270 ME. J. E. JDTJEEDEN ON 



considerable numbers all round tbe island, at a deptb of two or 

 more feet, within crevices of coral-rock. In "The Actiniaria 

 around Jamaica" (1898), I identified it as tbe Hoploplioria 

 coralligens of H. V. "Wilson (1890), transferring it at the same 

 time to the genus Lebrunia. 



The chief characteristic of this genus is the presence of four 

 to eight dichotomously branched outgrowths (pseudo-tentacles) 

 from the uppermost region of the column. They occur im- 

 mediately external to the tentacles, and usually bear spheroidal 

 batteries of nematocysts. 



Dr. "Wilson's species was founded upon a single specimen, 

 about 2 mm. in diameter, discovered in a hole in the coral-rock 

 on the Bahama reefs. There appears to be the closest external 

 resemblance between the Jamaican and. the Bahaman examples ; 

 and anatomical and histological examination supports this, even 

 to the peculiar forms of the nematocysts, and an exceptional 

 arrangement in separate bands of the endodermal muscle of the 

 columnar outgrowths. Comparisons made with the Bahaman 

 Leh-unia described by Prof. McMurrich (1889), and with the 

 Jamaican representatives of the genus, also show a close agree- 

 ment ; hence, in the paper above mentioned, I stated (p. 457) 

 that "it is possible that it may be but a young form of 

 L. neglecta" 



When I first came upon the Jamaican polyps specimens were 

 sent to Prof. "Wilson for his opinion as to their similarity with 

 his species, and he obligingly writes as follows : — " In your 

 preserved specimens the pseudo-tentacles Imve a noticeably 

 different appearance from those of my single specimen. The 

 white nettle-batteries so conspicuous in my specimen are not 

 obvious in yours. I note though that you find them conspicuously 

 outlined in the living animal. The pseudo-teutacles in your 

 specimens are much larger and more flaccid than in mine. All 

 slight and variable points of difference. I make no doubt they 

 are the same provided your sectional study shows the internal 

 anatomy and histology to be alike in your specimens and in 

 mine." 



Prof. McMurrich (1893, p. 133) has expressed the opinion that 

 "Wilson's species is identical with Viatrix globulifera, Duchassaing. 

 But in the description and figures given by Duchassaing and 

 Michelotti (1860) of this Guadaloupe species the columnar 



