PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 135 
Raia cooperi has the snout acutely produced, rather more so than in 
Rk. binoculata, though less than in the variety referred to, the distance 
from the eye to the tip of the snout being about twice Bae interorbital 
width. The length of the disk is $ its width; the tail is 2 the length of 
the disk. The female is covered above with small dreltte prickles, 
which are larger over the eye, on posterior edge of pectorals, on ven- 
trals, the middle line of the back, and on the tail. Prickles on tail in 
several series. Differentiated spines present only over eye and on 
tail. The male is nearly smooth, its spines essentially as in R. bino- 
culata. Color brown, with paler blotches; a large, obscure, blackish 
blotch at base of pectoral. This species has scarcely a trace of caudal 
= 
fin, and is therefore likewise an ‘‘ Uraptera.” Its teeth are 
Whether this Raia cooperi is a distinct species or merely very old ee 
viduals of Raia binoculata we are now unable to decide. There are no 
important differences, except such as might accompany increased age. 
Table of measurements. 
| | : 
A x Raia 
Raia Raia pee 
stellulata. 9 | binoculata. J | binoculata 
| var.?Q 
PixineMmenene thy 1) INCNOS=: toms a emis cseccccmeeaesic- ce asa-e 17. 45 21.6 28.8 
enc ihn dis kminvinchesaes taser smieser cise: at« clsleieclecinles 2a. 10. 10 13. 00 18. 4 
Disk: 
Greatest width (hundredths of length of disk). ---.-....-- 121 106 103 
Greatest width at front of eyes .---....-..-------------- 58 45.5 41 
Width of snout, midway between eyes and tip of snout. 41 16.7 14 
Distance from shout to first gill-opening --.--.---------| 43 DONS laescsaesescee 
Distance between first gill-openings..-...--.----------- 31.5 25D Sse cose acess 
Distance between last gill- openings ...-.---------.---.- 18 FAS Sn) Sesemecelee ae 
Distance from first to last gill-openings .-.............. 14 12.8 12 
Wa CUnrOm MOU ec ettece sesso Seieacte one seamiccisics ances 18 15 15.5 
NICHOL AnLOLOY DUAL SPaACe fe aecee eee e os ccaewewecncs 8 7 8 
Distance from snout to mouth..-.....-...---...-...---- 24 21.5 30 
Diameter OUOLDLUL Se ee seco eee aca eetatadecesclekeues 8 6.2 5.5 
Tail: 
ILE, £3 oe Be eee SE an ae a 71.5 67 57 
Distance between dorsals .....-----------2++esececeee 5 3.8 3 
OI binOmnr Nt dorsale see seen emcees cbcnces cceeecne ce 8 So losecioosansécac 
Length Oiabase Onis iGOrsal ssn eecans- 64-2 <5-s—- cs 7.5 7.6 7 
MONTEREY, CAL., April 7, 1880. 
DESCRIPTIONS OF NEW SPECIES OF XIPHISTER AND APODICH- 
THYS, FROM MONTEREY, CALIFORNEA. 
By DAVID S. JORDAN and CHARLES H. GILBERT. 
1. Xiphister chirus sp. noy. 
Body elongate, somewhat compressed, formed as in Yiphister mucosus 
(Xiphidion mucosum Girard). Head short, convex in profile, not de- 
pressed above the eyes. Mouth small, oblique, the maxillary extending 
to opposite middle of pupil. Eye small, as long as snout, about 5 in 
head. Lower jaw slightly projecting. Teeth strong, the anterior canine- 
like, bluntish; four canines in lower jaw, six or more in the upper, similar 
