4 BULLETIN OF THE 



the margin of the brim round the body, and are scarcely visible to the naked 

 eye. The dorsal papilla3 are minute, few in number, and probably confined to 

 the ambulacra alone. The mouth is ventral in position, and the anus dorsal. 

 There are twenty (?) tentacles. The color is bluish violet. 



The deposits are scattered, and consist of very regularly formed three-armed 

 bodies, with smooth nearly straight arms forming equal angles with one another 

 and having the ends slightly enlarged and pierced with one or several holes; a 

 long central simple column directed outwardly runs out from the centre of the 

 body and terminates in some minute spines. The calcareous ring is evidently 

 absent or dissolved. Two Polian vesicles 50 mm. long are present. Each of 

 the longitudinal muscular bands is divided into two. The respiratory trees are 

 long and more developed. A bundle of long slender genital tubes is situated 

 on each side of the dorsal mesentery. 



Habitat. Lat. 39° 43' N., Lon. 10° 55' 25" VV. (1880); depth 1002 fathoms ; 

 two specimens. Lat. 38° 16' 45" N., Lon. 73° 10' 30" W. (1880); depth 1186 

 fathoms; one specimen. Lat. 39° 38' 20" N., Lon. 70° 56' W. (1880); depth 

 1241 fathoms; two specimens. 



Stichopus Pourtalesii, n. sp. 



On account of the very defective state of the specimens, it is almost impossi- 

 ble to get an exact idea of their true shape. So far as I can observe, they 

 resemble in all respects Stichopus natans of Sars, except that the ventral sur- 

 face appears to have two kinds of pedicels: small ones, like those of Stichopus 

 natans ; and very wide, wart-like ones, which seem to be placed along the 

 sides of the body. By means of these warts the animals adhere firmly to 

 rocks and stones, so that it seems almost impossible to obtain a perfect exam- 

 ple. The deposits resemble those of Stichopus natans, Sars, but possibly the 

 spire bears longer, more numerous spines on the four vertical rods. Consider- 

 ing the very incomplete state of all the specimens, it is probable that other 

 differences also exist between this species and that of Sars, but for the pres- 

 ent I cannot find any other than the large remarkable wart-like feet which 

 Stichopus Pourtalesii possesses. 



Habitat. St. Kitts (1878-79) ; depth 208 fathoms; fragments of several 

 specimens, Grenada (1878-79); depth 291 fathoms ; fragmentary specimens. 

 Guadeloupe (1878-79); depth 734 fathoms; fragments. (Barbados 1878-79); 

 depth 209 fatlioms ; fragments. Lat. 18° 20' 30" N., Lon. 87° 16' 40" W. 

 (Bartlett, 1880); depth 600 fixthoms ; one specimen. 



Stichopus Johnsoni, n. sp. 



In a contracted state, the animal attains a length of 150 ram. The color 

 is yellowish brown. There are twenty tentacles of the same size and shape. 

 The ventral pedicels are not crowded, and they do not seem to form any well- 



