GALEORHINUS PUNCTULATUS. 173 



about twice the length of the orbit; hindmost opening above the pectoral. 

 Pectorals short and broad, applied to the side not reaching to the middle of the 

 base of the dorsal, width about seven eighths of the length, length of bases less 

 than half the width of the fins; angles broad, rounded; hind margin almost 

 straight. Dorsal origin a short distance behind the ends of the bases of the 

 pectorals, base very long, about two thirds of its distance from the second dorsal, 

 height of fin three fifths of the length of the base, upper angle blunt, hinder 

 acuminate. Second dorsal not more than half as large as the first, similar in 

 form, base equal to its distance from the caudal, end of base above the middle 

 of the anal base. Base of anal half as long as that of the dorsal above it, distant 

 its length from that of the caudal, nearly half of it extended behind the end of the 

 base of the second dorsal. Caudal little more than one fifth of the total length, 

 rather narrow; subcaudal with a notch behind it and with a very feeble lobe in 

 front. 



Back brown with narrow transverse bands of darker, separated by spaces 

 of about equal width: one or a pair crossing the orbits, one across the spiracles, 

 one on the nape, four between the nape and the dorsal, four or five on the base 

 of the dorsal, six between the dorsals, three on the base of the second dorsal, and 

 two or three between it and the caudal. A yellow spot in front of each eye abo\'e 

 each orbit. Fins dark with narrow edgings lighter. Lower surfaces whitish. 

 On a larger individual pairs of bands are more or less confluent and all are more 

 indefinite, indicating a probable loss of the bands later in life. 



Total length 20, snout to abdominal pores 10|, snout to fifth gill opening 

 4|, snout to mouth if, and caudal 4| inches. Total length 25, snout to pores 

 12?, snout to fifth gill opening 5|, snout to mouth 2g, caudal 5f. 



Types from Rio Grande do Sul, Brazil, collected by the Thayer Expedition. 



GaLEORHINUS PUNCTULATUS. 



Mustelus punctulatus Risso, 1826, Hist, nat., 3, Poissons, p. 128; Muller & Henle, 1841, PUigios., 

 p. 190; MoREAU, 1881, Poiss. France, 1, p. 316. 



Form slender and elongate; head narrow, depressed; snout long, tapering, 

 blunted at the end. Nostrils in the posterior third of the preoral length, anterior 

 valve produced in a rounded lobe. Eye small, pupil horizontal, orbit two and 

 two thirds times in the length of the snout. Mouth small, width equal two thirds 

 of the length of the snout, or twice the length; labial folds short, less than half 

 the length of the jaws, upper little longer. Teeth intermediate between those 

 of G. laevis and those of G. mustelus: they are smooth but the cusps are rather 



