A MONOGRAPH OF THE EXISTING CRINOIDS 451 



Albatross station 5477; in the vicinity of Surigao Strait, between Samar and 

 Leyte; Tacbuc Point (Leyte) bearing S. 87 W., 11 miles distant (lat. 10 44' 45" N., 

 long. 125 12' 30" E.); 88 meters; gray mud; July 29, 1909 [A. H. Clark, 1911] (2, 

 U.S.N.M., 35036, 35038). 



Albatross station 5401; north of Cebu; Tanguingui Island Light bearing N. 79 

 W., 23 miles distant (lat. 11 24' 45" N., long. 124 06' 00" E.); 55 meters; fine sand; 

 March 16, 1909 [A. H. Clark, 1911] (3, U.S.N.M., 35056). 



Geographical range. From the Lesser Sunda Islands to New Guinea, and north- 

 ward to the Philippines and the Macclesfield Bank. 



Bathymetncal range. From 18 to 290 (?400) meters. The average of 14 records 

 is 98 meters. 



Thermal range. One record, 16.89 C. 



History. This was one of the two species of Actinometra referred to by Car- 

 penter in 1879 as being "very abnormal." The other was Comaster multifida, and 

 the details of his reference to these two forms are given under that species. 



At the same time he remarked that there were in the Challenger collection 

 three species of Actinometra in which the anterior arms are longest, although all 

 the arms, anterior and posterior alike, are grooved and bear tentacles. He never 

 subsequently referred to this statement or indicated what the three species were. 

 One of them, however, was the present form. The two others were forms now 

 regarded as synonyms of Comanthus timorensis and C. parvicirra. 



This species was originally described by Carpenter in 1888 from a single speci- 

 men which had been dredged by the Challenger in the Philippines. 



In 1911 I recorded a number of specimens from 4 Albatross stations in the Phil- 

 ippines and compared the species with Comaster serrata and with C. parvus ( = brevi- 

 cirra). 



Having examined the material in the British Museum in 1910, I announced 

 in 1912 that Bell's Antedon brevicirra, described in the Spinijera group, is in reality 

 the species previously described by Carpenter as Actinometra distincta. This was 

 an error. Bell's Antedon bretncirra is the species I described in 1909 under the 

 name of Comaster parvus. 



One of the 6 specimens of Actinometra parvicirra dredged by the Challenger at 

 Zamboanga and identified by Carpenter proved to be this species. This record 

 was corrected in 1912, and again in a paper on the crinoids of the British Museum 

 published in 1913. 



In 1918 I recorded this form from 7 stations in the Dutch East Indies, at which 

 it had been dredged by the Siboga. 



COMASTER SERRATA (A. H. Clark) 



Plate 52, Figure 154 

 [See also vol. 1, pt. 2, fig. 698 (disk), p. 341] 



Comatula serrata A. H. CLARK, Proc. U. S. Nat. Mus., vol. 33, 1907, p. 154 (description; Albatross 



station 4895); p. 685 (listed). 

 Comaster parvicirra A. H. CLARK, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 306 (2 localities in Sagami 



Bay); vol. 39, 1911, p. 533 (Sagami Bay specimens really C. serrata). 



