62 



ANATOMICAL XOTES ON THE HELICIDJ5, 



The measurements are as follows : — 



Crow — Females, eight-tenths to an-inch in length by one-seventy- 

 fifth in breadth. 

 „ Males, four-tenths by one one-hundred-and-fiftieth. 

 Butcher-bird — Females, seven-tenths by one-seventy-fifth. 



Males, three-tenths by one one-hundred-and-fiftieth. 

 Soldier-bird — Male, three-tenths by one one-hundred-and-eightieth r 



Podargus strigoides harbours haematozoa, two were examined 

 and the blood of both abounded with embryo-filaria. 



In the areolar tissue beneath the skin and under the fascia of 

 muscles of some soldier-birds and the two specimens of Podargus 

 examined, there were peculiar encysted nematoid worms much 

 resembling Trichina spiralis but larger. If the adult filarias of 

 birds are placed in water, spirit of wine or chloroform, they at once 

 rupture themselves, but, if put into Miiller's fluid they die without 

 rupturing. 



March 10th, 1889. 



ANATOMICAL NOTES ON THE HELICIDiE; 



By C. HEDLEY. 



Thersites richmondiana P. Jr. — The jaw of this species is strongly 

 arcuate ; ends slightly attenuated, blunt ; crossed by about 11 flat 

 ribs, broader than their interstices, denticulating the anterior but 

 not the posterior margin ; the centre rib not projecting as a 

 denticule but abutting on a sinus. In some specimens the ribs 

 exhibit a tendency to divide into smaller riblets. The jaw, if 

 extracted from the animal, contracts at once into a horse-shoe 

 shape. 



Of the radula, the rachidian tooth consists of a broad ovate 

 single cusp, which sometimes does, and sometimes does not, project 

 over the posterior edge of the basal plate. This type is repeated in 

 the first dozen laterals, after which the point of the cusp becomes 

 rounded, and denticules appear which gradually increase till an 

 irregular trifid cusp is offered by the extreme marginals. 



