Bugle Coralline. 73 



24. Bugle Coralline {Salicomaria Farciminoides). 



The Polyzoary is plant-like, erect, calcareous, dividing dicho- 

 tomously, the internodes articulating by flexible chitinous bands 

 instead of being continuous as in the preceding specimen. It is 

 ordinarily about three inches high, and is attached by a fibrous 

 branching root-like base. The cells are arranged quincuncially 

 round an imaginary stem, and divide the surface of the internodes 

 which they make up, into more or less regularly rhomboidal or 

 hexagonal spaces bounded by the raised borders of the cells. The 

 mouth has a tooth on each side at its orifice within its lowest 

 border. The avicularia are distinct from and placed above the 

 cells, but not regularly. Their rostrum is immersed, and their 

 mandible semicircular. No vibracula are present in this species. 

 The ovicells, which are immersed as in the preceding specimen, 

 have here their position frequently identifiable by the presence of a 

 perforation above the mouth. 



For specific characters, see Busk, British Museum Catalogue of 

 Marine Polyzoa, pp. 16-18, pi. Ixiv., fig. 3 ; Fossil Polyzoa of 

 the Crag, p. 23 ; Johnston^s British Zoophytes, p. ^^^, 2nd ed.; 

 English Cyclopaedia, article ' Polyzoa,' p. 420, fig. 4 ; Cam. 

 Heller. Verhand. Zool. Bot. Gesellschaft im Wien, bd. xvii., 

 1867, p. 85. 



25. Larva of Death's-head Moth 



{Acherontia Atropos). 



This and the following five preparations are intended to illustrate 

 the various points of external and internal anatomy, such as the 

 presence of prolegs, the absence of wings, the rudimentary con- 

 dition of the reproductive system, the shortness, large calibre and 

 straightness of the digestive tract, the great development of the 

 salivary glands and of the fat body, in which the larva or pupa, 

 or both differ from the perfect insect. The caterpillar of the 

 Death's-head Moth is the largest of all European species. The 

 greater or less homonomy of its segments from head to tail, and 

 the fact that the segmentation of its legs and antennae is not very 



