1 20 THE VICTORIAN NATURALIST. [Vol. XXIV. 



Remarks. — The name is derived from the aboriginal name of a 

 creek which runs near where specimens were collected. 



Koonuvga cursor, sp. n. 



Specific Description. — Anterior' portion of the body of sub- 

 cylindric form, becoming gradually rather broader, deeper, and 

 cylindrical posteriorly. All the segments of the thorax and 

 abdomen subequal. Abdomen of equal length to the thorax, 

 last segment not longer than the preceding one, with one or two 

 dorsal spines close to the attachment of the telson. Telson 

 entire, slightly broader than its length, of triangular form and 

 rounded apex, margin fringed with a double or more series of 

 stout spines. Uropoda with peduncle extending to half the 

 length of the telson, its branches somewhat longer than the 

 peduncle, inner one fringed along the inner margin with upturned 

 spines, and three longer ones at the apex pointing outward; outer 

 margin and apex fringed with very long feathered setas ; outer 

 branch fringed with long feathered setae, and the outer margin 

 also with a row of upturned spines. 



Mandibles each with a broad cutting plate, that of the left 

 side curving outwards, and the edge divided into six stout teeth ; 

 that of the right side also broad, curved in the reverse direction, 

 and the edge divided into five stout teeth ; molar process similar 

 in each, forming a well-extended broad ridge clothed with short, 

 stout setae, surrounding a minute triturating surface with chitinoid 

 papillae. 



Maxillipeds rather stouter than the legs, extending directly 

 forwards about as far as the distal end of the peduncle of the 

 upper antennae, the seventh joint (dactylus) minute, stout, and 

 bearing four claws on the rounded extremity. The seventh joint, 

 also, of each of the other limbs, minute, and bearing three long, 

 stout claws, the middle one rather longer than the other two, which 

 are positioned closely on each side of it and quite similar to each 

 other. 



Colour. — General appearance marbled dark brown. Micro- 

 scopically showing a yellowish stratum, thickly dotted over with 

 rounded areas composed of black granules. 



Length. — Largest specimen measured 9 mm. {yz-mch). 



Occurrence. — From fresh-water reedy pools beside a tiny runnel 

 joining the MuUum MuUum Creek, Ringwood, near Melbourne. 



Remarks. — It is remarkably active ; usual form of locomotion 

 running, but can spring forcibly forwards, and also swim easily. 

 It shuns strong light. 



References. 



G. M. Thomson — Description of a Remarkable Schizopod. Trans. Linn. 

 Soc, Zool. (2), vi., 3. 



W. T. Caiman — On the Genus Anaspides, Trans. Roy. .Soc. Edinburgh, 

 xxxviii., pt. iv. 



