5j3 THE RABBIT chap. 



B. In tlic Iciualc. The wide nn'iio^cnila/ tunai with its vascular 

 ^\<llls. 



Sketch the eutii-e dissection. 



Make a median longitudinal incision through the urinogenital canal, 

 and continue it forwards until the cavity of the bladder is exposed ; slit 

 open the vagina and one of the uteri and Fallopian tubes in the same 

 \va)'. Note and indicate on your sketch the openings of the ureters into 

 the bladder, the connection of the neck of the bladder with the urino- 

 genital canal, the large aperture in the latter leading into the vagina, 

 and the thick-lipped aperture (os nteri), communicating between the 

 \agina and thick-walled uterus, between which and its fellow is a vesti- 

 gial septum, indicating the primarily paired character of the vagina. 

 Insert a seeker into the ccclomic aperture of the P'allopian tube. If the 

 uteri contains embryos they present a series of swellings ; cut each 

 swelling open from the ventral side, and note the foetus attached to a 

 discoid //tJi"(7//(7 (p. 524) ; remove each fcetus, together with its placenta, 

 and preserve it in corrosive sublimate (p. 135). Microscopic sections of 

 the ovary should be examined, and the hollow oz'isacs noted, each 

 consisting of follitiihr ceils enclosing a minute ovu/n. 



With a scalpel or razor cut across one of the kidneys through the 

 liilus, parallel to the dorsal and ventral faces of the organ, and note the 

 /I'/tv'.r, and its jirolongations — the calii-cs, the nriiiary pyramid^ and the 

 LOiihal and 7iiednlla)'y porlions. Sketch, Examine also microscopic 

 preparations of injected and uninjected kidney (compare p. 146). 



X. Dissect out the luiiilto-saa-al plcxKs in the pelvic cavity (p. 515), and 

 then cut through the body just behind the diaphragm ; the abdomen 

 will be no longer recjuired, but you should retain one of the hind-limbs 

 if you w ish to exaniine any of its muscles and joints (compare p. 64). 



E- Dissection of the thorax and neck. 



I. Dissect awa)' the pectoral muscles, cut through all the vertebral 

 riljs of the left side, except the last live, at about a quarter of an inch 

 Irom their junction with the sternal ribs : from the posterior end of the 

 incision thus made, cut downwards (i.e., towards the sternum) for about 

 an inch, and then forwards, through the sternal ribs. Turn forward 

 the tlaji thus separated and carefull)' dissect it awa}' from the underlying 

 tissues at the anterior end, so as to detach il altogether without injuring 

 the jugular and brachial veins. Note in the llioianc <<f.-7Vj' thus laid 

 open : — 



I. The bcriuirdiiiin and licaii, and the //lyiiiiis. 



