234 Transactions. — Zoology. 



The long straight trachea, whose rings only partially surround it, 

 divides into two short bronchi, eaxsh of which ends in a large cavity. The 

 lungs are two long thin sacs, with partly transparent walls. The walls have 

 on their inner face a few villous-like projections. There is in each lung this 

 one large cavity, therefore the bronchi do not divide or subdivide as in the 

 higher animals. Each lung is one-and-three-quarter inches in length, each 

 lies in close contact with the stomach. No thymus or thyroid. 

 Female Generative Organs. 



In the first tuatara the whole of the abdomen and pelvis was filled with 

 two parallel rows of eggs. There vv^ere five eggs in each row. All were 

 about the same size, and appeared in the same stage of development. One 

 was deep in the pelvis, and this seemed a trifle larger than the others. Its 

 end too Avas sharper, and it was longer than the others : it was evidently 

 being moulded ere being extruded, just as is the head of the human foetus. 

 These eggs were five- eighths of an inch in length, with theu' thin ends 

 pointing towards the cloaca, and extended from the heart to the pelvis. 

 They present a most curious appearance. All the other organs seemed 

 squeezed and pushed aside by them,. The space occupied by two eggs 

 is equal to that occupied by the other abdominal viscera. The oviducts, 

 firm white tubes, with constrictions dividing each Qgg from the others. 

 Each oviduct is attached by a long, thin, black process of peritoneum 

 to the spine ; but this is long enough to allow the eggs to rest on the 

 abdominal ribs. 



In the space between these ligaments lies the spinal lobe of the liver. 

 Each egg is covered with a thick dense membrane, composed of closely- 

 interwoven bands of fibrous tissue, and lined by a thinner and smoother 

 membrane. Each egg consisted of an oily-looking fluid, and lying in this 

 a large dense yellow portion. In the eggs kept in spmts this portion was 

 coagulated and granular. In the other specimen, where the eggs were far 

 less developed, the dense internal portion alone was visible. The ovaries 

 are two thin flattened bodies, attached by peritoneums to the ribs near the 

 junction of abdomen and thorax. Each ovary contained great numbers of 

 very small eggs, flattened by x^ressure against each other. 



Bladder, large hoUow viscus, extending half-an-inch above the pelvis, 

 and opening into the cloaca. Gilnther says that the males have no 

 " intromittent copulatory organ." Most Lacertilians have a double or bifid 

 penis ; the geckos have none. On account of the absence of a penis and 

 a membrana tympani, Professor Peters proposes to class them with Agamidce. 

 Dr. Gtinther's description of the anal scent-gland in the males applies 

 exactly to the females. 



