Contributions to the Crustacean Fauna of South Africa. 327a 



a notable difference in size in Sphaeromids ; specimens from the 

 (colder) west coast of the Cape Peninsula being larger than those of 

 the same species from the (warmer) east coast. 



Throughout the present paper I have adopted the plan of counting 

 seven peraeopods, instead of two gnathopods and five peraeopods, in 

 the Isopoda Anomala as well as the Isopoda Genuina. 



The types of all the new species are in the South African Museum. 



For answering my inquiries and giving me advice on certain points 

 I am under obligations, and wish herewith to express my thanks 

 to: Dr. W. T. Caiman of the British Museum, Dr. C. Chilton of 

 Christchurch, N.Z., Dr. H. J. Hansen of Copenhagen, and Dr. W. M. 

 Tattersall of Manchester. To Dr. Lampert and Dr. von Lorenz 

 I am especially indebted for entrusting respectively Krauss' and 

 Heller's specimens to me for examination. To my friends Mr. 

 J. H. Orton of the Plymouth Marine Laboratory, Mr. F. W. Edwards 

 of the British Museum, and Mr. H. Watson of Cambridge, I wish to 

 express my thanks for copying descriptions and tracing figures in 

 works otherwise inaccessible to me. 



FAMILY APSEUDIDAE. 



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



1910. ,, Stebbing, Tr. Linn. Soc. Lond. Zool. vol. 14, pt. 1, 



p. 85. (References.) 



GEN. APSEUDES, Leach. 



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



1902. Stebbing, S.A. Crust, pt. 2, p. 48. 



1905. Richardson, Bull. (J.S. Nat. Mus. No. 54, p. 37. 



1907. ,, Nobili, Mem. Ace. Torino, ser. 2, vol. 57, p. 411. 



1911. ,, Richardson, Bull. Mus. d'Hist. Nat. 1911, No. 7, 



p. 518. 



1912. id. Proc. U.S. Nat. Mus. vol. 42 (1912), p. 583. 



1912. id. ibid. vol. 43 (1913), p. 159. 



1913. ,, Hansen, Danish Ingolf-Exp. vol. 3, pt. 3, p. 10. 



APSEUDES DELTOIDES, n. sp. 

 (Plate XXVII. B.) 



Body widest across the carapace which is composed of the head 

 and 1st peraeon segment fused. Rostrum triangular with denticu- 

 late margins, the denticulations being quadrate and regular near the 



