34 Annals of the South African Museum. 



forward pointing tooth rises, the upper edge of which is con- 

 tinued in a carina almost to the end of the carapace ; the 

 pleon is carinate from the second to the end of the sixth 

 segment without any tooth-like extension. The sixth segment 

 is rather longer than the furcate telson, the fork of which is 

 fringed with 22 graduated spines. The palpless mandible 

 has a cutting edge of 12 teeth, one of them minute, the largest 

 double. The middle plate of the first maxilla is fringed with 

 13 spines, the inner plate has only armature on one corner, 

 the palp, not abruptly narrowed, carries 8 setae. The first 

 peraeopod has 3 spines on the inner margin of the fourth 

 joint, the second 19 on the corresponding margin, with 7 on 

 the margin of its second joint, of which Miss Kathbun only 

 says that it " is armed with a small spine at the distal end of 

 its inferior margin." Total length of specimen in median line 

 103 mm., the carapace accounting for 33 mm., the sixth pleon 

 segment 13 - 5 mm., and the telson 11'5 mm. 



Locality. Cape Natal N. by E. 24 miles (Natal) ; depth 

 440 fathoms. A 1254. 



FAMILY HIPPOLYTIDAE. 



1910. Hippolytidae, Stebbing, Ann. S. African Mus., vol. 6, pt. 4, 

 p. 390 (with synonymy). 



GEN. SAEON, Thallwitz. 



1891. Saron, Thallwitz, Zool. Anzeiger, vol. 14, p. 99. 



1906. ,, Caiman, Ann. Nat. Hist., Ser. 7, vol. 17, p. 30. 



Caiman, in his provisional synopsis of the family Hippo- 

 lytidae, distinguishes this genus as having arthrobranchiae at 

 the bases of the first four pairs of peraeopods, mandibles with 

 incisor process and palp, more than seven jointlets in the 

 wrist of the second peraeopods, and a movable spine at the 

 base of the second peraeopods. 



SARON MARMORATUS (Olivier). 



1811. Palaemon marmoratus, Olivier, Encycl. Meth., vol. 8, p. 665. 

 1852. Hippolyte gibbosus, Dana, U.S. Expl. Exp., vol. 13, p. 565, 



pi. 36, fig. 4a-c. 

 1891. Saron gibberosus, Thallwitz, Zool. Anzeiger, vol. 14, p. 99. 



