Jordan and Evermann. Fishes of North America. 23 



under end of dorsal; its base equal to \ length of head to first gill 

 opening. Caudal continued in line of axis of body ; lower lobe rounded, 

 and in its greatest height not deeper than the height of the caudal ex- 

 tension of the body at the same point. Color, uniform grayish brown. 

 One specimen (85646, U. S. N. M.), 20| inches, obtained by the Fish 

 Commission steamer Albatross at a depth of 816 fathoms, in latitude 39 

 9' N., longitude 72 3' 15" W. (Goode $ Bean}, (profundorum, of the 

 depths.) 



Scylliorli inns prof undoritm, GOODE & BEAN, Oceanic Ichthyology, 17,1894, Gulf Stream. 



15. CATULUS, Smith. 



Catuhu, ANDREW SMITH, Proc. Zool. Soc. Lond., 1837, 85, (stellaris). 

 Poroderma, SMITH, 1. c., (africantis). 



Jl<iki-ltir>is t GILL, Ann. Lye. Nat. Hist. N. Y., 1861, 407, (burgeri). 

 Cephaloscyllitim, GILL, I. c., (latkeps). 



As here understood, this genus is very close to the European genus 

 Scylliorhinus,* from which it is distinguished by the separate nasal valves. 

 Gill has further divided the group into Catulus, having the nasal valves 

 provided with lobes or grooves, Halcelurus having the nasal valves simple, 

 and Cephaloscyllium, which has a very broad head and the stomach inflata- 

 ble. The latter group is perhaps generically distinct, but we lack the data 

 for properly defining it. Catulus differs from Pristiurus in having the 

 scales on the upper edge of the tail not much, if at all, enlarged and usually 

 not differentiated from the others. The prickles on the body are usually 

 much coarser in Catulus than in Scylliorhinus or Pristiurus. Species numer- 

 ous, usually in rather deep water. (Catulus, diminutive of low Latin 

 catus, cat.) 



T. CATULTJS: Head not very broad; belly nt capable of great inflation. 



a. Body plain brown, or marbled with whitish without black spots or markings; belly dusky, 

 b. Upper margin of tail with a broad band of enlarged closely appressed tricuspid scales 

 (obsolete in the young). 



c. Snout from mouth forward % width of mouth; anal much longer than second 



dorsal; belly pale. XANIUBUS, 28. 



&7>. Upper margin of tail without enlarged scales; belly not pale. 



d. Snout, from mouth, % width of mouth; anal 2% times base of second dorsal. 



BRUNNEUS, 24. 



dd. Snout, from mouth, scarcely ^ width of mouth; anal scarcely larger than second 



dorsal. CEPHALUS, 25. 



an. Body not plain brown ; spotted, or banded, or marbled with black; no enlarged scales on 



back. 



e. Back of tail covered with narrow black lines which form a net work of polygonal 

 meshes; belly yellowish; body moderately elongate, the stomach probably not in- 

 flatable. RETIFER, 26. 

 II. CEPIIALOSCYLLIUM, (Ke<f>aA>?, head; Scyllium, (ricv\\iov). Head very broad and depressed 



Stomach capable of great inflation. 

 /. Back with broad black crossbars; upper part with large round black spots. UTER, 27. 



* Scylliorhinus, Blainville, 1816 ScylUum, Cuvier, 1829, typo Sq. canicula, Linnaeus. 



