534 PROF. F. J. BELL ON HOLOTHUROIDS. [JuUC 23, 



HoLOTHURiA s^cuLARis, sp. nov. (Plate XLV. fig. 6.) 



Body elongated, stout, covered with scattered spicules, which are 

 not numerous and not much more common on the ventral than the 

 dorsal surface. Mouth slightly ventral in position. 



The body-wall is very thick (as much as 6 millim.) and is some- 

 what wrinkled in spirit ; the stone-canal is as much as 34 millim. 

 long ; there is one Polian vesicle ; the pieces of the oesophageal ring 

 are stout and deep ; the genital tubes arborescent. Cuvierian organs 

 appear to be absent. The spicules are numerous, small, with well- 

 marked knobs, and ordinarily three pairs of holes ; there are no turri- 

 form bodies. 



Colour light stone speckled with white. 



135 millim. long ; 45 millim wide. 



110 milhm. long ; 40 millim. wide. 



Angola. 



The apparently complete absence of turriform bodies from among 

 the deposits of this species is remarkable. 



HoLOTHURiA VICTORI.E, (Plate XLV. fig. 7.) 



Body elongated, tapering a little posteriorly, soft to the touch ; 

 suckers closely packed in middle ventral line, rarer at sides and 

 above. Mouth ventral. 



The radials of the oesophageal ring with a semicircular notch ; 

 large Polian vesicle ; stone-canal 36 millim. long ; body-wall rather 

 thick. The genital tubes, digestive tract, and possibly the Cuvierian 

 organs have been ejected. 



Turriform bodies numerous ; base with four central large and a 

 varying number of smaller holes ; spire with only one transverse bar ; 

 no flat plates or supporting spicules. 



Colour light brown above, lighter below. 



Length of single specimen 137 millim.; greatest breadth 34 

 millim. 



The locality given is " Australian seas " ; as the specimen was 

 purchased from Dr. Bowerbauk, it is possible that the exact locality 

 was Freniantle, W. Australia, whence Dr. Bowerbank did receive a 

 large number of specimens. 



In the key given by Dr. Lampert this new form will stand with 

 H. intestinalis and H. magellani; from the latter it may at once be 

 distinguished by not having the suckers arranged in rows, and from 

 the former by the form of the spicules. 



EXPLANATION OF PLATE XLV. 



Fig. 1 . Characteristic spicules of Cucumaria sancti-johannis. 



2. „ „ C. hicolor. 



3. ,, „ C. inconspictta. 



4. „ „ Holothuria wliitmmi. 



5. „ „ H. kapiolanicB. 



6. „ „ H. scBctilaris. 



7. „ „ H. victoria. 



Fig. 4 is magnified 330, fig. 6 440, the others 220 diameters. 



