Jordan and Everniaiin. — Fishes of N'orth America. 23 



under end of dorsal; its base equal to k 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.). 20i 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 <.f Bean), (profundorum, of the 

 depths.) 



Scylliorhimis prnfumlorum, Goode & Bean, Oceanic Ichthyology, 17,1894, Gulf Stream. 



15. CATULUS, Smith. 



Catuhif, Anprew Smith, Proc. Zool. Soc. liond., 18:i7, S.'i, {ulellarin). 

 Porodermn, Smith, I. c, {africamo^}. 



Halidurm, Gill, Ann. Lye. Nat. Hist. N. Y., 18G1, 407, {hlirgen). 

 CephaloscytUum, Gill, 1. c, {laticeps). 



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

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

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

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

 and CepJialoscylUum, 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. Catnlus differs from Prisiiurus 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 Caiulus than in Scylliorhinns or Pristhinis. Species numer- 

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

 catus, cat.) 



I. Catulus: Head not very bro.ad; belly not capable of great inflation. 



o. B<.dy plain brown, or marbled with whitish without lilack epota or markings; lielly dusky. 

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

 (obsolete in the young). 



c. Snout from mouth forward y^ '"■'dth of mouth; anal much longer than second 



<lorsal; bolly pale. xaniurus, 2;i. 



hb. Upper margin of tail without enlarged scales; belly not pale. 



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



nuuNNEUS, 24. 

 d(l. Snout, from mouth, scarcely J/^ width of mouth; anal scarcely larger than second 

 dorsal. cepiialus, 25. 



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

 back. 

 c. 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. UETIFEH, 2G. 



II. CethaloSoyllium, (/C€<J)aA7), head; Scyllinm, a-KvWi.oi'). Head very broad and depressed 



Stomach cap.able of great iiillation. 

 /. Back with liroad black crossbars; upper part with largo round black spots. uter, 27. 



* ScylUorhims, Blainville, IS\G = Scyllinm, Cuvier, 1829, typo Sq. canicula, Liuua.ni8. 



