234 Annals of the South African Museum. 



Delagoa Bay, Portugese East Africa. Oct. 1912. K. H. Barnard coll. 

 1 specimen. 



P.F. 12405-c. Itongazi River, Natal, N.\V. 3 /,, \Y.. 3 miles. 25 fms. 

 Sand and stones. 1 young specimen. 



THALASSOMETRIDAE. 

 * CROTALOMETRA MAGNICIRRA. 



Antedon magnicirra, Bell, 1905. Mar. Inv. South Africa, vol. 4, p. 141 ; pi. 4. 

 Cro/alometra magnicirra, A. H. Clark, 1909. Proc. Biol. Soc. Washington, 



vol. 22, p. 80. 



This species is not now in the South African Museum, the original 

 specimens having apparently all been retained at the British Museum. 

 It was taken in 300-450 fms., 15-20 miles oil" the coast of Cape 

 Colony, near East London. 



PACHYLOMETRA SCLATERI. 



Antedon sdateri, Bell, 1905. Mar. Inv. South Africa, vol. 4, p. 140 ; pi. 3. 

 Pachylometra sdateri, A. II. Clark, 1909. Proc. Biol. Soc. Washington, 



vol. 22, p. 21. 



This characteristic species is represented in the present collection 

 by an armless adult specimen and a number of quite young indivi- 

 duals. The latter were rather puzzling owing to the small centro- 

 dorsal and the relatively long 1 BR series, and the presence in every 

 case of just ten arms. On the other hand, the cirri are essentially 

 like those of the adult (XV-XV1, 15-17) and the I BR series and 

 lower brachials are distinctly wall-sided and in close apposition. The 

 radials are conspicuous, the height being equal to half the breadth, 

 while in the adult specimen they are not only completely concealed 

 but even 1 BRj is barely visible. The adult specimen has the calyx 

 about 12 mm. in diameter and the cirri 18-20 mm. long, while the 

 young ones are only 2 mm. in diameter through calyx and the cirri are 

 but 4-6 mm. long. It is to be regretted that the condition of the 

 adult does not permit of a full description for Bell's account is utterly 

 inadequate. In the young specimens, PI is stiff, erect with 7 seg- 

 ments and P a is similar. P 2 is a little longer, with 9 segments; 

 ,P6, the same. P 3 (and P c ) is a little longer, with 11 segments and 

 is more flagellate at the tip. Subsequent pinnules are shorter. 



P.F. 12872. East London, Cape Colony, N. 15 miles. 310 fms. 

 Mud. 1 adult specimen, with arms all broken off. 



* Those species marked with an asterisk are not represented in the South 

 African Museum collections. 



