58 REPORT OF NEW JERSEY STATE MUSEUM. 
ity and at angle of mouth, both of which are smaller by % 
than those which occupy intermediate space and have but 
a single point to each, which in the greatest number is flattened 
and truncated. At angle of mouth 4 or 5 last rows flat- 
tened, subtriangular, and reclining upon each other. Interme- 
diate teeth larger, subtriangular, one or two grooves on external 
face indicating union of points of which they appear composed. 
Of these points two are united, other often detached, very distinct 
and presenting a bifid appearance. Some teeth exhibit 3 points 
but rarely. Mandibular teeth rather larger than upper. Towards 
anterior extremity near angle of jaw a little elongated and lan- 
ceolate, and less conic but somewhat more compressed. Anterior 
extremity sensibly emarginate. These teeth not implanted deeply 
in skin, disposed in 7 or 8 distinct rows in middle, and 
younger ones on inner row. Nostrils placed before eyes beneath 
rostrum. Branchial apertures 5 on each side, anterior largest, 
extending from neck above to under part of chest, where they, 
appear confluent with those of opposite side. Posterior gill- 
openings smallest. Spiracle very small, placed above and a little 
behind angle of jaw, and each corresponding with a long interior 
opening in mouth between upper jaw and first branchial opening. 
Skin rough to touch, particularly on passing hand forward, as it 
is covered with numerous small horny somewhat curved points. 
These small points assembled in groups to form numerous undu- 
lated abbreviated bands, united at their extremities and again 
dividing. Their breadth, on middle of body about two lines, and 
giving whole surface appearance of being wrinkled. These bands 
or wrinkles transverse on whole body from gill-openings to pos- 
terior end of caudal carina, where they disappear. On head, 
throat and behind spiracle they are longitudinal, upon branchial 
lamina and above pectoral they become oblique, and on latter 
their direction complies with movement of articulation of fins. 
All fins destitute of wrinkles. First dorsal triangular, a little 
emarginated, extended to a point, detached posteriorly and placed 
equidistant. Second dorsal very small, subtriangular, with pos- 
terior lobe detached at tip, and placed before anal. Anal sub- 
triangular, with detached pointed lobe behind. Caudal large, 
straight, elevated, falciform. Lower lobe short and wide. Pec- 
