Victorian Freslt-water Anvphipoda. 239 



cleft spines ; dactylus acute, inner surface with scattered 

 spinules. Peraeopocla long and slender, tirst two pairs longer 

 than the gnathopods, dactylus of each with three stout spines 

 along the inner face. First pair of uropods of subequal length 

 to the second, third with peduncle short and stout, outer ramus 

 very long, equal in length to peduncle of tirst pair, inner side 

 with four, and the outer side with six transverse rows of spines, 

 and the distal margin bearing a circlet of apically cleft spines, 

 which almost hide a very short conical rudimentary joint, the 

 apex of which bears three setae and a minute furred spur; inner 

 ramus squamiform, with the apex bearing a few setae. Telson 

 long, deeply cleft, apex of each piece obliquely truncated, and 

 bearing three small spines, and also a few on the dorsal surface. 



C<?/i9//r.— Spiric specimens, yellowish without markings. 



Length. — 10-5 m.m. 



Occurrence. — From amongst spongy moss at the source of a 

 spring running into Wallaby Creek, Plenty Ranges, Victoi'ia. 

 Altitude about 2000 feet. (Collected by J. Shephard). 



Distribution. — Lake Petrach, Tasmania. Altitude 2900 feet. 

 (Collected by W. B. Spencer). 



Renm?-ks. — This species is named in compliment to Professor 

 Baldwin Spencer, F.R.S., etc. It rather closely resembles Uni- 

 melita montanus (Thomson) but is easily identified by deeper 

 coxal plates and by both the terminal uropoda and antennae 

 being nmch longer. In respect to general features they are in 

 close agreement. 



Supplementary Description. 



Upper Antennae. — These are rather slender and do not bear 

 many setae; the first and second joints of the peduncle are of 

 subequal length, the thii'd, one-third shorter, and the secondary 

 appendage is two-jointed and not longer than the first joint of 

 the flagellum. The flagellum has about twenty articulations. 



Loiver Antennae. — The peduncle is rather longer than the 

 peduncle of the upper, its third joint is short, the fourth three 

 times longer, and the fifth is of equal length to the third. The 

 flagellum is formed of about twelve articulations. 



Anterior Lip. — This is rather short and broad, with the distal 

 margin evenly rounded and finely ciliated. 



