472 ON SOME NEW AUSTRALIAN MAEINE ISOrODA, 



Eocinela vigilans, sj). nov., Plate XVI., fig. 2. 

 Posterior thoracic segments broader tlian tlie anterior ; epimera 

 produced behind to an acute point. Terminal segment sliield-like, 

 smooth, margins entire, ciliated. Eye occupying all the upper 

 surface of the head, and extending on its under surface on either 

 side nearly to the margins of the buccal orifice. Antennso 

 separated at the base by a short frontal process ; the superior 

 about half the length of the inferior, the two basal segments of 

 its peduncle together equal in lengtli to the third segment ; the 

 flagellum longer than the peduncle, composed of about fifteen 

 articuli ; inferior pair with the flagellum more than twice the 

 length of the peduncle. Maxillipedes with the terminal joints 

 plate-like, a strong spine at the internal and distal angle of the 

 first. Posterior thoracic limbs rather longer than the anterior 

 pairs ; femora long-ovate ; dactyla rather short. Eami of caudal 

 appendages unequal, the inner longer and broader than the outer ; 

 both ovate, obtusely pointed, ciliated on the margins. Length 

 1 inch. 



ffah. Holborn Island, near Port Denisou, 20 fathoms (a single 

 specimen). 



Si^hDcroma aspera, sj). nov., Plate XVI., fig. 3. 



Body covered with larger and smaller granules. Head trans- 

 verse, rounded in front, with a narrow lobe between the bases of 

 the antennce ; first segment of the thorax as broad as the four 

 following ; a sliglit depressed line marking oft' the epimera. Pirst 

 segment of the abdomen with distinct lines marking the position 

 of the coalesced segments, a prominent tubercle on the posterior 

 margin on either side of the middle line. Last abdominal segment 

 sub-triangular in contour, dilated anteriorly and ornamented with 

 two slightly convergent irregular rows of minute tubercles ; the 

 apex rounded, with a rectangular notch on either side near the 

 extremity. Caudal appendages with the rami rather unequal, 

 the outer the smaller, both broad, sub-acute. Inner antennae 



