ZOOLOGY OF THE BERMUDAS. 139 



species are of a grayish-white color, but no mention is made by 

 either of the authors above quoted of the existence in the Car- 

 olinian form of the five longitudinal brown bands which extend 

 over the entire length of the Bermudian species. Apart from 

 this, Semper ia Bermudensis differs in the disposition of the ten- 

 tacles, the greater number of Polian vesicles, and the character 

 of the spicular buttons, which are in the greater number of 

 instances strongly knotted. The posterior processes of the 

 calcareous ring appear also to be much more elongated. 



From Semperia (Chtcumaria) pundata, described by Ludwig 

 from the Barbados (Arbeiten aus dem zoolog. zootom. Institute in 

 Wurzburg, ii, 1875, p. 82) the species differs, apart from the gen- 

 eral scheme of coloring tentacles as w r ell as body in the 

 different disposition of the tentacles (9 equal in S. pundata, ac- 

 cording to Ludwig), th6 smaller number of Polian vesicles (5 in S. 

 pundata), and in the much greater number of filaments com- 

 posing the genital bundles. The vent does not appear to have 

 been rayed. 



Ludwig states that there are in his species no calcareous 

 teeth about the anal aperture, whereas Lampert just as posi- 

 tively asserts that they are present (Semper, Philippinen, 1885, 

 p. 152). None such were detected in the Bermudian form. 



STICHOPUS. 



Stichopus diaboli, n. sp. (PI. 13, figs. 1, la, Ib, 2.) 



Body stout, more or less quadrangular, flattened ventrally, 

 and bearing two rows of prominent marginal wart-like, tuber- 

 cles; sometimes two additional rows of minor tubercles are 

 noticeable on the lateral margins of the dorsum. Tentacles 20, 

 unequal. Dorsal papilla scattered, not prominent, leaving the 

 surface nearly smooth. Pedicels and papilke on ventral sur- 

 face arranged in three broad bands, which are more or less dis- 

 tinct for the entire length of the body, but most distinct near 

 the extremities; numerous in each transverse row. 



The body-cavity is largely occupied by the greatly developed, 

 and finely dissected, respiratory apparatus, and by the loops of 



