BY WILLIAM A. HASWELL, M.A., B.SC. 1011 



Fam. ANTHURID^ 

 Paranthura dimenensis. N. sp. 



[Plate LII., figs. 6-13.] 



The head is rather smaller than the fii'st segment of the pereion, 

 compressed from above downwards, nearly square in cntline, with 

 the anterior border concave. The second and third segments are 

 about equal, very little larger than the head ; the following 

 segments of the pereion are both longer and thicker than the first 

 and second, except the last which is rather shorter. The pleon is 

 nearly as long as the penultimite segment of the pereion ; all its 

 segments are quite distinct. Both pairs of antennte ai-e shorter 

 than the head, the inferior pair rather longer than the superior, the 

 latter has six segments, of which the last is very small and there 

 seems to be the rudiment of a seventh : the former has five 

 segments, the last small, ornamented with a fringe of hair. The 

 first thi'ee pairs of thoracic appendages are all sub-cheliform, the 

 first the largest with very stout carpus and propodos : the former 

 triangular, pi'oduced so as to articulate with a considerable part of 

 the ventral boi'der of the carpus ; the pi'opodos with the palm 

 oblique defined by a small spine : the following two pairs are of 

 somewhat similar shape, but rather smaller, the palm undefined in 

 the third, defined only by an obtuse angle in the second. The 

 terminal appendages are rather pointed, ornamented with a small 

 fasciculus of hairs : the telson has a minute notch in the middle 

 behind. The length is half an inch. 



Found at Hobart between tide marks. 



Paranthura crassicornis. 



[Plate LIIL, figs. 8 and 9.] 

 Paranthi(,ra crassicornis, Haswell. Proc. Linn. Soc, N.S.W., 

 Vol. v., p. 478, pi. XVIII., fig. 5 Cat. Aust. Crust., p. 305. 



There is a considerable amount of variation in this species ; 

 particularly in the length of the antennas. In the specimen 

 originally described the inner pair were about half the length of 

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