HOLOTHURIA. 35 



Plate III. — Large specimen laid open^ and most of the internal organi- 

 zation removed — from a preparation by Mr Goadby. Reduced. 



Plate IV. — Internal organization of the Holothitria pentactes, as in a 

 preparation by Mr Goadby. Tentacula contracted, a. Ampulla 

 Poliana, b. Intestinal canal, c. Portion of the ropes of the 

 ovarium, e. 



Plate V. — Intestinal organs exposed. Stomach everted, a. Intestinal 

 canal, b. Mesentery, c. Portion of the respiratory tree, d. 

 Muscular ligaments of the cloaca, e, — from a preparation by Mr 

 Goadby. 



Plate VI. — Respiratory organs as dissected and prepared by Mr Goadby. 

 Orifice of the cloaca, a. Muscular hgaments, b, securing the cloaca 

 to the parietes of the body. Obtuse extremities of the tubular 

 organs, c. Ligaments securing the trunks to the parietes, d. 



Plate VII. — Ovarium of the Holothuria pentactes, from a dissection by 

 Mr Goadby. 



Plate XII. 



Fig. 1 . Small Holothuria. 



2, Scales upon the skin, a. Scale enlarged, h. 



§ 2. Holothuria fusds. — The Spindle Sea Cucumber or Stveepwater. 

 —Plates VIIL, IX., X., XL, XII. 



On the 18th of November, a specimen was recovered from the 

 north-eastern part of the Frith of Forth. It is of some consequence to 

 date the leading incidents of natural history as done in these pages, both 

 because intervals of time are the grand regulators of the world, and the 



