G95 



mouth on the upper jaw and a shorter fold from the corner of the 

 mouth on the lower jaw (fig. 2). 



The teeth are very minute and numerous. They are nearly equal 

 in size and shape. Each tooth is acutely pointed, laterally compressed 

 and with an ellipsoidal root. The band of teeth on the upper jaw is 

 curved a little and at each and of the band there is a detatched group 

 of teeth. The band on the lower jaw is crescent shaped. In each band 

 the teeth are arranged in a great many transverse rows, about 300 in 

 number. In the middle part of the band we count IG— 30 teeth in 

 one row. 



The gill openings are five in number and are very wide. The se- 

 cond pair is widest and measures 86 cm. The last pair is most narrow, 

 it opens above the base of the pectoral fins, where the body is very broad 

 and high. The pectoral fins are large and strong. The first dorsal fin 

 is inserted a little behind the middle of the body. The second dorsal 

 fin is very small. The ventral fins are inserted below the first dorsal. 

 The clasper is simple with a dorsal groove. The anal fin is very small. 

 It is just below the second dorsal. The caudal fin is large and lunate. 

 Its ventral lobe is well developed. 



The color is greyish brown with white round spots and transverse 

 bands, but the ventral side is colorless. The white round spots are 

 small and crowded near the anterior end of the body but become gra- 

 dually larger and fewer backwards. The caudal fin, the second dorsal 

 the ventrals and the anal are destitute of white markings. 



The stuffed animal now measures 800 cm in length and 365 cm 

 in circumference, behind the pectorals. Mr. Oseko tells me that the 

 skin has shrunk much and that the fish measured nearly 1000 cm 

 when fresh. He says, moreover, that the shark was covered with many 

 sucking fishes and one of these fishes and a pole made of oak (ca. 30 cm 

 long) were found in the stomach. 



Though the hitherto-known allied species [Rhinodon typicus Smith 

 and Micristodus punctatus Gill) are described insufficiently, I am in- 

 clined to believe that this fish is a new species of the Genus RJiiiwdon, 

 as it differs from these species in the form of teeth and the labial 

 fold. Hence I propose the name oi Rhinodon pentalineatiis for this 

 species. 



Tokyo, 22 July, 1901. 



