398 



Both these specimens are females bearing eggs ; the 

 larger is 8 mm. long and 7 mm. broad, the other being very 

 slightly smaller. They are thus rather larger than the single 

 male specimen obtained by the "Challenger," the dimensions 

 of which Beddard gives as 5 mm. long and 5 mm. broad. 

 The specimens agree closely with the description given by 

 Beddard in having the body almost circular and rostrum 

 short, the head with three blunt tubercles on the posterior 

 margin and the following segments with a blunt median 

 tubercle on the posterior margin, the free segments also 

 having a lateral tubercle on the tergal portion close to its 

 junction with the epimeral portion. The characters of the 

 pleon and of the uropods are in close agreement with Bed- 

 dard's description. 



Both specimens, however, differ slightly in having 2 or 3 

 small tubercles on each side of the first free segment and of 

 the next 2 or 3 segments, the tubercles being arranged in a 

 row near the posterior margin much as in S. tuberculoma, 

 though they are less marked than in that species. Beddard 

 makes no mention of these in his single male specimen, and 

 it is possible, therefore, that they are found in the female 

 only, or perhaps they were not developed in his slightly 

 smaller specimen. 



The ventral surfaces of the first three pleon segments 

 are nearly straight, and are not produced into teeth, as in 

 the preceding species. 



Serolis baker i, n. sp. 

 Figs. 12-14. 



Encounter Bay, 20-30 fathoms, 2 males, 3 females with 

 eggs (Dr. J. C. Verco). 



These specimens from Encounter Bay come very near to 

 the previous species, S. minuta, and they may be only a variety 

 of it, but in one or two characters they differ from the descrip- 

 tion given by Beddard, and I am provisionally describing 

 them as a new species. They are rather smaller than the 

 specimens of S. minuta, one of the ovigerous females being 

 6 mm. long and 5 mm. broad; the males are approximately 

 the same size as the females. 



The head agrees with Beddard's description of S. 

 minuta in bearing three blunt, rounded tubercles near the 

 posterior margin. The following segments of the body have 

 the posterior margins straight, or very nearly so, and there is 

 no indication of the blunt, median tubercle except to a very 

 slight extent in the third pleon Segment. The lateral 

 tubercles, or processes, which are situated on the tergal por- 

 tion of each segment near the junction with the epimeral 



