ZOOLOGY OF THE BERMUDAS. 141 



species) of prominent wart-like processes. Tentacles 18, un- 

 equal, whitish or gray, edged with brown. Dorsal papillse 

 fairly prominent, scattered. Pedicels on ventral surface 

 crowded, arranged in three longitudinal series, five to eight, or 

 more, in each transverse row. 



Body-cavity, as in the preceding, largely occupied by the 

 respiratory tree and the double genital bundle, the filamental 

 processes of the latter much finer than in S. diaboli. Tentacu- 

 lar vesicles present. One (?) Polian vesicle. 



Calcareous bodies, in the form of stools (PI. 13, fig. 3), very 

 numerous C-shaped bodies scarce, in the form of broadly- 

 opened calipers. Ground-color reddish-yellow, irregularly 

 blotched with black or very dark brown. The spots on the 

 ventral surface more or less coalescent in the median line, 

 forming there a broad longitudinal band, or entirely united to 

 form a uniformly dark-colored base ; on the back, united into 

 two irregularly ramifying or wandering bands. 



Length of longest specimen about ten inches ; width about 

 two and a-half or three inches. 



The same habitat as that of the preceding species, although 

 apparently much less abundant. 



I strongly suspect that this is the form which Th6el, in his 

 report on the Challenger holothurians {loc. cit., p. 159), identi- 

 fies with Stichopus Mobii (Semper), one specimen of which, 

 " rather deformed and compressed " when examined by Th6el, 

 was obtained at the Bermudas. I assume the identity in this 

 case, as well as in that of the preceding species, on the ground 

 that the two species here described are the characteristic forms 

 of the archipelago, and it is barely possible that they could 

 have escaped the attention of the Challenger people. But the 

 identification with Semper's species appears to be erro- 

 neous. The resemblance to Stichopus Mobii appears to rest 

 talmos wholly upon the form of the spicules, which are largely 

 similar in many very distinct forms of Stichopus, and in a 

 general scheme of coloring. But Semper distinctly states 

 (Holothurien, loc. cit, p. 246) that the characteristic spots are 



