Victorian, Fresh-iuater AmpliApocla. 233 



and fringed with a row of long spine-teeth, which gradually 

 increase in length, and become more slender distally ; there is 

 also a parallel row of slender spinules, some of which are 

 minutely pectinated, which extend a very little beyond the apex 

 on the outer margin. 



The first joint of the palp is short and has ft, bunch of setae on 

 the inner and outer distal angles, the second is very broad, sub- 

 ovoidal, almost as broad as long, with the inner surface covered 

 with fine setae, and the outer margin having a bunch of setae 

 medianly, and at the distal angle. The third joint is strongly 

 incurved, only half the width, and rather more than half the 

 length of the preceding joint, the inner surface is unclothed, 

 while the outer bears on the distal half three transverse rows of 

 pectinated setae, the last row of wliich fringes the whole of the 

 distal margin and almost hides the last joint. Tlie last joint 

 terminates in a pointed unguis, the outer face is unclothed, and 

 the inner is setose. The ultimate and penultimate joints together 

 curve inward and form a half-circle, the nail pointing almost 

 directly hind wards. 



Family GAM M ARID AE. 

 1. — Gammapus austi^alis, sp. n. 



(Plate XXXIX.). 



Body slender and compressed, back evenly rounded, segments 

 of urosome and last segment of metasome dorsally possessing 

 many long fine spinules. Cephalon as long as the first two 

 segments of mesosome combined, lateral corners rounded, 

 projecting somewhat at the bases of the lower antennae, deeply 

 incised below. Eyes very small, subspherical, black. Coxal 

 plates of anterior four segments of mesosome, deeper than 

 their respective segments, their inferior margins fringed 

 with long spiniform setae, and their posterior margins distally 

 bearing a few short stout spines. Segments of metasome deep, 

 the second with antero-lateral angles rounded, and possessing 

 three submarginal spines, postero-lateral angles right angled, and 

 margins above fringed for a short distance with setae; third 

 segment similar, except that the postero-lateral angles are acute. 



