4 W. T. CALMAN. 



CUMELLA AUSTRALIA 



(Figs. 7-13 on Plate.) 



Description of adult female. Total length, 2 '9 mm. Carapace large, about four- 

 ninths of the total length, compressed, its greatest width little more than half its 

 length. Seen from the side, its vertical height is about two-thirds of its length ; 

 the dorsal edge is strongly arched and serrated throughout its length. There are 

 about twenty large teeth, with some smaller teeth between and beside them, 

 especially in the posterior part. The anterior tooth of the dorsal crest is elevated 

 above, and overhangs the ocular lobe, which is sub-globular and prominent. The 

 pseudorostrum is short, vertically truncate and slightly oblique, the pseudorostral 

 plates meeting in front of the ocular lobe for a distance equal to about half the 

 diameter of the latter. As seen from the side, the fronto-lateral suture has a strong 

 sigmoid curve ; the antennal notch is wide and semi -circular ; the antero-lateral 

 angle is rounded and strongly serrated. The third of the free thoracic somites is 

 produced dorsally into a pair of stout teeth, closely approximated in the middle 

 line, curved upwards as seen from the side, and overhanging the following somite. 

 The abdomen is a little shorter than the cephalothoracic region, the somites stout 

 and cylindrical. The third maxillipeds resemble those of C. pyymsea, but the 

 basipodite has about four teeth, the distal one very strong, on its inner margin. 

 The meropodite also bears a stout tooth internally, and the carpopodite has a 

 smaller one at the distal end of its inner edge. The first legs (fig. 9) are rather short 

 and stout, about three-quarters the length of the carapace ; the basipodite is about 

 two-thirds the length of the remaining segments, with five strong teeth on the 

 distal part of its outer edge, and one on its inner edge. The second legs (fig. 10) are 

 very similar in proportions and armature to those of C. pygmsea. The third legs 

 (fig. 11) have the basipodite slender and curved, longer by one quarter than the 

 remaining segments together. The carpopodite is nearly twice the length of the 

 meropodite, and 1^ times as long as the propodite. The fourth legs (fig. 12) are 

 similar to the third, but the fifth are much shorter. The basipodite is about two- 

 thirds the length of the remaining segments. The uropods (fig. 13) have the 

 peduncle a little less than twice the length of the last somite. The inner edge is 

 serrated, beginning at about one-third of its length from the base, the serrations 

 diminishing in size distally. The endopodite is about two-thirds the length of the 

 peduncle, and carries a terminal spine of half its length. Its inner edge is serrated, 

 and bears two (perhaps three) short spines. The exopodite is two-thirds the length 

 of the endopodite, and has a long and slender terminal spine. 



Occurrence: 'W.Q., May 26, 1903.' 1 specimen. 



Remarks: This species appears to be sufficiently distinguished from the three 

 known species of Cumella by the larger carapace, with its strongly arched dorsal 



