clark: brittle-stars. 309 



Ophiactis carnea. 



Ljungman, 1867. Ofv. Kongl. vet.-akad. Forh., 23, p. 324. 



This seems to be the characteristic species of South Africa and is 

 not known from elsewhere. 



Ophiactis African a. 



Koehler, 1911. Ann. Inst, ocean., 2, fasc. 5, p. 17, pi. 3, fig. 4, 5. 



This species has been taken only at two widely separated points 

 (Levrier Bay and Banana) on the west coast of tropical Africa. 



Ophiactis lutkeni. 



Marktanner-Tumeretscher, 1887. Ann. K. k. naturh. Hofmus. Wien, 2, 

 p. 298, pi. 12, fig. 7, 8. 



This is another African species, known as yet only from Fernando Po. 



Ophiactis virens. 



Amphiura (Ophiactis) virens Sars, 1857. Nyt. mag. naturvid., 10, p. 39. 

 Ophiactis virens Liitken, 1859. Add. ad hist. Oph., pt. 2, p. 126. Simroth, 

 1876. Zeitschr. f. wiss. zool., 27, pi. 31, fig. 1-4. 



This is the common and well-known Mediterranean species. 



Ophiactis arenosa. 



Liitken, 1856. Vid med., p. 25. McClendon, 1909. Univ. Cal. publ. Zool., 

 6, pi. 3, fig. 16, 17. 



The Central American and Mexican coast, north to San Diego, 

 California, is the home of this long, but little, known species. 



Ophiactis brachyaspis. 



H. L. Clark, 1911. Bull. 75 U. S. N. M., p. 138, fig. 53. 



The locality of the unique holotype of this species is unfortunately 

 not known. 



