12 



mm. 



1-5 





2-3 





6-5 





4-5 





2-3 





2-1 





3 





6 





232 " THETIS " SCIENTIFIC RESULTS. 



both rami have their distal borders crenate, spinose and sparsely- 

 ciliated. 



Total length of body ... 

 Length of cephalon ... 

 Breadth of cephalon ... 

 Length of peraeon 



Greatest breadth at the fifth segment 

 Length of pleon 

 „ ,, telson 



„ first leg 



„ sixth leg 



Colour. — Body yellpwish- white, uniformly spotted with dark 

 brown. 



Four examples were obtained at Station 44 off Coogee Bay, in 

 49-50 fathoms. 



MG^A ANGUSTATA, sp. nov. 



(Fig. 21«-/.) 



Station 57. 



Body evenly punctate, narrow, elongate, nearly three times as 

 long as broad without the telson. Cephalon more than twice as 

 broad as long, acutely pointed in the middle and evenly rounded 

 at the sides. First segment a little shorter than the cephalon, 

 slightly longer than the second and third, which are equal, and are 

 each as long as the fifth and the sixth ; fourth segment much the 

 longest, twice as long as the seventh. Epimera of the first three 

 segments evenly rounded posteriorly, the lower border of each bears 

 a small subterminal lobe ; fourth, fifth and sixth subacute ; the 

 lower border convex in the anterior half, and straight posteriorly ; 

 seventh somewhat obtuse, with the upper and lower terminal 

 borders oblique. Pleon segments subequal in length, the fourth 

 and fifth slightly wider than the first and second ; posterior 

 lateral angles short and subacute. Telson broader than long, 

 equal in length to the first four segments of the pleon ; the upper 

 surface bears an ill-defined median and a pair of lateral ridges ; 

 the latter are confined to the distal fourth, and rather indistinct ; 



