196 Annals of the South African Museum. 



Geogr. Distribution: Port Jackson, Australia (Haswell); Torres 

 Strait (Miers) ; Kermadec Islands (Chilton). 



MAERA HAMIGERA (Haswell). 

 (Plate XXVII. Figs. 11-12.) 



1879. Mowt luumgera Haswell, Proe. Linn. Soc. N.S.W. vol. 4, 



p. 333, pi. 21, fig. 1. 



1885. Meyant.oera suensis var. id. ibid. vol. 10, p. 103, pi. 15, figs. 1-4. 

 1906. Maera hamigera Stebbing, Das Tierreich, 21, p. 437. 



1909. Walker, Tr. Linn. Soc. Lond. ser. 2, vol. 12, 



pt. 4, p. 335, pi. 43, fig. 5. 



1910. Stebbing, Sci. Pees. " Thetis," pt. 12, p. 600. 



Side-plate 1 with a notch at postero-inferior angle. Posterior 

 margin of 3rd pleon segment with 5-6 somewhat widely spaced 

 serrations. 



Telsonic apices deeply notched, 3 strong spines in the notch, the 

 middle spine nearly as long as the lobe, the other 2 as long, inner 

 margin with 2-3 spiniferous notches. 



First antenna, 1st joint with spine on lower apex, 2nd longer than 

 1st, flagellum ca. 40-jointed, accessory flagellum 5-jointed. Second 

 antenna, ultimate joint shorter than penultimate, flagellum ca. 15- 

 jointed. 



Third joint of maudibular palp a trifle shorter than 2nd. 

 First gnathopod, 4th joint apically acute, palm ill defined, micro- 

 scopically denticulate, set with spines and setae. 



Second gnathopods dissimilar on the two sides, the right larger 

 than the left, in J 4th joint apically acute, hind margin of 6th longer 

 than palm, with one or two setiferous notches near the defining tooth, 

 palm concave between this and the 4-5 denticles near hinge, but with 

 a small tooth in the centre of the concavity, a submargiual row of 4-5 

 stout spines, finger fitting within defining tooth, rather strongly 

 curved and tapering evenly. In a larger specimen, which is otherwise 

 indistinguishable and seems to be the adult form, there are 4 teeth 

 defining the palm, arranged transversely, the largest being on the out- 

 side and a little in advance of the others, the tooth in the centre of 

 the concave portion of the palm is larger and nearer the other teeth, 

 so that the convex portion of palm bears 6 teeth Avhich are well 

 defined and acute ; finger fitting into the concavity, very stout, 

 scimitar-shaped, widening distaily and ending abruptly with a small 

 incurved blunt tooth, inner margin convex except at extreme base. 



