64 CONTRIDUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV, 
With shao-reeii, made of triangular depressible asperities. Eegiou froui 
the nostrils to the shoulder girdle smooth, except the lower lip. A few 
other small naked areas below. Upper lip developed. Teeth ff . Color 
brown, mottled and barred with blackish; a black blotch on hinder part 
of pectorals below. Tail rather shorter than disk. First dorsal not far 
behind ventrals. Snont one-fifth the length of disk, twice the interor- 
bital space. San Diego Bay ; abundant. Only young specimens known, 
but it is probably’ ovoviviparoiis and therefore not a Haioid. 
“ (Plati/rliina exaspcraia Jordan & Gilbert, Proc. U. S. Nat. Mas. 1880, 32: Zapteryx 
exaspcratun Jordan & Gilbert, Proc. U. S. Nat. Mus. 1880, 53: Trygonorkina exasperata 
Garnian, Bull. Mus. Comp. Zool. 1880,170.) 
“45 (c). K. ti’BSei'ialiBS Jordan & Gilbert. 
“Disk broad, ovate, broader than long. The snout very bluntly 
rounded, not projecting, the angle formed by the pectorals anteriorly 
very obtuse ; anterior outline of the iiectorals slightly convex, not undu- 
lated. Tail very stout, much longer than the disk, its edges with a 
broad fold, broader than in R. exasperatus. Pectoral fins extending 
almost to the tip of the snout ; rostral ridges wide apart, converging, 
inclosing a triangular area. Eyes small, wide apart, the broad spira- 
cles close behind them. Caudal fin well developed above and below. 
Dorsals similar, their i)osterior free margins very convex. Mouth 
broad, its width nearly equal to its distance from tip of snout, a deep 
crease passing around it behind, in front of which the lower lij) has three 
folds of skin ; upper lip not developed, a fold of skin passing from the 
angle of the mouth on either side to the inner angle of the nostrils, 
thence straight across, inclosing a dejDressed trapezoidal /^-shaped area, 
bound below by the curved outline of the upper jaw. In this are three 
cross-folds of skin. Teeth |^. Gill-openings narrow. Skin every- 
where, above and below, covered with fine shagreen, the prickles coarser 
on the anterior outer margin of the i^ectorals ( ), where are two or three 
rows of retrorse spines. Four strong spines on the tip of the snout, 
forming a rhombic figure; four or five spines around each eye. A long 
series of very strong spines along the median line of the back and tail, 
and a series of similar ones on each side of the tail ; a single strong spine 
on the outer edge of the shoulder-girdle and two between this and the 
median series. Color light olive brown, without distinct markings. L. 2 
feet. Breadth ot disk one-tenth more than its length; tail usually half 
longer than disk ; snout two-ninths of length of disk, not half longer 
tlian \\ idth ot interorbital area. Coast of California from Point Concep- 
cion southward; abundant. In sinte of its resemblance to the Eaioid 
