628 " THETIS " SCIENTIFIC RESULTS. 



gins converge slightly upwards, and the inner margin at the top 

 projects inward a small well-marked blunt process. 



The uropods agree so closely with Professor Haswell's figure of 

 these appendages in his /. punctatus that the identification is 

 tolerably secure. The rami of the first two pairs very nearly agree, 

 though the outer ramus of the first is rather longer than that of 

 the second pair. All are strongly fringed with spines and have 

 besides a microscopic spinular fringe. The third uropods have a 

 short peduncle, produced on the inner side, probably as a support 

 to the large foliaceous inner ramus, which is as long as that of 

 the first pair and broader, fringed with spines and carrying seme 

 on its surface rather near the base. In contrast to this the little 

 oval outer ramus, with a single small spine on the outer margin 

 near the apex, does not even reach the end of the peduncular 

 process. The telson appears to be more rounded than in the other 

 forms. It has a pair of spinules on the convex distal margin. 

 This species, without being longer than the preceding, is broader 

 and more robust. 



Locality. — Off Coogee. 



ICILIUS AUSTRALIS, Haswell. 



(Plate lix.c.) 



Station 57. 



Icilius australis, Haswell, Proc. Linn. Soc. N. S. Wales, iv., 1879, 

 .p. 274, pi xii., tig. 2, a, b, c. 



This form is the bulkiest of the three, and so far conforms to 

 the ideal suggested by Professor Haswell's original figure of 

 /. australis. The head is of great width with the eyes very 

 prominent. The back is devoid of median processes, but the first 

 two pleon segments are postero-laterally double-toothed. Also 

 they have numerous spinules on or near the hind margins of 

 these segments, which were not to be detected in the other forms. 

 In the fifth peraeopods the large second joint's hind margin forms 

 quite a narrow bulge at the top, and then descends with sinuous 

 sweep to the two subequal teeth below. The fourth joint is very 

 broad and strongly spinose. 



The pleopods have the peduncles more dilated below than those 

 of /. punctatus, and in the third pair the outer margin shows a 

 fringe of spines much stronger than those present in the species 

 ust named. 



The first and second uropods were not in good condition, the 

 inner ramus was wanting to the third, but here the outer ramus, 

 though shorter than the peduncle, extended beyond it and 



