278 RECENT OPHIURANS. 



852. 0. PUSILLA Lyman, 1874. Bull. M. C. Z., 3, p. 235, pi. 3, f. 21-30. 



HoLOTYPE and 2 paratypes. Philippine Islands, 15 fms. 



853. O. QUINQUEMACULATA (Delle Chiaje). 



Aslerias quinquemaculata Delle Chiaje, 1829. Mem. anim. sans Vert. Napoli, 4, p. 197, pi. 68, f . 1 . 

 OphiothHx quinquemaculata Mullee and Thoschel, 1840. Arch, naturg., 6, p. 329. 



47 specimens. ' Mediterranean Sea. France: Cette. Nice. Leghorn; 



Naples. 



854. O. RHABDOTA, sp. nov. (pa/SSw™, striped) . Plate 13, f. 4. 



Disk 13 mm. in diameter; arms about 150 mm. Distinguishable from the 

 various species of the longipeda group only by its coloration. The upper surface 

 of the arms is marked by three longitudinal lines (hence the name), which are 

 yellow in life but become whitish in preserved specimens ; these stripes are usu- 

 ally most distinct near the tips of the arms. The lower surface of the arms 

 is very dark with a wide median stripe, yellowish in life but whitish in preserved 

 specimens. 



Holotype (M. C. Z. 3816) and 6 paratypes (M. C. Z. 3817, 3818, 3876). 

 Torres Strait: Erub; Murray Islands, Mer. Sept.-Oct., 1913. Carnegie Exp. 

 1913. H. L. Clark coll. 



I have hesitated long before adding another species to this perplexing group 

 and the chief justification for doing so is that it is at least easily recognized. 

 Even after several weeks of study of longipeda on the reefs where it is common, 

 I have been unable to decide whether all these large, long-armed examples of 

 Ophiothrix ought to be referred to longipeda or not. I very much doubt the 

 validity of hirsuta, punctolimhata, and galateae, while expedita appears more 

 worthy of recognition. I would maintain for the present at least obtusa and 

 rhabdota but am incUned to believe that further study, with more abundant 

 material, will result in uniting at least four of these nominal species, under the 

 name longipeda. 



855. O. RUDIS Lyman, 1874. BuU. M. C. Z., 3, p. 239, pi. 3, f. 11-14. McClencon, 1909. Univ. 



Cal. publ. Zool., 6, pi. 5, f. 30, 31. 



Holotype and 4 paratypes. California: San Diego. 



856. O. SMARAGDINA Studer, 1882. Abh. K.-Preus. akad. wiss. Berlin, p. 26. Koehler, 1904. 



Mem. Soc zool. France, 17, p. 93, f. 60-63. 



1 coTYPE. Off Northwestern Australia, 50 fms. 



857. 0. SPICULATA Leconte, 1851. Proc. Acad. nat. sci. Phil., 5, p. 318. McClendon, 1909. 



Univ. Cal. publ. Zool., 6, pi. 6, f. 38, 39. 



172 specimens, including 20 cotypes. California: Monterey; 5 miles 



