1923] Clark, Echinoderms from Lower California 163 



Holothuria monacaria (Lesson) 



Holothuria (Psolus Oken) monacaria Lesson, 1830, 'Cent. Zool.,' p. 225. 

 Holothuria monacaria Jaeger, 1833, 'De Holoth.,' p. 24. 



A small holothurian, 60 mm. long from Pichilingue Bay, east coast 

 of Lower California, seems to represent this Indo-Pacific species, although 

 it has not previously been recorded from the coast of America. A much 

 smaller specimen, 15 mm. long, with no locality label other than "Lower 

 California," is too young for certain identification, but may, for want of a 

 better place, be referred to this species. I have little doubt however, 

 that when the genus Holothuria is critically and carefully revised, the 

 range of true monacaria will not include the western coast of America. 



