2 S6 DISCOVERY REPORTS 



Remarks. The separation of colletti, Bov., from this species will probably prove im- 

 possible when more material has been examined on the lines pursued by Mogk (1926). 

 Mogk (1927, p. 125) refers to certain transitional specimens, and the present specimens 

 have the dentition on the lower margin of the hand of peraeopod 3 more like that of 

 colletti, though the proportions of the 4th and 5th joints and of the whole limb are those 

 of pacifica. 



Distribution. Mediterranean; North and South Atlantic, 53 N-9 S; Indo- 

 Pacific. 



Phronima colletti, Bov. 



Vosseler, 1901, p. 32; pi. iii, figs. 8-10; pi. iv, figs. 1-3. 

 Stephensen, 1924, p. 127, chart 18. 

 Mogk, 1927, p. 139, chart 7. 



Occurrence: St. 290. East mid-Atlantic. 1 $ 7 mm. 



Distribution. Mediterranean; North and South Atlantic, 4i°N-35°S; Indo- 

 Pacific. 



Genus Phronimella, Claus. 

 Stephensen, 1924, p. 130. 



Phronimella elongata (Claus). 



Vosseler, 1901, p. 40, text- fig. 

 Stephensen, 1924, p. 130, chart 19. 

 Mogk, 1927, p. 141, charts 9-1 1. 

 Barnard, 1930, p. 423. 



Occurrence: 1. St. 2 20' S, 12 45' W. 1 $ 6 mm. in penult, instar, 2 adult <$<$ 7 mm., 10 $? 

 5-1 1 mm. 

 2. St. 296. East mid-Atlantic. 1 adult <J 7 mm., 4 $$ 9-10 mm. 



Remarks. Mogk has mentioned the changes in the antennae of the <$ at different 

 stages of growth, but has not mentioned a difference in the pleopods. The peduncles of 

 the adult 6* have the very broad ovoid, almost subcircular, shape, which is characteristic 

 of the adult 6* in the genus Phronima. In the penultimate stage, as represented by the 

 6 mm. specimen recorded above, the peduncles are elongate oval, twice as long as 

 wide; in cross-section they are thin, whereas in the adult they are thick and heart- 

 shaped (Vosseler, p. 42). 



The breeding period appears to be August to November in the Mediterranean (Lo 

 Bianco, quoted in Stephensen, p. 133). Stephensen records adult ££ in January to 

 April, June to August, and October and November; Mogk records adult SS in August 

 to October and a preponderance of large-sized (not the largest) ?$ in September. 



Distribution. Mediterranean; North and South Atlantic, 43^-37° S; Indo- 

 Pacific; Antarctic, 63 S, 82 E. 



