 5th. Peraeopods 3 — 5, 2nd joint slightly expanded, accessory 
branchiae on 3 and 4. Uropods 1 — 3 projecting backwardly to the 
same level, rami nne(|ual, iiro])od 3 small, Avith short 1-jointed 
outer ramus, inner ramus redneed to a scale. Telson small, entire. 
Protocrangonyx fontinalis sp nov. 
Body slender. Side ])lates shallow, side-plate 4 the deex>est. 
Pleon segments 1 — 3 broader than tlie preceiling, a couple of setules 
on each doesally, usually trvo or three setae upon ventral margin of 
each plate; ])ost('ro-lateral corners <jiiadrate or ol)tusely quadrate. 
Eyes Avanting. Antenna 1 almost half the length of the animal, 
llagellum with 12 — 13 joints, twice as long as peduncle; accessory 
flagellum 2-jointed, usually as long as first tAvo articnli of flagelliim. 
Antenna 2 tAvo-thirds length of aiitcnina 1, 4tli joint of jiedmude 
