Two new anchialine amphipods from Western Australia 
accessory flagellum 2 articulate, without calceoli. 
Second antenna short, flagellum much shorter than 
peduncle, calceoli absent. Upper lip. Apical margin 
rounded, symmetrical. Mandible. Palp 3 articulate, 
ratio of articles 1:2:2, article 1 not setose, article 2 
bearing 1 strong medial seta, article 3 sub- 
falciform, setate, sub-equal in length to article 2, 
setae = D5,E3. Accessory blades (rakers) = 8L, 7R, 
with few inter-raker plumose setae and few 
additional setae leading to the base of the molar. 
Lower lip with rudimentary inner lobes. Maxillae 
sparsely setose medially. First maxilla inner plate 
triangular, the distal end linear, acute, bearing 10 
plumose setae, outer plate with 9L spinous setae 
and 7R denticulate and spinous setae, palps 
asymmetric, inner plate sparsely pubescent. Second 
maxilla inner plate with oblique facial row of 
plumose setae, outer plate without pubescence, 
both plates with moderate and strong apical setae. 
Maxilliped. Inner plate long, extending beyond 
M0.5 of the outer plate, bearing sparse lateral 
pubescence, distally narrowed, and bearing three 
naked tooth spines and two moderately elongate 
naked setae, laterally and facially a row of long 
setae, and medially and baso-medially sparse setae. 
Outer plate broad, ovate with 7 curved naked 
apical and disto-medial spines without plumose 
distal setae, bearing submarginal, facial and 
ventro-facial slender setae. Palp article 2 without 
lateral setae, article 3 with a single sub-marginal 
lateral seta at M0.4, and 2 latero-facial setae at M0.8 
and M0.9, article 2 moderately setose medially, 
article 3 bearing disto-facial pubescence, and a few 
elongate disto-medial setae basal to the dactyl, the 
apex not produced, dactyl unguiform with 2 distal 
accessory spinules, equal to the nail which is of 
moderate length, and bearing two accessory 
posterior spinules. Coxae. Cl-2 longer than broad, 
C3-4 as broad as long, Cl-4 without posterior 
spines. Cl not expanded below, C4 not excavate 
posteriorly. Gnathopods subchelate, 1-2 diverse. 
Setae of articles 4 ordinary, not rastellate. First 
gnathopod small, feeble, carpus longer than 
propodus, not lobate, merus lobate the lobe 
pubescent, palms transverse, palmar spines 
symmetrical, not bifid, without small sub-apical 
trigger like extensions. Spines at comer of palm 
absent, rather with an adjacent row of 7 slender 
setae. Few spines or setae along the palm, dactyls 
lacking recumbent inner tooth spines, but bearing 2 
posterior accessory spines, and a pair of elongate 
setae arising adjacent the base. Dactylar nail 
present. Second gnathopod enlarged, 1.4x Gl, carpus 
equal to propodus, with shallow, pubescent 
posterior lobe, posterior setae sub-marginal 
proximally, to facial distally, propodus ovate, palm 
oblique, moderately spinose, defining corner with 
2 elongate 'hadziid' setae, 1 moderate medial seta 
and single lateral and medial bifid setae, posterior 
405 
margin bearing few long 'hadziid' setae (Barnard 
& Barnard, 1983). Dactyl bearing several 
recumbent inner tooth spines, nail absent. Pereopods 
slender, weak. P3—4 smaller, weaker than P5-(7), 
posterior spine sets on article 6 of P3—4 sparse, 
weak. P5-(7) moderately elongate, (P7 longest), P5 
shortest, article 2 moderately expanded, ovate, 
slightly lobate on P5-6. Dactyls of P3-1 bearing 2 
distal accessory spinules as well as an outer basal 
penicillate setule. Gills. Coxae 2-6 each with a large 
flask shaped gill. Gills 4-5 largest. 
Epimera. Posteroventral tooth of El-3 absent. 
Posterior margins smooth and naked except E2-3 
with single, small posterior setae, E3 bearing a 
single, small antero-ventral seta Pleopods similar 
each with 2 retinacula, without peduncular setae, 
and all plumose setae of rami simple. Rami 
extending sub-equally and symmetrically. Urosome. 
With a single, tiny ventro-distal spine on urosomite 
1 at the base of Ul. Uropods. U3 extended, 
magniramous, dispariramous, peduncle short, 
outer ramus 2 articulate. Apico-lateral and apico- 
medial comers of peduncles of Ul-2 with 1 spine, 
the dorsal margins of Ul spinose, peduncle of Ul 
bearing a baso-facial spine. Rami sub-equal, the 
lateral being the shorter, rami of Ul-2 with single 
spine rows, the medial margins of rami bearing 
fine setae. Rami of U3 bearing medial, lateral and 
apical setae. Telson shorter than broad, cleft 100%, 
lobes moderately tumid laterally, and medially, 
with sub-apical setation, medial and lateral setae 
virtually absent. Penicillate setules present sub- 
apically. 
Description of holotype (male) 
Body 4.0 mm. (Figure 4). Poorly armed dorsally. 
Head. Rostrum weak, lateral cephalic lobes weakly 
projecting, antennal sinus small, distinct, eyes 
absent. First antenna (Figure 4) length 0.6x body. 
Flagellum longer than peduncle - 1.9x (115:61) - 
peduncular article 1 shorter than article 2, bearing 
weak setae only, article 3 shortest (ratio of lengths; 
24:27:10), with sparse setae, accessory flagellum 2 
articulate, reaching M0.7 of article 1 of primary 
flagellum. Primary flagellum of 23 articles, article 1 
elongate, 1.8x article 2, articles 2 to penultimate 
article progressively elongate and slender, most 
bearing aesthetascs, sparsely setulate, calceoli 
absent. Second antenna (Figure 4) length 0.2x body, 
peduncle longer than flagellum (65:35), gland cone 
well developed and extending to M0.7 of the third 
article, peduncular article 3 with few setae or 
spines, article 4 longer than article 5, both slender, 
moderately setulate. Flagellum 6 articulate, calceoli 
absent. Upper lip (Figure 4). Apical margin 
rounded, symmetrical, with a small terminal area 
of short pilia. Lower lip (Figure 4). Inner lobes small, 
rudimentary, indistinct. Mandibles (Figure 4). 
Asymmetric. Left mandible: palp article 1 shorter 
