EMERSON: ANATOMY OF TYPHLOMOLGE. 
45 
bones and muscles, and the body of the larger one was studied for 
the viscera and to some extent for the vertebrae, while the head of 
this specimen was used for serial cross sections. 
The following table gives measurements of the two specimens and 
of the specimen described by Stejneger: — 
Total length 
Specimen 1. 
86 mm. 
Snout to anus 
48 
Snout to gular fold 
13 “ 
Width of head 
10.5 “ 
Length of fore limb 
18 
Length of hind limb 
18 “ 
Specimen 2. 
Stejneger’s specimen 
81 mm. 
102 mm. 
45.5 “ 
53 “ 
— 
16 “ 
9.5 “ 
13 “ 
16.5 “ 
20 “ 
15.5 “ 
20 “ 
I wish to take this opportunity to express my gratitude to Dr. H. 
H. Wilder, under whose direction this work has been done, for 
his constant advice and helpful criticism. My thanks are also due 
to the Hon. George M. Bowers, of the United States fish com¬ 
mission, through whose courtesy Dr. Wilder obtained the two speci¬ 
mens I had for study. 
Axial Skeleton. 
The Skull. 
The skull of Typhlomolge is in shape an elongated hexagon, with 
the longitudinal axis about twice as long as the transverse. The 
anterior side of this figure is formed by the premaxillary, the antero¬ 
lateral sides by the ligaments between the premaxillary and the 
quadrates, the postero-lateral sides by the paraquadrates and peri- 
otics, and the posterior side by the periotics and occipitals. 
From a dorsal aspect the chondrocranium is not visible with the 
exception of the ante-orbital processes, the trabeculo-quadrate isth¬ 
mus, and the supra-occipital arch. The conspicuous bones which 
cover it are the premaxillary, the frontals and parietals, and the 
periotics. The paraquadrates are also prominent features. All 
these bones are thin and quite transparent, so that the brain and 
many of the cranial nerves show through, but this transparency 
renders it hard to make out the extent of the individual bones. 
