132 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
high, circular, its center near last f in head. Mouth small, terminal, 
jaws about even. Teeth large, strong, about 8 in each jaw, the 
cutting edges of each with deep notch. Lips thin, rather broad. 
Nostrils close together near front of eye and level with its center. 
Interorbital convex. Gill-opening nearly vertical, very slightly less 
than eye-diameter. Scales rough, narrow, in oblique rows and slightly 
enlarged above ventral spine, very small on caudal peduncle. Lateral 
line complete. Spinous dorsal opposite hind eye edge, first spine 
largest, roughened, stout, and third spine falls well short of soft dorsal. 
Latter inserted midwaj' between front of eye and caudal base, front 
rays slightly higher. Anal inserted slightly behind soft dorsal origin, 
similar. Caudal rounded slightly behind. Pectoral rounded, 1| in 
snout. Ventral spine roughened, movable, sides spinescent. Ventral 
flap with about 8 pairs of spines. 
Color in alcohol largely uniform dull brownish, slightly paler below. 
Body and fins with obscure short, more or less horizontal streal^ and 
spots, numerous and most distinct on head, back, and sides above, not 
present on lower side of head and abdomen. Soft dorsal, anal, and 
caudal also spotted and streaked obscurely with paler. Brown blotch 
about size of eye at origin of soft dorsal, reflected on fin, also three 
other paler and smaller blotches, last on caudal peduncle above, and 
two reflected slightly on dorsal. Iris whitish. 
Length 3xV inches. 
No. 804, A. N. S. P., type of Balistes powellii Cope. Newport, 
Rhode Island. September, 1867. Samuel Powell. 
This is the only example ever secured in New England waters. 
Balistes vetula Linne. — Nantucket. 
MONACANTHIDAE. 
Stephanolepis hispidus (Linne). — Katama Bay. 
Tetraodontidae. 
Lagocephalus laevigatas (Linne). — Nantucket. 
Spheroides spengleri (Bloch). — Katama Bay. 
Spheroides geometricus (Schneider). Fig. 7. 
Tetraodon geoindricxis Cope, Proc. Acad. Nat. Sci. Phila., 1870, 
p. 120. Newport, Rhode Island. 
