150 SELECTED NOTES FROM 



Fig. 3. — Mandibles and labium (with its palpi) of Lipeurus pelagicus 

 (Louse of Stormy Petrel) (after Denny) : — lb. , Labium ; lb}). , 

 Labial palpus. 

 ,, 4. — Mouth of Body Louse, human, Pedicidus vestme}di, in 

 different positions. 



a, haustellum withdrawn. 

 6, partially protruded. 



c, exhibiting the lateral horny hooks. 



d, with the setiferous sheaths. 



(Also after Denny.) 



PLATE XIV. 



Illustrating the structure of Flustra fuliacea. 

 Fig. 1. — Portion of the Polypidom, as seen with a low power. 



,, 2. — Sketch to show the animal protruding from one of the cells, 

 with the ciliated tentacula, x 50; r.m., Retractor muscle, 

 for drawing it back into its cell. 



,, 3. — Portion of the Polypidom, magnified 50 diam. o.c. in Figs. 

 1 and 3, represent Ovicells. 



,, 4. — Vertical section, transverse, of the polypidom, showing the 

 openings in the cell-wall, whereby vital connection is main- 

 tained between all parts of the structure. 



,, 5. — Vertical section, ^e;t(/^/ii(;is6, indicating the same details; o.o. 

 in Figs. 4 and 5, openings. 



PLATE XV. 



Lower Half. 

 Fig. 1. — Hrematopinus suis, ^. 

 ,, 2. — Anterior leg, more enlarged. 

 ,, 3. — Antenna. 

 , , 4. — Haustellum. 



Selccteb Botee from tbe Societ?'0 

 motcvBook6. 



INORGANIC. 



Dendritic Spots on Paper.— Several short notices and an 

 article on this subject will be found in " Science-Gossip," vols. 4 

 and 5. It appears that some authors have supposed these spots to 

 be an Alga, others a Fungus. The former have named it Con- 



