266 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
the eggs are laid. It is the type from which Figures 3 and 4 of Plate XIX. in 
the Proceedings of the U. S. National Museum for 1894, and Figures 39 and 40 
of the Oceanic Ichthyology were drawn. Apparently it has lost the tip of the 
snout and the caudal filament. The lower fin of the tail is rather indistinct 
anteriorly, but evidently it originates some distance farther forward than the 
upper. Probably the specimen was torn from the egg and mutilated in the 
dredge. The claspers and the tenacula are undeveloped. The parietal spines 
and those between the dorsals and between the second dorsal and the fin on 
the tail are quite prominent. ‘They rise above the level of the head and of 
the dorsal fins and the dorsal spine, as these last are closely applied to the 
back ; their function appears to be aid in escape from the eggshell and to pro- 
tect the back and fins at the time and later. The teeth of this individual are 
figured on Plate 5, Figures 8 and 9, in four times natural length. They exhibit 
slight differences in outline from those of older specimens, the principal one of 
which is a backward extension from the median ridges of palatines and man- 
dibulars; a marked distinction also occurs in the apparent lack of tritors. On 
each of both palatines and mandibulars there is a symphyseal, a median, and an 
outer ridge extending to the hind edge of the tooth. Close examination dis- 
closes, even in this comparatively undeveloped stage, indications of the molar- 
like tritors in these ridges, in positions similar to those shown in Figures 6 
and 7 of Plate 5. In each case the inner ridge is formed by the incurved edge 
of the tooth. The vomerine teeth are less hooked than those on the older 
specimens, and the tritors are hardly visible. 
Callorhynchus milii. 
Plate 6, Figures 7, 8; Plate 15, Figures 4, 5. 
Callorhynchus milit Bory, 1825, Dict. class. d’Hist. Nat., III., 62, pl. v. 
Callorhynchus tasmanius Rich., 1841, Trans. Zool. Soc. Lond., II. 174. 
A specimen belonging to this species, sent by Mr. W. Robertson from 
Hobart Town, has a total length of 1¢.5, a length-of head of 4, a length from 
snout to dorsal spine or to base of pectoral of 4.25, from snout to ventral of 
7.4 and to second dorsal of 7.75, a depth of body of 2.5, a length of dorsal 
spine of 2.75, a length of pectoral of 4, a length of base of second dorsal of 3, 
a distance from origin of supracaudal to end of base of anal of 0.6, and a 
length of caudal of 4.75 inches. 
The form is compressed, and is massive about the head; seen from the side 
the outline is very convex and prominent above the front edge of the eye and 
forward for a short distance. The foliate extremity of the proboscis is broad- 
est near the hind margin, where it is subtruncate and slightly notched. The 
dorsal spine is situated above the origin of the pectoral; it is compressed and 
sharp in front. In atrans-section it is concave immediately behind the sharp 
front edge, then becomes convex ; the posterior edges have sharp retrorse ser- 
