514 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
extends backward from the occipital scute. The scales between the 
occipital and postorbital ridges are reduced in size, excepting those 
in the median series; a strong scute, pointed posteriorly and armed 
with several spinules, is present near the origin of the lateral line. - 
The nasal fossa has a few scales in its anteroventral angle. The - 
underside of the head is completely naked. Six branchiostegals; free 
fold of gill-membranes very narrow. 
A ventral fossa about as long as the pupil and covered by thin 
and nearly smooth scales is located before the ventral fins. The 
usual gland-like organ which this fossa covers shows through the 
transparent scales. It is flat on its punctulate, yellowish outer sur- 
face, and black on its thick, rounded anterior edge and arched dorsal 
surface; it extends backward as a strand of glandlike substance, 
surrounded by a black membrane, to its black posterior dilation, 
which, located just before the anus, is covered by a small area in 
which the scales are thin. 
In the sensory cavity lying in advance of the lateral line there are 
developed small neuromastic bones, like those described in some de- 
tail for Coelorhynchus argentatus (p. 434). 
Eleven pyloric caeca (one specimen examined). 
Table of measurements in hundredths of length to anus. 
elorhynch = F 
oe % ie jeanne Coelorhynchus gladius. 
DYES ON OT OLY DE: | ete 13 esa eects tees Paratype, 
Allbatross:stati0nss3<ssee ees ee Cone eo eae BAIS Fs FATT le. ae el ee 3472 
Total lengthin mm...... 205 190 1237 157+ 57 
Length to anusin mm... 87.5 81 96 65 23.5 
Length of head Seto. = sere sarees oe mee see es eames 72 | 74 70 72 70 
Length (of orbitisten tices soins on aee reoemeae ss 16.5 | 17 14.5 16 22 
Postorbitallenrthomhead a. saceseee es ace ee 21.5 | 22 19 19 20 
Width ofinterorbitalecs 2 S223. tmeneeeee eats 15 16.5 13.5 nak 16 
Width ofsuborbitalle= eyes ofc -2 = sneeeincs stasis aan 9 9 5 8 ii 
Orbittoypreopercle sc -o: coe aos asco s aes aeeels 23 23 19 19 22 
Length of snout: 
ELOOCMIAL 4 <2/-)-ietasiecicastese SOSA Gaon SaeSsons 35 37 36.5 39 31 
fag a 2(0) 0: | Pe Rae Ane SOA aE Sessa 31 31 33 36 27 
Width of snout: 
INTID ASO setae ce see eens aa ea eae Sa seaeeacses< 23 25 21 22 27 
At end of ethmoid portion of infraorbital ridge...) 17.5 19 15.5 18 24 
Length of terminal rostral plate.........-.....------- 10.5 10.5 13.5 16 7 
Genethiofupper iawees-seessee ces eases neeee eee 15 15 13.5 15 19 
Tenpth’ of barbelit.s22-- es. s..ssse eee ean eee 4 4 5 4 cle ees 
Depth of body below origin of first dorsal........-...- 33 35 27 27 32 
Depth of body at twice length of head behind tip of 
SMUG hse ere ae cin cecal elem eee ipa een eerie 12 10 16 12 15 
Width of body across pectoral bases...........-..... 23 22 26 22: © | Siero 
Width of body at twice length of head behind tip of 
SNOUGE Ios etek 3 To ee cen Soe eR ee es eee ee | 4 oan 10 8 i 
Anus)to:ventrals...2-.5-s8em -)-. seemcice tems oe ae 24 21.5 26 2) 27 
Ventral toisthmus 12sec sees cea sees 23 21 17 18 19 
Height of second: dorsal|spine -=227.. 2 2.--see -seeeees 25 22 33 33/4 Saceteaeae 
Length: of first dorsal baseler. on eseee cose cee ee anaes 11.5 10.5 12 Vs ee Semen 
Length of first ray of second dorsal ...........--.-.-- 4 4 9 Oise Seema 
Lenpth’ of interdorsal'spaces:.- 02 es. 2. weccsedececnes 10 8 8 ised Pe ee ee 
Length: of-pect oralin25,.9=- sss quae wen see eae oe aoe eee 21.5 25 26. 5 26) 56|2cceeeeees 
Length ofouter ventralrayicece sso) oe cece eet oe ee 23 21 24 26 41 
Length of second ventral ray...............-..------ 15 15 16.5 17, \|peeseaeeee 
Fin rays: 
Hirstidorsales.: sae ae eeeeeaeaee pie Tyce sate Saas II,8 27,8 II,9 T¥,.9 | scsceeeeee 
Peeborals fae tse Fe ee ee eee 16-15 14-13 18-17 A9=1O Mosca ene 
Vemntrals: «sci. cio 20, sats eet ere, aes eee 7 7 7 7 (rete stereos 
1 Pseudocaudal developed. 2 First dorsal rays II, 8 in each of the four specimens, 
(acutirostris, in reference to the sharply acuminate snout.) 
