190 



" THETIS " SCIENTIFIC RESULTS. 



The third lateral spine is the largest and more distinct than 

 the same spine in G. corallicola, Haswell. 



*GALATHEA CORALLICOLA, Haswell. 



Galathea corallicola, Haswell, Proc, Linn. Soc. N.S.W., vi., 1882, 

 p. 761 ; Aust. Mus. Cat., v., Crust., 1882, p. 161. 



In the type specimen the rostrum is 0*8 mm. long and 0-55 mm. 

 wide at the base ; it is slightly depressed, longitudinally grooved, 

 and somewhat inflexed at the sides. The tips of the gastric 

 spines reach to the base of the rostrum. 



The ischium joint of the third maxillipedes is equal to the 

 merus; the former has the inner and outer borders setigerous and 

 a rather large spine at its inner distal angle ; the outer is 

 obliquely produced but is rounded at the extremity. The anterior 

 (cutting) ridge bears twenty-five denticles ; four or five are also 

 present in the same line on the preceding joint, but they are very 

 small and ill defined. 



The inner border of the merus is armed with two stout spines, 

 one near the middle and the other midway between it and the 

 distal margin ; the outer border has three spinules, of which the 

 distal one is the largest ; the carpus is also armed with three or 

 four small spinules on its outer border. 



Length of carapace (rostrum excluded) ... 4'5 mm. 



Breadth of carapace... ... ... ... 5 



Length of right chelipede ... ... ... 17 '5 



,, merus ... ... ... ... 5 



,, carpus ... ... ... .. 3 



,, hand ... ... ... ... 7 



,, mobile finger ... ... ... 3 



*GALATHEA ACULEATA, Haswell. 



Galathea aculeata, Haswell, Proc. Linn. Soc. N.S.W., vi., 1882, 

 p. 761 ; Aust. Mus. Cat., v., Crust., 1882, p. 162. 



The type of this species, from Holborn Island, has the striae 

 very prominent and well defined. On the anterior half of the 

 carapace they consist of a series of short curved ridges, and form 

 a neat symmetrical pattern, whilst those on the posterior are 

 long and continuous from side to side. There are four main ridges, 

 posterior to each in the median space, and there is a series of short 

 strai£{ht isolated ridges. 



