304 AUSTRALIAN MALACOSTRACA. 



The somewhat mutilated specimen from which the above 

 description was taken, was in the Australian Museum collection 

 without locality attached, but pinned on a sheet of cork together 

 with a number of specimens from Tasmania, and perhaps came 

 from that colony. It differs from A. Baffinii, Sabine, as figured by 

 Milne-Edwards, in the great length of the terminal segment of 

 the peduncle of the outer antenna} the fourth and fifth segments 

 being repi-esented as sub-equal in the figure of that species. 



523. Arcturus brevicornis. A.M". 

 Arcturus brevicornis, Haswell, 1. c, p. 195, pi. iv., fig. 5. 

 Head rather shorter than the first three segments of the thorax, 



smooth ; first three segments of the thorax subequal, short, each 

 with one or two minute, rounded tubercles above ; f ourth segment 

 much elongated, with a tubercle above between the anterior end 

 and the middle. Abdomen as long as the last three segments of 

 the thorax. Outer antennae thick, about as long as the head and 

 first four segments of the thorax, second and third segments 

 sub-equal, fourth the longest, fifth longer than the second ; fourth 

 and fifth each with three or four short setso below ; flagellum 

 about two-thirds of the length of the last segment. Anterior 

 limbs subequal, slender, first slightly stouter than the rest. 

 Length of body about f ths in. 



Off Broughton Island, near Port Stephens, dredged in about 

 twenty-five fathoms. 



Sub-Family Antli urines. 



Abdominal opercula not closely appressed to the ventral 

 surface of the body, but free and partly covering the sides of 

 the abdomen. 



G-enus Paranthura. 

 Like Anthura, except in the structure of the pleon which has 

 the several segments distinctly articulated with each other, and 

 carries the normal number of pleopoda. 



524. Paranthura australis. 



Paranthura australis, Haswell, 1. c, p. 177, pi. xviii., fig. 1. 



Eyes very minute. Antenna? extremely short, with rudimen- 

 tary llagella, the internal pair rather the longer. Eirst pair of 



