80 



"ENDEAVOUR" SCIENTIFIC RESULTS. 



The specimen I have dissected agrees with Stebbing's in 

 lacking the decurrent lobe of the basis in the second 

 gnathopod and in having the palm less oblique; the 

 decurrent lobe is, however, not figured by Walker in the 

 Ceylon specimens he refers to P. longicaudata. 



ETTRYSTHEUS MACULATUS (Johnston) 



(Fig. 12.) 

 Enrystheus maculatus, Stebbing, 1906, p. 617. 



Locality. Eastern Slope, Bass Strait. One male (Reg. 

 No. E. 5356). 



This single specimen lacks the antennae and is imperfect 

 in one or two other respects, but it agrees with Stebbing's 

 description in : -the two minute medio-dorsal teeth on the 



fourth pleon segment, the second 

 side-plate being the largest, the 

 bulging of the third pleon seg- 

 ment above the small tooth at 

 the postero-lateral angle, the 

 shape of the second gnathopod 

 which has the basal and carpal 

 joints robust, the palm oblique, 

 slightly concave and provided 

 with two teeth or tubercles, and 

 in the spine at each side of the 

 apex of the telson. I have no 

 hesitation therefore in identify- 

 ing it with the above-named 

 species. It agrees closely with 

 the figures given by Sars of E. 

 erythrophthalma except that the 

 posterior margin of the third 

 pleon segment is more bulging 

 and resembles that of G. 

 melanops, both of these species 

 being considered synonyms of 

 E. maculatus, Johnston, by 

 Stebbing. I have been able to 

 compare it with a female speci- 

 men of E. maculatus from Eng- 

 land with which it closely 

 corresponds. 



Fig. 12. Euri/stlteus maculatus 

 (Johnston), male. Proximal 

 joints of fifth paraeopod 

 showing the widened merus. 



