in table 5. Teeth in 22 + 22/16 + 2+ 16 rows, about 

 half with three cusps and half with five cusps. 

 Color of dorsolateral surfaces light brown with- 

 out lighter colored spots or markings; pattern of 

 seven dorsal saddles plus several more or less dis- 

 tinct intermediate saddles edged with broken lines 

 of darker color, saddles at the first dorsal and sec- 

 ond dorsal fins more intense and extending across 

 the fins, caudal fin strongly marked, paired fins 

 and anal fin only faintly marked. 



Figure 18. — Schroederichthys tenuis new 

 species, ventral side of head of the type. 

 USNM 188052. 



Notes. — The collection of only two specimens of 

 this species nearly 2,000 miles from the area from 

 which S. macidatus is known illustrates the incom- 

 pleteness of the sampling of the fauna from con- 

 tinental slopes. 



Genus Galeus Rafinesque, 1810 



Type species — Galeus melastomus Rafinesque, desig- 

 nated by Fowler, 1908. 



Galeus is a genus with about eight nominal 

 species, one of which, Galeus melastomus Rafin- 

 esque, of the eastern North Atlantic region, is well 

 known. Members of the genus are characterized 

 by the presence of a spiny crest of enlarged den- 

 ticles on the upper margin of the caudal fin (fig. 

 21) and a comparatively long snout. An Aus- 

 tralian scyliorhinid with enlarged denticles form- 

 ing crests along both the upper margin of the 

 upper caudal lobe and the anterior margin of the 

 lower caudal lobe has been split off from Galeus 



Figure 19. — Partially formed egg ease of Schroederich- 

 thys maculatus taken from an oviduct of a 342-mm. 

 female collected at M/V Oregon station 1870, August 21, 

 1957. The egg case was 44 mm. long by 14 mm. in 

 greatest width, and the posterior tendrils (broken off 

 in drawing) were 225 mm. long. The anterior end of 

 the egg case was still within the nidamental gland 

 area when taken, and anterior tendrils had not formed. 

 The egg case wall was rather thick, opaque, olive 

 colored, and striated longitudinally. 



under the name Figaro boardmani (Whitley). A 

 group of two Pacific scyliorhinid species, Parma- 

 turus xaniurus (Gilbert) and P. pilosus Garman, 

 have crests with specialized denticles along the 

 upper margin of the caudal fin, but these crests ex- 

 tend somewhat onto the lateral surface of the up- 

 per caudal lobe, and the marginal scales, although 

 enlarged, do not project outward from the tail to 

 the degree characteristic of these, scales in Galeus. 

 Also, these sharks, Parmaturus, have compara- 

 tively short snouts and broad heads, much different 

 in general shape from members of the genus Gal- 

 eus. One other cat shark, Apristurus profund- 

 orum (Goode and Bean), also has denticles on the 

 upper margin of the dorsal fin differing in size 

 and shape as well as in spacing from denticles on 

 the lateral surfaces of the tail and most other parts 

 of the body (see fig. 23). The crest is less well 

 defined in Parmaturus than in Galeus, and in 

 Apristurus profundorum there are no enlarged 

 and projecting denticles marking the margin of a 

 crest. 



The presence of an upper caudal crest with 



REVIEW OF WESTERN ATLANTIC CAT SHARKS 



607 



