374 THE ANATOMY OF VEETEBEATED ANIMALS. 



tendon of which divides in the sole into the four perforating 

 tendons. There are three lumbrioales, and four pair of inter- 

 ossei [flexores breves). There is no proper tibialis posticus, 

 but a muscle arises from the upper part of the inner face of 

 the tibia, internal to, and in front of, the insertion of the pop- 

 litasus, becomes tendinous about the middle of the leg, passes 

 behind the inner malleolus, and runs along the inner and dor- 

 sal aspect of the second metatarsal to be inserted into the ex- 

 tensor tendons. It seems to stand in the same relation to the 

 second digit as the peroruxus qidnti, on the opposite side of 

 the pes, to the fifth digit. The peronmus longus is inserted 

 into the base of the second metatarsal : & peronmus hrevis, p. 

 quarti, and^. quinti digiti, are present. There is no extensor 

 hallucis longus, nor any extensor brevis digitorum. 



The principal characters of the brain of the Rabbit have 

 already been described (see p. 60, and Figs. 21 and 22). 

 There is a single large corpus maminillare. Of the corpora 

 quadrigemina, the nates are larger than the testes. There is 

 a very large and completely-exposed flocculus, and the vermis 

 is large in proportion to the lateral lobes of the cerebellum. 

 The corpora trapezoidea are well marked. 



The membrana nictitans is very large, has a convex free 

 edge, and contains a triangular cartilage. There are no 

 puncta lachrymalia, but a cresoentic aperture leads into the 

 lachrymal canal. The large lachrymal gland lies above and 

 external to the eyeball, and there is a well-developed Harde- 

 rian gland on its lower and inner side. 



The dental formula is i. -j^j- c. ^ p.m. jr^ fn. jr^ =: 28. 



The lower, and the inner upper, incisors are very large and 

 long ; thej grow continuously from persistent pulps, and they 

 are coated with enamel only in front, so that wear keeps them 

 constantly sharp. The second pair of small incisors exists 

 only in the upper jaw. A -great diastema separates the inci- 

 sors from the first premolar above and below. The grindiug- 

 teeth all grow from persistent pulps, and do not- form fangs ; 

 they have transversely-ridged crowns, the patterns of which 

 are very similar throughout, the first and the last only pre- 

 senting some differences. The young Rabbit has three inci- 

 3oi's and three milk-molars on each side, in the upper jaw. In 

 the lower jaw, there are only two milk-molars on each side. 



The stomach is simple, and there is a large cseoum. Spe- 

 cial glands pour their secretions at the side of the anus. 



The pancreas is very large, and its duct enters the intea 



