70 "ENDEAVOUR" SCIENTIFIC RESULTS. 



out that this form differs from the others in sufficient points 

 to warrant its being considered a separate variety, if not a 

 species. Similarly the form from South Africa, with several 

 teeth on each lobe of the telson, which I described in 1912, 

 has been considered by Barnard to be sufficiently distinct 

 r<> !>< recognised as a separate species under the name 

 P. caucus is (Dana). Further discussion of the various 

 forms is given by Barnard (1916, p. 183), who includes 

 Atyloides tuayellanica Stebbing (1888, p. 925, pi. 79) as a 

 synonym of P. ca pens is (Dana). 



The "Endeavour" specimens all appear to belong to the 

 variety megalophthalma, which may be distinguished by the 

 very large eyes, the presence of a distinct rostrum (Fig. 

 8 a), the shorter and more triangular carpal joints of the 

 gnathopoda (Fig. 8 6), the broader rami of the third 

 nropods and the absence of setae from the telson (Fig. 8 c) . 



The accessory nagellum seems to vary, as might be ex- 

 pected. In the specimens from Port Jackson that I have 

 examined it is almost indistinguishable and apparently 

 fused to the last joint of the peduncle; in the "Endeavour" 

 specimens it is fairly distinct as in typical specimens of the 

 species. 



Stebbing considers Atylus microdeuteropus Haswell from 

 Port Jackson to be a synonym of Amphitoe (Iphimedia] 

 simplex Dana from Hermit Island, and says that the species 

 is probably identical with P. austrina Bate. There is very 

 considerable resemblance between the descriptions and 

 figures given by Dana and Haswell, and it is probable they 

 were describing the same species, but the enlargement of 

 the joints of the nagellum of the first antenna mentioned 

 and figured by each seems to me to be too marked and too 

 widely separated "every third or fourth" (Haswell) to 

 apply to P. austrina, in which every second joint is dilated 

 but only to a slight extent, and' the species more probably 

 belongs to the genus Pontogeneia. 



MELITA FRESNELII (And). 

 Melita fresnelii, Stebbing, 1906, p. 423, and 1910, p. 596. 



Locality. Sanders Bank, Kangaroo Island, 28 fathoms. 

 Several specimens (male and female). (Reg. No. E. 4855.) 



This widespread species appears to be fairly common in 

 Australian seas. The specimens examined agree well with 

 the description given by Stebbing in 1906, though the num- 

 bers of teeth on the posterior margins of the pleon segments 

 do not appear to be constant. 



