256 MR. ST. GEORGE MIVART ON [Apr. 22, 
inches. 
Distance from mid-point between the eyes to end of muzzle . “56 
Extreme width of mouth .... 23 see leoo 
Distance from mid-point between the ‘angles of the mouth to 
the mandibular symphysis.. ... ae "65 
Length from angle of mouth ‘s branchial orifiee, dbontrs 1:22 
— branchial orifice to root of pelvic limb, about. . 72 
Proportions. 
Length of head compared with its breadth at 100 ........ 94°10 
Height of head compared with its breadth at 100 ........ 53°88 
——— of body compared with its breadth at 100 ........ 48°82 
Breadth of mid-tail to its height at 100 .. . 46°66 
— of body to its length (without head and tail) at 100 33°13 
Height of body to its length TEIOG® ORS? OE AOD area ee 16°17 
Length of tail to length of bodycat TOURS los P20r ae, Sis SL Sass 
Length of pectoral limb to length of body at 100 ........ 29°82 
Length of pelvic limb to length of body at 100 .......... 39°08 
Myo.oey. 
On removing the skin of my specimen I do not find the fat 
which, according to Drs. Schmidt, Goddard, and Van der Hoeven *, 
exists in the hollows at the roots of the limbs in Cryptobranchus. 
Neither have I found any conspicuous cutaneous muscle or the 
contrast in colour which those authors have described as existing in 
the last-named genus between some and others of the muscles, but all 
are moderately pale in my specimen. 
The general muscular investment of the body is, in the tail, di- 
visible into an antero-posterior series of segments corresponding to 
the division of the vertebral column into vertebree. In the trunk 
this divisibility is very obscurely indicated, least so towards the mid- 
dle of the abdomen, where there are transverse tendinous inter- 
sections. 
The muscular envelope consists of four longitudinal portions sepa- 
rated by four more or Jess marked linear divisions. 
The first of these divisions extends backwards from the mid-cranial 
region to the end of the dorsum of the tail. It is deepest by far in 
the caudal region of the body, where it is filled up by a very large 
accumulation of fat. A fibrous membrane extends down from the 
bottom of this dorsal furrow to the spines and neural arches of the 
vertebree, and forms a partition between the dorsal muscular mass of 
one side and that of the other side. 
The second antero-posterior linear division extends similarly along 
the ventral surface of the body from the thoracic region backwards. 
It is only a deep furrow, however, behind the cloacal aperture ; in 
* Aanteekeningen over de Anatomie van den Cryptobranchus japonicus door 
Dr. F. J. J. Schmidt, Dr. Q. J. Goddard, en Dr. J. Van der Hoeven. Natuur- 
kundige Verhandelingen van de Hollandsche Ma aatschappij der Wetenschappen 
te Haarlem. Tweede Verzameling, Negentiende Deel, Eerste stuk, 1862. 
