630 PROCEEDINGS OF THE NATIONAL MUSEUM. 



first gill-opening; mouth very broad, slightly curved, a deep labial' 

 fold at each corner; lips thin; teeth moderate, forming a cutting edge i 

 in each jaw; nostrils rather large, inferior, while nearer eye than tip 

 of snout they are nearer the latter than mouth; interorbital space is 

 l)road, very elevated, flattened more or less like upper surface of head. :i 

 The spiracles large, directly behind eye. Gill-openings in front of 

 base of pectoral. 



Body everywhere finely roughened. 



Origin of first dorsal spine a trifle nearer tip of snout than that of 

 second dorsal; first dorsal spine is three-fifths height of fin; spine of 

 second dorsal three-fourths height of fin; pectorals large, smaller thani 

 head, reach l)eyond base of first dorsal, emarginate behind; ventrals 

 nearer second dorsal than first; caudal broad, lower lobe rather long. . 

 Caudal peduncle rather long, with a pit at base above. Lateral linei 

 indistinct along side. j 



Color in alcohol gray above, white beneath; upper surface of pec- 

 torals and ventrals grayish. 



Length 28^ inches. 



Fig. 3.— Squalus mitsukueii. - ' 



Type No. 7184, Ichthvological Collections, Leland Stanford Junior 

 Universit}^ Museum. Locality, Misaki. 



Coasts of Japan, generally common from Hokkaido as far south-l 

 ward as Formosa. Numerous large adults taken at Misaki, one of 

 them the type, a female. Several embryos were also obtained, part 

 of them from this specimen. A young example was also ol)tained 

 from near Aomori in Tsugaru Straits, and another one, probably of 

 the same species, from Formosa. Specimens are in the Imperial Mu- 

 seum from Kagoshima, and Boshu in Awa near Misaki. These arc 

 recorded by Ishikawa" as AcantJiias vulgaris and A. uyatus, but the 

 two specimens are alike. 



(Named for Prof. Kakichi Mitsukuri, who was present with Messrs. 

 Jordan and Snyder at Misaki, when the type was taken.) 



24. LEPIDORHINUS Bonaparte. 



ieptdor/iinus Bonaparte, Selach. Tab. Analyt., 1836, p. 9 {srjuamosus) . 

 Srymnodon Boc AGE and Capello, Proc. Zool. Soc. Lond., 1864, p. 263 (ringnis). 

 Machephihts Jouiiso's, Proc. Zool. Soc. Lend., 1867, p. 713 {dumerili). 



This genus is close to Centrophorus^ differing in the form of the 

 scales, which are leaf-shaped and pedunculate, with a strong raediai 



«Prel. Cat., p. 61. 



