SYSTEMATIC REPORT 91 



St. 406. 5. vi. 30 (day). Off Roman Rock, Cape Peninsula, South Africa, 29 m., 1 adult & 3 adult ?$ (2 ovig.), 



4 juv. $?. 

 St. 423. 3. ix. 30 (night). Off Port Elizabeth, South Africa, 56-0 m., 28 <$<$, 6 $?, 2 juv. 



St. 424. 4. ix. 30 (night). Off Port Elizabeth, South Africa, 59-0 m., 12 adult <$£, 4 juv. <$<$, 27 adult $?, 5 juv. $?. 

 St. 443. 23. ix. 30 (night). West-south-west of Port Elizabeth, South Africa, 49-0 m., 34 adult <$<$, 5 juv. <2c?, 



27 adult $$ (5 ovig.), 4 juv. $$. 

 St. 444. 24. ix. 30 (night). West of Cape Peninsula, 80-0 m., 13 adult <$$, 10 adult ?$ with empty brood sacs. 

 St. 844. 8. iv. 32 (night). Just south of Cape Town, 155-0 m., 2 imm. cJ(J, 6-5 and 5-5 mm. 



Distribution. Up to the present this species has only been recorded with certainty on two occa- 

 sions — both from surface water off Cape Town (G. O. Sars, 'Challenger' 1883 and Zimmer, 1912, 

 p. 10). Eight of the nine stations at which it was taken by ' Discovery ' and ' Discovery II ' are situated 

 off the southern shores of South Africa from Port Elizabeth to Cape Peninsula. At five of these stations 

 it was captured in night hauls and it is interesting to note that the three hauls in which it was taken 

 by daylight were all taken very close in shore. Its occurrence off Cape Lopez considerably extends 

 its known geographical range to the northward. The species is a shallow-water form and all the 

 captures were made at the surface or in vertical hauls from depths of 155-49 m. to the surface. 



Subfamily Mysinae 

 This subfamily is very rich in genera and for convenience it has been divided by Hansen (1910, 

 p. 12) into four Tribes, Erythropini, Leptomysini, Mysini and Heteromysini. 



u Tribe ERYTHROPINI 



1910 Hansen, p. 13. 



Definition. Antennal scale usually with the proximal portion of the outer margin naked and 

 terminating in a tooth. In a few genera the scale is reduced or even absent. Thoracic endopods gene- 

 rally with carpus distinct, unsegmented and separated from the propodus by a more or less oblique 

 articulation (transverse in Arachnomysis). Propodus usually subdivided into two segments by a trans- 

 verse articulation. Pleopods of the male well developed, fourth pair with the exopod slightly elon- 

 gated in a few genera and occasionally armed with modified setae. 



Of the twenty-seven genera which are already included in this Tribe, fourteen are represented in 

 the Discovery material and I have added one new genus. 



Genus Pseudomma G. O. Sars, 1870 

 1870 Psuedomma G. O. Sars, p. 154. 

 1870-9 Psuedomma G. O. Sars, vol. I, p. 47. 

 1930 Psuedomma Illig, p. 571. 



This genus may readily be recognized by the distinctive form of the eyes. These are rudimentary 

 with no trace of visual elements or pigment and are united in the median line to form a broad, flat, 

 hemispherical plate on the dorsal surface of the head, covering all or part of the bases of the antennular 

 peduncles and antennae. The anterior and lateral margins of this plate may be either more or less 

 serrated, or unarmed. In the anterior median line there is a well-defined cleft, indicating the line of 

 fusion of the two rudimentary eyes which make up the eyeplate. 



The antennal scale is unarmed along the proximal portion of its outer margin, the naked region 

 terminating in a more or less strong tooth; the apex of the scale is very varied in the genus, being 

 greatly produced in some species, while in others it is actually shorter than the thorn terminating the 

 outer margin. 



