272 ATTSTftAttAIT MALACOSTBACA. 



both armed with a few set*. Fifth pleopoda wanting. Sixth 

 pleopoda short, foliaceous, ovate. Telson simple, squamiform, 

 blunt. Length, inclusive of antennae, 4£ lines. 

 Port Jackson. 



473. Oyrtophium dentatum. 



Cyrtophiwm dentatum, Haswell, 1. c, p. 342, pi. xxii., fig. 5. 



Male. — Two last segments of the pereion, and two first of the 

 pleon projecting in the form of a tooth in the middle dorsal line. 

 Superior antennae as long as the cephalon and pereion; first 

 segment of the peduncle short, second and third twice as long, 

 subequal, -fringed below with long slender hairs ; a short bi- 

 articulate appendage; flagellum rather shorter than the last 

 segment of the peduncle, sex-articulate. Inferior antennae 

 rather longer than the body; first segment of the peduncle 

 short, stout ; second twice as long ; third the longest ; fourth 

 not half the length of the third and slender ; flagellum scarcely 

 as long as the last segment of the peduncle, sex-articulate. 

 Anterior gnathopoda small, with the carpus and propodos sub- 

 equal, the latter sub-triangular, the palm nearly longitudinal, 

 straight ; dactylos armed internally with a few acute teeth ; 

 meros, carpus and propodos with a few slender hairs. Posterior 

 gnathopoda much larger than the anterior ; meros with an acute 

 spine on its posterior border; carpus small; propodos long- 

 ovoid, palmar border armed with three prominent teeth, and 

 fringed with numerous slender hairs ; three setif erous notches 

 on the dorsal border. Two anterior pairs of pereiopoda sub- 

 equal, bordered with setae ; three posterior pairs subequal, longer 

 than the Others, setiferous ; basa long-ovate ; dactyla large. 

 Fourth and fifth pair of pleopoda with the rami unequal — the 

 inner the longer — each armed with a few straight spines. Last 

 pair of pleopoda rudimentary, with one or two setae, almost con- 

 cealed by the telson. Telson prominent, conical, armed terminally 

 with two slender spines. Colour grey or red. Length 2£ lines. 



Port Jackson ; Port Stephens ; Port Molle ; Griffiths' Point. 



474. Oyrtophium minutum. 



CyrtopMum minutvm, Haswell, 1. c, p. 343, pi. xxii., fig. 6. 

 Anterior segments of the pleon slightly produced in the middle 

 dorsal line. Eyes very prominent. Superior antennae as long 



