92 THE PLAGIOSTOMIA. 



Pristiurus melastomus. 



Haae gjale Strom, 1762, Sondm., 1, 283. 



Squalus catulus Gunner, 1766, Trondj. sels. selskr., 2, p. 249. 



Rod haae Ascaniua, 1777, Icon., 4, p. 5, pi. 38. 



Galeus melastomus Rafinesque, 1810, Caratteri, p. 13. 



Scyllium catulus 9 Risso, 1810, Ichth. Nice, p. 30. 



Scyllium arledi Risso, 1820, Journ. phys. chein. et hist, iiat., 91, p. 241; 1826, Hist. iiat. 3, Poissona, 



p. 117. 

 Squalus prionurus Otto, 1821, Conspectus, p. 5. 

 Scylliorhinus delarochianus Blainv., 1830, Poiss. Fr., p. 74. 

 Scylliorhmus melastomus Blainv., 1830, ibid., p. 75. 

 Squalus atinulatus Nilsson, 1832, Prodromus, p. 114. 

 Scyllium 7nelanostomu7n J enyns, 1835, Man., p. 497; Bonaparte, 1841, Icon. Fauna Ital., Pesci; Kr5yer, 



Danm. fiske, 3, p. 832, fig. 

 Black-mouthed dog-fish Yarrell, 1836, Brit, fishes, p. 375, fig.; Couch, 1867, Brit, fishes, 1, p. 18, pi. 3. 

 Pristidurus melanostomus Bonaparte, 1839, M^m. Soc. sci. Neuch., 2, p. 11; Gray, 1851, Chondrop- 



terygii, p. 32. 

 Pristidurus melanostomus Mijller & Henle, 1841, Plagios., p. 15, pi. 7; Lowe, 1860, Fishes Madeira, 



pi. 77, f. 22-23; Dumeril, 1865, Elasm., p. 325; GtJNTii., 1870, Cat. fishes Brit, mus., 8, p. 407; 



Gerv. & BouL., 1877, Poiss. Fr., 3, pi. 77, f. 22-23; Malm, 1877, Goteb. och Bohus. fauna, p. 623; 



GiGL, 1880, Elenc, no. 525; Morbau, 1881, Poiss. France, 1, p. 284, f. 34; Doderlein, 1881, Man. 



ittiol. Medit., 2, p. 28; Day, 1884, Brit, fishes, 2, p. 314, pi. 160, f. 1; Jensen, 1907, Dan. fiske, p. 



306, pi. 27, f. 2; Regan, 1908, Ann. & mag. nat. hist., ser. 8, 1, p. 463. 

 Scyllium annulalmn Nilsson, 1855, Fisk. Skand., 4, p. 713. 

 Pristiurus artedi Bocage & Capello, 1866, Plagios., p. 11. 

 Pristiurus atlanticus Vaillant, 1888, Travailleur et Talisman, Poissons, p. 59, i)l. 1, f. 1. 



Body shorter than the tail; head more than one sixth of the total length, 

 broad, depressed; snout long, broad and broadly rounded across the end, with 

 numerous pores. Nostrils large, without nasoral grooves, less than one third 

 of the distance from the mouth to the tip of the snout; anterior valves very short, 

 angled outward, widely separated across the internarial space, about equidistant 

 from the mouth and from one another; posterior valves rudimentary. Mouth 

 large, width nearly equal to the length of the snout, or equal to twice the oral 

 length; labial folds short, less than one third of the length of the jaw, around 

 the angle. Teeth small, in If rows in the specimen in hand; symphyseal 

 teeth very small, erect, with a lateral smaller cusp at each side; lateral teeth 

 with two small cusps on the inner side of the larger median cusp and one or 

 more on the outer side. Eye large, hardly half as long as the snout. Spiracle 

 small, close behind the eye. Gill openings narrow, hindmost above the pectoral. 

 Pectorals large, muscles of the bases closely bound with those of the body, fin 

 long, broad, subtruncate on the hind margin, broadly rounded on the inner 

 angle. Dorsals small, subequal; origin of the first dorsal above the hindmost 

 fourth of the bases of the ventrals; origin of the second above the hinder half 

 or two fifths of the base of the anal, and end of base opposite to that of the anal 



