94 THE PLAGIOSTOMIA. 



of the forward portion of the base of the first dorsal above the bases of the ven- 

 trals; end of the base behind the bases of the latter. Basal length of the second 

 dorsal less than half of that of the anal and more than the forward half of it 

 above the base of that fin. Caudal nearly one third of the total length. 



Greyish brown, ends of dorsals, anal, and caudal darker. 



Northwest of the Hebrides, in depths ranging from about 600-875 fathoms 

 (1100-1300 m.). 



Pristiurus sauteri. 



Pristiurua sauteri Jordan & Richardson, 1910, Mem. Carnegie mus., 4, p. 160, pi. 63, fig. 1. 



More robust than P. eastmani. Head to first gill opening one fourth of 

 the total length; snout four elevenths of the head. Internarial space equal 

 width of nostril. Width of mouth little more than preoral length of snout. 

 Teeth with a long median cusp, at each side of which is a lateral cusp half as 

 long, which latter may or may not have one or two rudiments at its base. Spira- 

 cle small, one diameter behind the corner of the eye. Scales minute, with a 

 median keel and cusp, larger in a couple of rows separated by four rows of 

 smaller ones extending from the root of the caudal on a sort of keel along the 

 upper edge of the fin. About half of the base of the first dorsal is above the 

 hinder ends of the ventral bases. Second dorsal little smaller than the first, 

 -origin little behind the middle of the anal base. Interdorsal space more than 

 twice the base of the first dorsal. Anal base more than twice that of the second 

 dorsal; tip of fin not reaching a vertical from the end of that dorsal. Tip of 

 caudal elongate, narrow; subcaudal lobe feeble, not produced. 



Back brown; lighter below. Dorsals black anteriorly; white in hinder 

 portions. Supracaudal blackish at the end; subcaudal lobe tipped with dark. 

 Pectorals dark anteriorly, white backward and on margins. 



Takao, Formosa. 



Pristiurus spongiceps. 



Catulus spongiceps Gilbert, 1905, Bull. U. S. fish, comm., 23, p. 579. 

 Scyliorhinus spongiceps Regan, 1908, Ann. & mag. nat. hist., ser. 8, 1, p. 459. 



Body compressed, head depressed, snout soft, spongy, porous. Nasal 

 valves widely separated, without cirri, terminating in thickened rounded lobes. 

 Spiracles near the eye. Mouth wide, width greater than the length of the snout, 

 with labial folds, lower fold extending half way to the symphysis, upper three 

 fourths as long. Teeth five cusped (3-5), in 36 rows in the upper series. Dorsal 

 fins equal, separated by one and one half times the length of the bases, that is, 



