334a Annals of the South African Museum. 



margin, 6th joint with armature similar to that of $ but the spines 

 all acute. 



Uropods. Both rami extend a little beyond telsonic apex, inner 

 longer than outer, both with long simple setae on outer and inner 

 distal margins. 



Length : 3 mm. 



Colour : Whitish, the head, peraeon segments 1 and 2 and the 

 strongly ^chitinized parts of 4, 5, and 6, and the pleon grey. 



Locality: St. James, False Bay. 15/2/14. (K.H.B.) 23 ( ? ( ?, 

 2 5 5 with embryos, and 4 larvae. Sea Point near Cape Town. 

 15/11/13. 3 larvae, and 26/2/14. 1 $ and 1 ovigerous ? . 

 (K.H.B.) (S.A.M. Nos. A2693, A2611, and A2717 respectively.) 



The original 3 and larvae were found on Holothurians, but 

 both sexes have since been found at St. James living in great 

 abundance in the tubes of a species of Serpulid worm encrusting 

 the rocks near low-tide. The males are far more numerous than 

 the females. They lie in the mouths of the tubes, which they 

 just about fill up, with the head projecting. 



FAMILY ANTHUEIDAE. 



1814. Anthuridae, Leach, Edinb. Encycl. vol. 7, pp. 387-433. 



1886. ,, Norman and Stebbing, Tr. Zool. Soc. Lond. 



vol. 12, p. 119. 

 1900. ,, Stebbing in Willey's Zool. Ees. vol. 5, p. 618 



(Synonymy.) 



1905. ,, Richardson, Bull. U.S. Nat. Mus. No. 54, p. 62. 



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



pt. 1, p. 90. (References.) 



GEN. CYATHURA, Norman & Stebbing. 



1886. CyatJnira, Norman & Stebbing, I.e. pp. 121, 124. 

 1893. ,, Stebbing, Hist. Crust, p. 331. 



1900. ,, id. I.e. p. 619. 



1904. ,, id. Spolia Zeylanica, vol. 2, pt. 5, p. 9. 



1905. ,, Richardson, Bull. U.S. Nat. Mus. No. 54, p. 63. 



CYATHURA ESTUARIA, n. sp. 



(Plate XXVII. D.) 



Body smooth, glabrous. Head as long as broad, half length of 

 1st peraeon segment, anterior margin excavate with median pro- 



