240 



DISCOVERY REPORTS 



I give the following notes on the present specimens. 



Gnathopod i, 2nd joint distally lobed in both sexes. Gnathopod 2, 2nd joint distally 

 lobed in both sexes. Lower margin of 6th joint in c? forming with the palmar ridge an 

 even curve, but separated from it by a rounded notch; the hind margin and the palmar 

 ridge (but not the notch) is minutely crenulate. The setae are mostly arranged in fascicles 

 and are simple. In the younger <$<$ there is a distinct step between the palm and the 

 hind margin, both of which are crenulate ; in other words, the long flat tooth on the palm 

 has attained its full development. In a 17 mm. <$ from no. 2 the palmar ridge or rect- 

 angular tooth is much shorter, not reaching the hinge, and therefore projects as a 

 prominent flat tooth or tubercle. 



Uropod 3, peduncle with three stout spines on distal margin medianly, and two near 

 inner angle ; inner ramus with a stout apical spine, and a row of four to five smaller ones 

 nearer the outer margin. 



Fig. 150. Ampithoe brevipes (Dana), a. Gnathopod 2 o, with palm further enlarged (St. 56). 

 b. Palm of gnathopod 2 of young (J (St. 56). c. Palm of gnathopod 2 of (J (St. 53). d. Uropod 3. 



The colour of no. 2 is given as: "Pale green throughout, with pink eyes". 



Stebbing (1906) remarks that brevipes is very near to femorata. 



Comparison of these specimens with the South African ones which I identified as 

 brevipes (1916) shows that they are not the same species. The absence of apical lobes 

 on the 2nd joints of the gnathopods, the perfectly smooth lower margin of the 6th joint 

 in gnathopod 2 of the S, with its plumose setae, as well as the details of the 3rd uropods 

 serve to distinguish the South African form, which I therefore call Ampithoe falsa, n.sp. 

 (Barnard, 1916, p. 255, pi. xxviii, fig. 34, brevipes, non Dana). 



Distribution. Tierra del Fuego; Falkland Islands. ? Valparaiso (peregrina). 



Ampithoe? brasiliensis (Dana). 



Bate, 1862, p. 248, pi. xliii, fig. 3. 

 Stebbing, 1906, p. 637. 



Occurrence:!. St. 1. Ascension. Three specimens 4-4-5 mm. 

 2. St. 2. Ascension. Four specimens 3-5 mm. 



