BY W. A. HASWELL, M.A., B.Sc. 189 



species the posterior prolongation of the seventh thoracic segment 

 is described and figured as conical, and the posterior lobe as bifid. 



Genus Cymodocea, Leach. 



Cymodocea bidentata, sp. nov. 



Body clothed with slender hairs which are scanty on the anterior 

 thoracic segments, but longer (some about one-sixteenth of an 

 inch) and more abundant on the abdomen and uropoda. Head 

 strongly convex, smooth. First segment of the thorax longer 

 than the two following together, ornamented with faint longi- 

 tudinal lines of minute granules ; lateral border strongly ridged ; 

 antero -lateral angle acute, postero-lateral rather blunt. Following 

 thoracic segments more or less distinctly granular. First 

 abdominal segment distinctly granular, produced backwards 

 towards the middle dorsal line, with a short thick process on 

 either side. Terminal segment with two large tubercles near the 

 middle and a transverse line of three more near the distal extremity. 

 Terminal notch wide, the median process prominent, broad, 

 rounded at the extremity. Basal joints of the inner antennae 

 oblong, granular, separated by an acute frontal process ; second 

 joint small ; flagellum about equalling the peduncle in length. 

 Outer antennae longer than the inner. Inner ramus of the uropoda 

 longer than the outer, obliquely truncate, each terminating in a 

 small acute spine. Length ^ inch. 



Hah. Griffiths' Point, Victoria. 



This species bears some resemblance to 0. Latreillii of Leach, 

 but the blunt form of the terminal lobe, as well as the shape of 

 the uropoda etc., sufficiently distinguishes it. 



Cymodocea trispinosa, sp. nov., PL ILL, fig. 7. 



Surface nearly smooth. Greatest breadth nearly half the length. 

 First segment of the thorax scarcely so long as the second and 

 third together. Outer border of all the thoracic segments ridged ; 

 epimeron of last segment produced backwards into an uncinate 



