!94 
MEMOIRS OF TEE QVEENSLANB MUSEUM. 
SWALLOWTAIL. 
Dart (New South Wales). 
(Plate XXYIII.) 
Type localities: — Yizagapataui, B.I. (S. hotla). 
Yizagapatam, B.I. (T. 7'iisselii). 
Java (T. ohlongns), 
Percy Islands, M.Q. (T. coppingeri) , 
]\roreton Bay, S.Q. {T. vclox). 
Body deeply siihovate and strongly (*onipressed, the dorsal and ventral 
■contours symmetrical or nearly so, the former linear or gently rounded and 
moderately acclivous from the frontal region to the soft dorsal, the latter feebly 
convex from the chin to the ventrals, between whieli and the anal it is linear or 
slightly emarginate; width of body 8 to 3-25 in its depth, which is 2*3 to 2-7 in 
its length and from one third to five ninths more than the length of the head; 
abdominal region moderate, 14 to PG7 in the length of the anal; caudal peduncle 
one third to one half longer than deep, its least depth one tenth less to two 
ninths more than the eye-diameter. Head rather small, its length 345 to 4 in 
that of the body, its width 1*75 to 2 in its depth, which is 1-3 to 14 in its length; 
cranio-nuchal keel well develojx^d. Snout short, pointed in the young, becoming 
blunter with age, the upper protile rounded, its length from one sixth less to as 
long as the eye-diameter, which is 3*2 to 3-85 in the length of the head-; adipose 
lid little developed; interorbital region elevated and sharply rounded, its width 
as much as to one eighth more than the eye-diameter. Jaws equal in the adult, 
the upper the longer in the young; maxillary extending to below the middle or 
anterior boixler of the pupil, its length 245 to 2-85 in that of the head, the Avidth 
of its truncate distal extremity from one fifth more than to twice its distance from 
the eye and 2*8 to 3-6 in the eye-diameter. Preopercle Avith broadly rounded 
angle, the membranous border erenulate in the young, entire in the adult, the 
hinder limb inclining slightly forwards. 
Both juAvs Avith a nai’roAV' band of rather coarse villiform teeth, the outer 
roAA^ slightly enlarged; A'omer A\dth a triangular patch, palatines with a narroAV 
band of similar teeth ; pteiygoids and tongue toothless. 
Scales small and rounded on the trunk, becoming gradually larger and 
more ovate posteriorly; cheeks and postorbital region scaly; rest of head and 
nuchal ridge naked. Lateral line AAuth a feeble curve anteriorly, thence straight 
or gently sinuous to the caudal &i, the pores 88 to 95. 
Dorsal fin AA'ith vi, i 23 to 26 rays ; procumbent spine, strong and exposed ; 
spines short and separate except in the very young, graduated evenly from the 
front, the last 14 to 2 in the eye-diameter. Soft dorsal originating from one 
fifth to a little nearer to the root of the caudal than to the tip of the snout, the 
