systematic report "9 



Occurrence : 



St. 87. 25. vi. 26 (day). West of Cape Town, iooo(-o) m., 3 SS, 6-8-8-4 mm - 



St. 89. 28. vi. 26 (day). Off Cape Town, iooo(-o) m., 1 adult <J, 8-4 mm., 1 juv. <J, 1 juv. ?, fragments. 



St. 100D. 2. x. 26 (day). West of Cape Town, 675-625 m., 1 $, 6 mm. 



St. 256. 23. vi. 27 (day). West of Cape Town, noo-85o(-o) m., 2 $$, 9-6 mm. 



St. 267. 23. vii. 27 (night). West of Orange River estuary, 550-45o(-o) m., 1 juv. S, 4-4 mm. 



St. 700. 18. v. 31 (day). North-east of Cape Verde Is., 2025-0 m., 1 adult & 6-8 mm. 



St. 714. 30. x. 31 (night). Atlantic, east of Montevideo, 246-0 m., 1 $ imm., 7-5 mm. 



St. 1555. 29. Hi. 35 (night). South of South Africa, 1000-0 m., 1 imm. $, 5 mm. 



St. 1575. 24. iv. 35 (night). Between Madagascar and Portuguese East Africa, 800-0 m., 1 juv., 2-5 mm. 



St. 1739. 17. iv. 36 (day). West of Perth, Western Australia, 3000-20oo(-o) m., 1 ?, 6-2 mm. 



St. 1753. 27. iv. 36 (day). North-west of New Amsterdam, South Indian Ocean, 2900-1400 m., 1 $, not fully 



mature, 6-8 mm. 

 St. WS 976. 6. iii. 50 (day). 200 miles west of Walvis Bay, South Africa, 1000-750 m., 1 small juv., 2-5 mm. 



Remarks. The carapace in this species is very thin and membranous and the specimens are not in 

 good condition. As a result the anterior region of the carapace, which is normally inflated, has be- 

 come crushed and distorted in some cases and does not present the characteristic appearance of the 

 types but seems more produced anteriorly. The only other difference shown by these specimens is in 

 the length of the antennal scale. In young specimens the scale is extremely small, but may become 

 proportionally longer in some animals, until it may overreach its own peduncle. I have found among 

 the specimens in the Discovery collection that the scale varies in length, being either shorter than the 

 antennal peduncle or longer by one-fifth of its length. In every case the scale is very delicate and 

 narrow and has the bowed shape described in the type. I do not find that this increase in length is 

 always correlated with the size of the animal and this bears out the observation of Holt and Tattersall 

 (19060, p. 24) that the scale in an adult male of 8 mm. had the same proportions as that shown by 

 the immature type specimens. 



The cornea of the eyes even in preserved specimens is a clear orange yellow and the ocular papilla 

 is well developed. On the label for station 87 there is the following note on colour: 'Cornea of eyes 

 orange. Large dorsal black patch on anterior part of carapace. Last three abdominal somites blackish 

 —otherwise colourless in two specimens. In one specimen pinkish red pigment on anterior 1 and 2 

 (somites) and all thoracic legs.' 



The form of the first pleopod of the male and of the telson is most consistent throughout. 



Distribution. This species is a bathypelagic and mesopelagic form, widely distributed in the 

 North and South Atlantic and in the Indian Oceans. The type was taken off the south-west coast of 

 Ireland and the species has since been recorded from the Azores and Canaries (Hansen), West 

 Atlantic (as K. dactylops) (Illig), South Africa (as K. dactylops) (Zimmer), Bahamas and Bermudas 

 (Tattersall) and the mouth of the Congo and New Amsterdam (Illig). Seven of the ten stations at 

 which it was taken by the ships of the ' Discovery ' Investigations are from the South Atlantic, three 

 in the Indian Ocean, one north-west of New Amsterdam, one west of Perth, Australia, and one from 

 between Portuguese East Africa and Madagascar. 



Katerythrops resimora sp.n. 



Occurrence: 



St. 256. 23. vi. 27 (day). West of Cape Town, noo-85o(-o) m., 1 adult <J with posterior part of pleon missing; 

 2 $$, adult, 9-8 and 10-2 mm. Types. 

 Description. General form moderately robust. Carapace inflated anterior to the cervical sulcus, 

 but not so markedly as in K. oceanae. Rostral plate with the anterior margin almost straight and turned 



