248 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



P, is 17 mm. long and is composed of 50-55 segments. The second-seventh or 

 -eighth segments have slight rounded dorsal processes. The remaining segments are 

 smooth with the distal edge slightly produced, and are not at all or only slightly longer 

 than broad. The 22-25 terminal segments bear large rather pointed teeth which in 

 height equal the width of the segments which bear them. P2 is 13 mm. long. P3 and 

 P4 are somewhat shorter and bear combs. Pj is 12 mm. long with 27 segments and is 

 without a comb. The distal pinnules are 12 or 13 mm. in length and are composed 

 of 25-28 segments. The first 20-25 pairs of pinnules have the proximal segments 

 distally somewhat everted and bearuig small spines. The segments of the distal 

 pinnules are somewhat constricted centrally and have distinctly spinous ends. The 

 terminal pinnulars are provided with weak hooks. 



The disk is 11 mm. in diameter and bears small calcareous granules. The 

 mouth is subcentral. The anal funnel is marginal, small and short, 2 mm. in height. 



The color in formalin is yellowish brown. 



In the second specimen the centrodorsal is flatter and more nearly circular in out- 

 line, 5.5 mm. in diameter. The cirrus sockets are arranged in a partially double row. 



The cirri are broken. The number is about XXX. There remain 5 segments of 

 a cirrus. These slowly increase in length, the fifth segment being about two-thirds as 

 broad as long and slightly constricted centrally. 



The 10 arms are 145 mm. long, most of them being broken. As in the other 

 specimen, there are 16 brachials to 10 mm. 



The distal intersyzygial interval is 3 muscular articulations. 



Pj-Pi bear combs. P4 is 12 mm. long and its comb consists of 22 teeth. The 

 distal pinnules are 14 mm. long with about 30 segments. 



Locality. — Dr. Sixten Bock's station 59; Bonin Islands, eastnortheast of Anojima; 

 183 meters; 1914 [Gisl^n, 1922, 1924]. 



Remarks. — This species is only known from the 2 specimens collected by Doctor 

 Bock in 1914 and described by Gisl^n in 1922. 



COMISSIA PEREGRINA (BeU) 



Plate 24, Figure 65 

 [See also vol. 1, pt. 1, fig. 56 (comb), p. 83; pt. 2, figs. 387, 388 (pinnule tip), p. 245] 



Aclinometra peregrina Bell, Proc. Zool. Soc. London, 1894, pp. 396, 402 (description; Macclesfield 

 Bank, 55-60 fathoms). — Hamann, Bronns Klassen u. Ordnungen des Tier-Reichs, vol. 2, 

 Abt. 3, 1907, p. 1586 (listed).— A. H. Clark, Crinoids of the Indian Ocean, 1912, p. 38 (iden- 

 tity); Smiths. Miscell. Coll., vol. 61, No. 15, 1913, p. 6 (same; redescription). 



Comissia peregrina A. H. Clark, Ann. and Mag. Nat. Hist., ser. 8, vol. 7, 1911, p. 645 (listed, 

 with habitat); Crinoids of the Indian Ocean, 1912, p. 38 (identity); p. 77 (synonymy; detailed 

 description of the type; habitat); Smiths. Miscell. Coll., vol. 61, No. 15, 1913, p. 6 (reference 

 to the specimen in the British Museum; locality; redescription); Unstalked Crinoids of the 

 Siboga Exped., 1918, p. 19 (in key; range; includes C. dumelum). — Gisl^n, Nova Acta reg. 

 Soc. sci. UpsaUensis, ser. 4, vol. 5, No. 6, 1922, p. 22 (comparison with C. p. viagnifica). 



Comissia dumelum A. H. Clark, Proc. U. S. Nat. Mus., vol. 39, 1911, p. 531 (description; Albatross 

 station 5356); Ann. and Mag. Nat. Hist., ser. 8, vol. 7, 1911, p. 645 (listed, with habitat); 

 Crinoids of the Indian Ocean, 1912, p. 77 (synonymy; locality); Unstalked Crinoids of the 

 Siboga Exped., 1918, p. 19, footnote 1 ( = C. peregrina). 



