62 Proceedings of the Royal Society of Victoria. 



which extend backwards and outwards to the margin at the 

 second third of the length of the cephalic region, forming the 

 three lobes above mentioned. The mesial portion forms a some- 

 what prominent concave rostrum armed on its outer margin with 

 a row of rounded tubercles interspersed with stiff hairs, and 

 reaching almost to the distal end of the first joint of the second 

 antennae. About half-way from the apex a second row of 

 similar tubercles and hairs commences, and as it mounts the 

 cephalothorax these rows become irregular nearly forming a third 

 line. The lateral lobes of the front, which reach about half way 

 to the point of the rostrum, have their margin armed with a 

 single row of tubercles and hairs. Below this on the hepatic 

 region there is a diagonal line of 3 to 4 small tubercles. 



Behind the cervical groove the carapace is quite unarmed, but 

 is fringed with hairs on its posterior margin. 



The abdome)i is without epimeral thickenings. The 3rd, 4th, 

 5th and 6th segments are strongly fringed, but are unarmed 

 above. The 6th segment is subquadrate, and slightly broader 

 than long. It is the longest of the segments, as is typical of 

 the genus. 



The first antennae which are short, and each furnished with 

 two flagellae— are unarmed and do not bear a basal scale — the 

 flagellae reach slightly beyond the peduncle of the second pair. 



The second antennae have the second joint of the peduncle 

 armed with two spines on their upper and one on their lower 

 distal margin. The next two joints are clothed above at their 

 distal end with a number of long stiff hairs. The flagellae, which 

 are almost equal in length to the first pair of legs, are armed with 

 long scattered hairs at each articulation. 



The eye stalks are small, and the eyes are of moderate size. 



The outer tnaxillipedes are pediform. 



First leg. — The basos has two irregular tubercles near to its 

 distal extremity. The arm is furnished with an acute tooth on 

 its upper border, and with 3 to 5 prominent spines on its lower 

 posterior border. The surface is smooch, with the exception of a 

 few long hairs on the upper border round the spines. 



The wrist is carinate, with two prominent sharp spines at its 

 upper, and one at its lower distal extremity, the carina termin- 

 ating with the inner of the two upper spines. 



