A MONOGRAPH OF THE EXISTING CRINOIDS 99 



the eversions being finely denticulate; there are 16 arms; following a IIBr axillary syzy- 

 gies occur between brachials 1 + 2 and 3+4. 



In a specimen from 7.5 miles NW. by N. of the Umhlangakulu River the one cir- 

 rus remaining is 70 mm. long with 63 segments; the 20 arms are 80 mm. long. 



In a specimen from Union of South Africa stations 3719-20 the cirri are about 

 55 mm. long with about 50 segments. In an example from Union of South Africa 

 station 4068 the cirrus sockets are arranged in 10 columns of the centrodorsal; the 

 cirri are 65 mm. long with about 60 segments; the 20 arms are 110+ mm. long. 



In a specimen from Union of South Africa station 6244 four of the IIBr series are 

 2 and six are 4(3 + 4). In another specimen from the same station the IIBr series 

 are probably all 4(3+4). 



Localities. Pieter Faure; Buffalo River, East London, bearing N. 15 miles distant; 

 567 meters; coral and mud (12885/6) [Bell, 1905; A. H. Clark, 1908, 1909, 1911, 1912, 

 1913, 1915, 1918; H. L. Clark, 1923; GisleX 1928] (6, B. M.). 



Pieter Faure; Buffalo River, East London, bearing N. W. }'i W. 19 miles distant; 

 548 meters; sand and broken shells (12725) [Bell, 1905; A. H. Clark, 1908, 1909, 1911, 

 1912, 1913, 1915, 1918; H. L. Clark, 1923; Gislen, 1928]. 



Pieter Faure; East London bearing N. W. % N., approximately 20 miles distant; 

 731-823 meters; sand and stones (12792 or 12792A) [Bell, 1905; A. H. Clark, 1908, 

 1909, 1911, 1912, 1913, 1915, 1918; H. L. Clark, 1923; Gislen, 1928] (1, B. M.). 



Pieter Faure; 7.5 miles N. W. by N. of Umhlangakulu River, southern Natal; 91 

 meters; sand, gravel, and sponge fragments (12831) [Gislen, 1938]. 



Union of South Africa stations 3719-20; east of Durban (Port Natal), Natal (lat. 

 2951' S., long. 3128' E.) [Gisten, 1938]. 



Union of South Africa station 4068 [GislSn, 1938J. 



Union of South Africa station 6244; northeast of Durban, Natal (lat. 2934' S., 

 long. 3132' E.) [Gislen, 1938]. 



Geographical range. Southeastern Africa from the vicinity of Port Elizabeth 

 northeastward along the coast to Durban (Port Natal), Natal. 



Bathymetrical range. From 91 to 731 (7823) meters; the average of four records 

 is 552 meters. 



History. This species was described as Antedon magnicirra in 1905 by Prof. 

 Francis Jeffrey Bell from an unspecified number of specimens dredged off East London 

 in 300-450 fathoms (Nos. 12725, 12792, 12885, and 12886). He said that it "appears 

 to stand next to A. [Adelometra] angustiradia of Carpenter's classification"- that is, 

 to be a member of Carpenter's Savignyi group all the species in which belong to the 

 genera Craspedometra and Heterometra. In 1908 I published a note assigning magnicirra 

 to the genus Thalassometra, and remarked that it belongs to the Granulifera group 

 of Carpenter. 



In two papers published in 1908 I listed Thalassometra magnicirra as a character- 

 istic oceanic species. In a revision of the family Thalassometridae published in Jan- 

 uary 1909 I listed Antedon magnicirra among the species I was unable to place satis- 

 factorily. 



When I established Crotalometra later in 1909 I said that Antedon magnicirra 

 is a member of this genus, and in other papers published in the same year I compared 

 Crotalometra magnicirra with the new species C. rustica and C. sentifera. In a paper 



