SYSTEMATIC REPORT 117 



Remarks. This new species closely resembles G. philippinensis in the shape of the telson, the num- 

 ber and arrangement of the spines arming it and in the proportions and shape of the antennules and 

 antennae. In G. philippinensis the outer margin of the scale ends in a strong thorn, but in many 

 species a thorn in this position does not appear until the animals are fully grown, and its absence in 

 G. megalops may be merely due to immaturity. 



Fig. 26. Gibberythrops megalops sp.n. A, anterior end of immature male in dorsal view, x 28; B, telson and left 



uropod, x 28; C, apex of telson (enlarged). 



G. megalops can at once be distinguished from the other species of the genus by the well-developed 

 broad rostral plate, which is produced forward to cover the bases of the eyes and the whole of the first 

 segments of the antennular peduncles, by the presence of a slender spine in the inner margin of the 

 endopod of the uropod, by the relatively greater length of the telson, the length of the apical spines and 

 by the presence of three long plumose setae between them. The most remarkable feature of the 

 specimen is the peculiar form of the eyes but, as this may not be normal, I have relied upon other 

 features for the identification of the species and trust that further specimens may come to light so 

 that the true nature of these organs may be ascertained. 



Distribution. Atlantic Ocean, to the west of Cape Town. 



Genus Meterythrops S. I. Smith, 1879 



1879 Meterythrops S. I. Smith, p. 93. 

 1879 Parerythrops (pars) G. O. Sars, p. 98. 



Remarks. This genus very closely resembles Parerythrops in the general form of the antennules, 

 antennae, eyes, mouth-parts and telson, but differs in the form of the first pleopods of the male. In 

 Parerythrops these appendages are rudimentary as in the female, but in Meterythrops they are as in 

 Erythrops, well-developed, biramous, with the exopod normal and multiarticulate and the endopod 

 reduced to a single segment. 



Meterythrops picta Holt and Tattersall, 1905 



1905 Meterythrops picta Holt and Tattersall, p. 116, figs. 



1906a Meterythrops picta, Holt and Tattersall, p. 23. 



191 1 b Meterythrops picta, Tattersall, p. 28. 



1951 Meterythrops picta, Tattersall and Tattersall, p. 113, figs. 



Occurrence : 



St. 87. 25. vi. 26 (day). West of Cape Town, iooo(-o) m., 2 juv. <J<J, 6-4-7 mm -> l $> I0 mrn - 



St. 89. 28. vi. 26 (day). Off Cape Town, iooo(-o) m., 1 imm. 6*, 9'2 mm., and 2 fragments. 



St. 100. 2. x. 26 (night). West of Cape Town, 475(-o) m., 1 6*> 8-5 mm. 



St. 100B. 3/4. x. 26 (night). Off Cape Town, 1000-900 m., 2 imm. <J<J, 8-0-8-8 mm., 2 $?, 10-4 and 6-4 mm., 1 juv. 



St. 256. 23. vi. 27 (day). West of Cape Town, noo-85o(-o) m., 2 0*6*. 6-5-7-4 mm., 3 ??, 6-4-11 mm. 



