1 34 PROCEEDINGS : BOSTON SOCIETY NATURAL" HISTORY. 
sides of head and trunk, and back posteriorly, lines break up into 
blotches or become vermiculations. Dorsal, anal, and caudal pale 
brown, caudal darker to dusky terminally. Iris pale yellowish. 
Teeth pale. 
Length 3f inches. 
One from Newport (Powell). This species has long been merged 
with S. testudmcus (Linne) but is undoubtedly distinct. S. geometricus 
differs markedly in the wider convex bony interorbital, 3 or less in the 
head, whereas in S. testudinciis it is 4 or more. Though the eye appears 
usually smaller in S. geometricus, it is variable. The color pattern is 
different in »S. geometricus, and is marked with more lengthwise 
ellipsoid designs, and more transverse bands on top of head. I have 
Fig. 8. — Spheroides trichocephalus (Cope). 
seen but two examples, the one described above, and another from 
Panama. The Mexican material mentioned by Cope appears to be 
true S. testudineus. 
Spheroides trichocephalus (Cope). Fig. 8. 
Tetraodon trichocephalus Cope, Proc. Acad. Nat. Sci. Phila., 1870, 
p. 120. Newport, Rhode Island. 
Head 2|-; depth (contracted) about 2|; D. ii, 6; A. ii, 5; head 
width 1^ its length; snout 2^; eye 4; interorbital 3. 
Body compressed, elongate, belly loose and flabby, apparently 
capable of great inflation. Caudal peduncle compressed. Head 
large, robust, compressed, front profile rather steep. Snout convex, 
slightly longer than wide. Eye large, rounded, high, center slightly 
