BULLETIN OK THE UNITED STATES KISH COMMISSION. 
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Ostracion triangulatus lenibis figurararum lyexagonarum eminentibus, etc., Artedi, Genera, 56, 1738, Jamaica; seen by Artedi 
in the collection of Sir Hans Sloane and in the Naggs Head Inn, London. 
Ostracion Irigonus Linnaeus, Syst. Nat., ed. X, 330, 1758, India; after Artedi. 
Ostracion yalei Storer, Bost. Journ. Nat. Hist., I, 1837,353, Holmes Hole, on Marthas Vineyard. 
Lactophrys oviceps Kaup, Archiv Naturg. 1855, 218; specimens with 10 dorsal rays, Linnaeus having given by error 
“ D. 14” in the original description of 0. Irigonus. 
Ostracion undulatas Poey, Synopsis, 441, 1868, Havana. 
Ostracion expansion Cope, Trans. Am. Phil. Soc. 1870, 474, figs. 9-10, St. Martins, West Indies. 
Lactophrys irigonus, Poey, Fauna Puerto-Riquena, 347, 1881; Stahl, 1. c., 81 and 167, 1883; Jordan & Evermann, l.c., 
1728, 1898. 
221. Lactoplirys bicaudalis (Linnaeus). “Cliapin”; Spoiled Trunk-fish. 
(Plate 40.) 
Head 3.5; height of side 2.25; greatest ventral width 2.7; width between bases of ventral spines 
3.6; eye 3; snout 1.3; interorbital 2.1 ; least, depth of caudal peduncle 3.4; its width in its depth 3.2; 
I). 10, base of tin 4 in head, the height 2; A. 10, its base and height equal to dorsal; P. 12, 1.8 in 
head. Body sharply 3-angled, sides and ventral surface posteriorly somewhat concave; dorsal earina 
sharp, considerably arched, ending in front over middle of eye; supraocular ridges strong, a slight 
ridge from supraocular ridge along side to caudal peduncle; no spines on head; a sharp, stiff spine, 3.4 
in head, on each side at posterior angle of ventral surface; carapace closed behind dorsal and anal tins, 
its width behind dorsal about twice that of strip behind anal; caudal peduncle about 1.4 to 1.6 in head; 
branchial aperture oblique, short, about 3.6 in head; body and head everywhere rough, tubereulate, 
tubercles strongest on body; hexagonal plates best defined on ventral surface. 
Ground-color, light-yellowish, changing to whitish below; everywhere on head, body, caudal 
peduncle, and caudal covered with small round black spots, largest on middle of side, where they are 
somewhat smaller than pupil, those on the caudal peduncle small, larger on caudal tin, arranged in 5 
to 7 irregular vertical bars; tip of snout rose, with a few small black spots above fleshy base of dorsal; 
pectoral with several black spots, few or none upon anal; pupil black, with orange border. In spirits 
3 to 5 irregular white blotches in center of hexagonal plates on low ridge behind eye. 
An inhabitant of the West Indies, generally common from Cuba to Ascension Island; not known 
from Florida; recorded by Jordan & Rutter from Jamaica; next to L. Irigonus the least common 
species of the genus about Porto Rico, specimens having been obtained only at Ensenada del Boqueron, 
Ponce, and Arroyo. It reaches a length of a foot or more. 
Ostracion triangulatus tuberculis he.mgonis radialis , etc., Artedi, Genera, 57, 1738, India. 
Ostracion bicaudalis Linnaeus, Syst. Nat., X.. 330, 1758, India. 
Lactophrys bicaudalis. Jordan & Evermann, 1. c.., 1723, 1898. 
222. Lactophrys tricornis (Linnaeus). Toro; Cow-fish. 
Head 4.25; height of side 2.5; greatest ventral width 4.8; width between ventral spines 8.3; eye 
2.7; snout L25; interorbital 2; I>. 10, base equal to eye, height nearly equal to head; anal base 1.25 
in eye, height 2 in head; caudal long, equal to distance from tip of snout to posterior edge of pectoral 
base; pectoral 1.2 in head; caudal peduncle long and slender, length a little exceeding that of head, 
least depth 2.75 in its length, least width about 3 in its least depth. Body 3-angled; dorsal earina 
gently arched, beginning over posterior part of pupil; ventral angles not flaring nor wide apart, each 
ending posteriorly in a stout spine; supraoccipital ridge moderate, with a stout spine in front; middle 
of side with a broad low ridge from eye to caudal peduncle; snout projecting, outline from snout to 
occipital spines concave below, then rising abruptly; interorbital very convex; giil-opening oblique, 
short, scarcely equal to eye; carapace closed behind dorsal and anal tins, the width of part behind 
dorsal about four times that behind anal, plate behind dorsal sometimes ending in a short spine, 
directed upward; hexagonal plates with small, blunt tubercles. Occasional specimens have a real 
spine on supracaudal plate, as figured by Lister. Of nine Porto Rican specimens examined by us two 
have this spine. 
Color, brown, yellow, blue, or green, with irregular blue blotches, centers of scutes often lighter 
than margins. Young light gray, tinged with olive; belly white; head and carapace with round spots 
of light-blue, these sometimes forming more or less interrupted longitudinal stripes; about four of these 
