30. CENTKOPHORUS. 423 



6. Centrophorus ringens. 



Scymnodon ringens, Bocaye ^ Capcllo, Proc. Zool. Soc. 18G4, p. 263, 

 tig. 5, and I'eLv. Playiust. p. '6\, tab. 1. tig. 1. 



Labial gi'oove extending for some distance along the margins of 

 both jaws. Upper teeth very small and narrow, lanceolate ; the 

 lower more or less erect, triangular ; only the lateral are somewhat 

 inclined backwards. The distance between the nostrils is one-half 

 of the length of the prteoral portion of the snout. Lower angle of 

 the pectoral fin rounded, not produced. Dorsal spines feeble, but little 

 projecting beyond the skin. Anterior dorsal fin much shorter than 

 the second, the length of its base (without the spine) being about 

 one-fourth of its distance from the second dorsal. Extremity of the 

 ventral fins behind the end of the second dorsal. Scales peduuculate, 

 each with three strong ribs, each of which terminates in a point be- 

 hind. Uniform brownish black. 



Coasts of Portugal. 



a. Fine female specimen, 33 inches long. Presented by Prof. J. V, 

 B. du Bocage. 



7. Centrophorus calceus. 



Acanthidium calceus, Lowe, Proc. Zool. Soc. 1839, p. 92, and I'runs. 



Zool. Soc. iii. p. 19. 

 Centrophorus calceus, Lowe, Proc. Zool. Soc. 1843, p. 93. 

 crepidalbus, Bocage i^- Capcllo, Proc. Zool. Soc. 1804, p. 262, 



fig. 2, and Peix. Plcujiost. p. 28, tab. 2. fig. 1. 



The labial fold extends for some distance along the margin of the 

 jaws. Snout spatulate, much produced, the distance between the 

 nostrils being less than one-third of the length of the proeoral por- 

 tion of the snout. Lower angle of the pectoral fin rounded, not 

 produced. The length of the bases of the two dorsal fins (without 

 the spines) is nearly equal, and one-half of the distance between 

 them. Extremity of the ventral fins below the middle of the second 

 dorsal fin. The scales are small, tricuspid, and so minute as to give 

 a velvety appearance to the skin. 



Coast of Portugal ; Madeira. 



a. Female, 33 inches long. Portugal. Presented by J. V. B. du 

 Bocage. 



h, c. Females, 38 inches long. Madeira. Presented by J. Y. John- 

 son, Esq. 



3. Dorsal spines hidden beneath the skin : Centroscymnus. 



8. Centrophorus ccelolepis. 



Centroscymnus ccelolepis, Bocage Si- Capello, Proc. Zool. Soc. 1864, 

 p. 263, fig. 4, and Peix. Plagiost. p. 30, tab. 2. fig. 3 ; Wright, A?in. 

 Sf Mag. Nat. Hist. 1868, ii. p. 426. 



Labial groove prolonged forwards, but separated by a broad space 

 from that of the other side. Upper teeth very small, narrow, and 

 lanceolate. The distance between the nostrils is rather less than 



