ADDENDA TO MARSIPOBRANCI1II, ELASMOBRANCIIII, ETC. 63 



tooth ill upper jaw. Two small teeth near together in front, simple and 

 pointed; two a little larger, behind and outside of these, then two 

 others directly behind the first pair. Next, on each side, a tooth much 

 larger, pointed, with a conspicuous cusp on the outer side at base, and 

 one or more denticulations beside. The other teeth are larger, similar, 

 but more serrated and more oblique, approaching the lower teeth in 

 form. The median tooth in the lower jaw is broad, with a small median 

 cusp and two or three larger lateral cusps on each side. The other 

 teeth, 6 on each side, are much broader than high, with about 4-6 sharp 

 outward-directed cusps. The first cusp is longest and bears a small 

 tooth near its base. These teeth are quite similar and increase slightly 

 in size outwards. Tail long, 2f in total length, the caudal fin mostly 

 below it. Anal small, just behind the small dorsal. Coast of California 

 and northward ; common. 



"(Notorhynchus maculatus Ayres, Proc. Cal. Acad. Nat. Sci. i, 72 ; not Nutidanus indicus 

 Cuvier, etc.)" 



Page 36, fourth line : After " small " add " or wanting". 



Under " * ", after " thick ", instead of " usually with rayed", etc., read 

 "with two dorsal fins". 



Under '<**", instead of the text, read: " Tail with one dorsal fin, or 

 none." 



Page 58: After " Rliinobatns productus " add : 



" Anterior nasal valve prolonged to the internal angle of the nostrils ; snout not 

 elongate. (SyrrMna* Muller & Henle.) 



"45 (&). K. exasperating Jordan & Gilbert. 



" Disk rhombic, about as broad as long. The snout prominent, but 

 bluntish at tip, anterior margin of pectorals forming less than a right 

 angle. Eyes rather large. Eostral ridges separate their whole length. 

 Tail stout, depressed, with a narrow lateral fold, upper surface entirely 

 covered with stout, close-set, stellated prickles of different sizes, largest 

 on the bases of the pectorals and smallest on the outer edges of the fins, 

 those on the tip of snout and anterior edge of the pectorals not enlarged. 

 Stout, bluntish, slightly recurved spines present as follows : One at the 

 upper anterior angle of the eye and two behind it; one large one at the 

 middle of the shoulders, in front of which are two others ; two series on 

 the shoulders outside the median line, the inner of two, the outer of two 

 to four ; a series of about a dozen on the median line of the back and 

 tail ', no lateral series on the tail. Sexes similar. Under side covered 



* Miiller & Henle, Plagiostoinen, 113: type Syrrhina columnce M. & H. (ovv, to- 

 gether; ply, snout.) 



