Contributions to the Crustacean Fauna of South Africa. 321 



extraordinary results obtained by a system of careful sieving on board 

 the Danish exploring vessel " Ingolf " may be quoted : 



" . . . a considerable quantity of the mud hauled up by dredge 

 or trawl . . . was sifted under water in smaller portions in a 

 sieve clothed with silk gauze No. 7 used by millers. ... In this 

 way hundreds of small animals as Tanaidacea, AseUota, etc., were 

 gathered. Other deep-sea expeditions could certainly have arrived at 

 corresponding results if their methods of dealing with the bottom 

 material had been more satisfactory ; it may be considered quite 

 certain that hundreds of species of small Crustacea, etc., lived in the 

 bottom material hauled up by the "Challenger" and later great 

 European and North American expeditions, and were flushed again 

 into the sea." 



In connection with the subdivision of the Valvifera some general 

 remarks are made on the morphology of the male sexual appendages. 



In conclusion I would beg indulgence for any slips which may have 

 crept in. The paper has been prepared during the period of the war, 

 when it has been impossible to avail myself of the kindness of my 

 friends and correspondents in England and elsewhere, who have helped 

 me so much in the preparation of my previous papers by copying 

 figures and descriptions from works not to be found in this countiy. 



The MS. of this paper was completed before Hausen's 1916 paper 

 reached me, and therefore the discussion of several points of morpho- 

 logical interest has had to be postponed for a future occasion. 



FAMILY APSEUDIDAE. 



1880. Apseudidae Sars, Arch. Naturg. Christian, vol. 7, p. 6. 

 1910. ,, Stabbing, Tr. Linn. Soc. Lond. zool. vol. 14, pt. 1, 



p. 85 (references). 



1913. Nierstrasz, Siboga Exp. monogr. 32a, p. 3. 



GEN. APSEUDES Leach. 



1814. Apseudes Leach, Edinb. Encycl. vol. 7, p. 404. 



1914. Barnard, Ann. S.A. Mus. vol. 10, pt. 11, p. 327 a 



(references) . 

 1914. Vanhoffen, Deutsch. Sudpol. Exp. vol. 15, pt. 4, p. 461. 



APSEUDES AVICULARIA Brnrd. 

 1914. Apseudes avicularia Barnard, I.e. p. 329a, pi. 27A. 



Since this species was described from a single 9 specimen, two ^ 

 specimens have come to light. They agree with the original specimen 



