TEMNOPLEURIDAE— ECHINIDAE 217 



Centrostephanus sp. (young) 



St. 283. 14. vii. 27. Annobon, Gulf of Guinea, 18-30 m. 5 specimens. 



These specimens are probably the young of C. longisphius (Philippi) ; but they are too 

 young to be identified with certainty as belonging to this species, the young stages of 

 which are unknown. They are of sizes 4-8 mm. h.d. ; no genital pores are formed as yet. 

 The spines are banded, brownish and white. 



Family TEMNOPLEURIDAE 



Genocidaris maculata, A. Agassiz 



Temnocidaris maculata, A. Agassiz, 1872. Revision of the Echini, p. 286, pi. viii, figs. i-i8. 

 Genocidaris macidata, Mortensen, 1903. Danish 'Ingolf Exped. Echinoidea, i, p. 84, pis. vii, 



figs. 24, 30; viii, fig. 7. 

 G. maculata, Doderlein, 1906. Deutsche Tiefsee-Exped. Echinoiden, p. 198, Taf. xxv, fig. 2; 



XXXV, fig. 13; xlvi, fig. 4. 

 G. maculata, H. L. Clark, 1925. Cat. Recent Sea-Urchins Brit. Mus., p. 76. 



St. 279. 10. viii. 27. Off Cape Lopez, French Congo, 58-67 m. i specimen. 



The specimen is a young one, only 4 mm. h.d., with as yet no genital pores. But I see 

 no reason to doubt that it is really this species which has already been recorded from off 

 the Congo by Doderlein {op. cit.). 



Family ECHINIDAE 



Sterechinus Agassizii, Mortensen 



(Plate II, figs. 11-16) 



Sterechinus Agassizii, Mortensen, 1910. Swedish South Polar Exped. Echinoidea, p. 42, 



pis. vi, figs. 9-12; vii, fig. 3; xvi, figs, i, 7-8, 13, 15, 18. 

 Echinus margaritaceus, H. L. Clark, 1912. Hawaiian Echini. Pedinidae . . . Echinoinetridae, p. 262. 

 E. diadema, H. L. Clark, 1925. Cat. Recent Sea-Urchins Brit. Mus., p. 113. 

 For references to literature prior to 1910 I may refer to my work on the Echinoids of the 

 Swedish South Polar Expedition, loc. cit. 



St. 27. 15. iii. 26. West Cumberland Bay, South Georgia, no m. 2 specimens. 



St. 39. 25. iii. 26. East Cumberland Bay, South Georgia, 179-235 m. 7 specimens. 



St. 42. I. iv. 26. Off mouth of Cumberland Bay, South Georgia, 120-204 m. 2 specimens 

 (young). 



St. 146. 8. i. 27. 53° 48' S, 35° 37' W, South Georgia, 728 m. Several specimens. 



St. 157. 20. i. 27. 53° 51' S, 36° 11' W, South Georgia, 970 m. 4 specimens. 



St. 158. 21. i. 27. 53° 48' S, 35° 57' W, South Georgia, 401-41 1 m. 16 specimens. 



St. 160. 7. ii. 27. Near Shag Rocks, South Georgia, 177 mm. 8 specimens. 



St. WS 27. 19. xii. 26. 53° 55' S, 38° 01' W, South Georgia, 107 m. 5 specimens. 



St. WS 86. 3. iv. 27. 53° 53' S, 60° 34' W, South Georgia, 151-147 m. 5 specimens. 



St. WS 91. 8. iv. 27. 52° 53' S, 64° 37' W, South Georgia, 191-205 m. i specimen. 



St. WS 93. 9. iv. 27. 7 miles S 80° W off Beaver Island, West Falkland Islands, 133 m. 4 speci- 

 mens (young). 



St. WS 97. 18. iv. 27. 49" 00' S, 61° 58' W, 146 m. I specimen. 



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