A Neiv Species of Fresh-water Isopoda. 27 



and more slender, fifth still longer, being as long as first three 

 combined. First maxilla with outer lobe narrow, and apically 

 furnished with twelve spines; inner lobe bearing four plumose 

 setae. Maxilliped with distal outer angle of meros much 

 produced, carpus also produced, but in a lesser degree, propodos 

 ovoidal, broader than long, dactylos shorter and much narrower ; 

 epipodite extending to distal inner angle of meros. Appendages 

 of peraeon spinose, dactylos of each unguiculate. Gnathopod 

 having the propodos large, palm oblique, straight, clearly defined, 

 and deeply serrated near articulation of dactylos. Pleopods 

 normal. Uropods with peduncle not reaching to the extremity 

 of telson, superior outer margin very spinose, its inferior distal 

 angle not having any very thick setae with pectinations at their 

 ends, inner ramus subequal in length to peduncle, outer I'amus 

 shorter ; a single stout spine medianly on superior margin of 

 each. 



Female. — Unknown. 



Colour. — Light brown, with indefinite markings of darker 

 brown. 



Size. — 10 mm. 



Habitat. — From amongst spongy moss at the source of a spring 

 running into Wallaby Creek, Plenty Ranges, Victoria. Altitude 

 about 2,000 feet. 



Rejuarks. — This species is r.amed in honour of Mr. J. Shephard, 

 president of the Victorian Field Naturalists' Club. It agrees 

 rather closely with F. australis, Chilton. Compared with 

 Chilton's description of that species^ the chief distinguishing 

 features appear to be — 



(1). The pleon is relative longer. Taking the cephalon and 

 peraeon as 100, then in F.^ austmlis the proportion is 

 TTo' while in F. shephardi it is -~-^'-^. 

 (2). The dactyli of the legs do not possess a secondary 

 unguis. The palm of the subchelate hand of the 

 first pair is straight, not convex, and clearly defined, 

 not rounded at the postero-distal angle, as in F. uus- 

 tralis ; and, further, it is strongly serrated near the 

 articulation of the dactylos. 



1 Records of Australian Museum, vol. i., pp. 149-171. 



