STATION LIST 147 



St. WS. 825. 28-29. i- 32- From 50" 50' S., 57° 13' W. to 50° 50' S., 57° 17-5' W., net attached to trawl, green 

 sand, mud and shells, 135 m. 



Pseiididothea bonnieri Ohlin. 

 St. WS. 839. 5. ii. 32. From 53° 29-5' S., 63° 31' W. to 53° 31' S., 63° 27' W., commercial otter trawl, fine sand 

 and mud, 503 m. 



Pseudidothea bonnieri Ohlin. 

 St. WS. 871. I. iv. 32. 53° 16' S., 64° 12' W., small beam trawl, 336-341 m. 



Edotia bilobata Nordenstam, Pseudidothea bonnieri Ohlin. 

 St. MS. 25. 13. iv. 25. East Cumberland Bay, South Georgia, 4! cables north-east to i\ cables north-west of 

 Hobart Rock, small beam trawl, 36 m. 



Glyptonotus antarcticiis Eights, Pseudidothea bonnieri Ohlin. 

 St. MS. 71. 9. iii. 26. East Cumberland Bay, South Georgia, 9I cables east-by-south to \z miles east-by-south 

 of Sappho Point, small beam trawl and tow-net of coarse silk, 1 10-60 m. 



Edotia oculopetiolata sp.n. 

 MS. 3. viii. 26. Crawling on female Blue Whale, Saldanha Bay, South Africa. 



Paridotea ungulata (Pallas). 

 9. ix. 26. Walvis Bay, ectoparasitic on Trigala capensis. 



Idotea indica Milne Edwards. 

 1927. Brought up on anchor chain S.S. 'Saragossa', Admiralty Bay, King George Island. 



Glyptonotus antarcticus Eights. 

 Jan. 1927. Borge Bay, South Orkneys, fish trap (W. C. Rumboles). 



Glyptonotus antarcticus Eights. 

 28. X. 28. Picked up on beach of King Edward's Point, South Georgia. 



Glyptonotus antarcticus Eights. 

 25. V. 30. At Anchor, Houtjes Point, Saldanha Bay, hand lines, 12 m. 



Idotea indica Milne Edwards, Paridotea ungulata (Pallas), Synidotea hirtipes (Milne Edwards). 

 I. X. 30. Capetown Docks, on ship's side. 



Paridotea ungulata (Pallas). 

 17. ii. 31. Leith Harbour, South Georgia, hand line, 5 m., from fish stomach, found in boat after fishing with 

 lines, probably Notothenia rossii. 



Glyptonotus antarcticus Eights (incomplete specimen). 



MORPHOLOGY OF THE VALVIFERA 



There are several morphological characters in the Valvifera which need further elucidation. 



(i) In 1939 I pointed out that in the Isopoda the 'only type of coxal plate so far recognized is one 

 developed on the outer side of the joint and extending to the lateral and even dorsal surfaces of the 



body Apart from the development of brood lamellae, the possibility of a corresponding coxal 



expansion of the inner border of the joint appears to have been overlooked, and yet examination of a 

 number of Isopod types suggests that such a development does occur.' 



Subsequent work has confirmed and amplified this statement. Ventral coxal plates seem to be 

 characteristic of all the known families of the suborder Valvifera, with the possible exception of the 

 Amesopodidae.* These plates are present in both sexes on the inner ventral side of the coxal joint 

 of each of the thoracic limbs; they extend inwards towards the mid-ventral line, where each meets and 

 may become fused with the corresponding plate from the opposite limb. Their development may be 

 correlated with the typical flattening of the body, the cylindrical shape of the Astacillidae being 

 undoubtedly secondary (Sheppard, 1939, p. 173)- 



In the breeding females, however, ventral coxal plates as such appear to be absent from the limbs 

 bearing brood lamellae, although a specialized condition is met with in some species of Edotia (see 



* I have been unable to identify them in Amesopous richardsonae Stabbing, the only species of the family, hut this may have 

 been due to the small size of the specimen. 



