558 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 
curve to the occiput, thence straight to,the subconic snout, which 
projects beyond the front of the premaxillaries half its horizontal 
projection beyond the eye. The tip of the snout bears two rather 
prominent spiny tubercles; preocular length of snout, 3.25 in head; 
preoral length, 4.0; length of orbit, 3.0. The least interorbital width 
is nearly equal to the length of the orbit: the suborbital is wider 
than the pupil. The upper jaw extends backward to below the pos- 
terior margin of the pupil; its length is contained 4.4 times in the 
head. The gill-membranes unite below the preopercular ridge; there 
are seven branchiostegal rays. 
The scales are armed with about 10 slightly divergent rows of 
spinules. The scales are larger than in condylura, there being but 
9 (8 to 94) instead of 11 rows between the origin of the second 
dorsal fin and the lateral line series. 
The center of the anus is a little nearer to the origin of the anal 
fin than to the insertion of the ventral. 
The second dorsal spine, which is strong basally, is armed with 
12 (9 to 15) rather large and well-spaced denticulations. The 
lengths of the various fins are given in the table of measurements. 
Color in alcohol, light brown, becoming blackish, with a silvery 
sheen, on the opercles and over the coelomic cavity. The buccal and 
branchial cavities are lined wholly with blackish except near the 
corners of the mouth and along the edge of the opercular and branchi- 
ostegal membranes. The black color of the parietal peritoneum is 
underlain by silvery. ; 
Table of measurements in hundredths of lengths to anus. 
| 
Alvatross Staion] eras eee cee 5621 5621 5621 5589 5589 | 15589 5589 | 5589 
Totallenrth Anam Ss fee see 2132 131 2125 2117 2146 164 157 107 
Length toanus in mm...............- 32.5 SIE eee 34 Shel voeceee = 33 25 
Ihensth'opheadus -< se sesensn cee cee 75 pees same 80 TOP Saeco 7 81 
Tsength: of orbit .~ =. sss... boss eee 24 26 |cceeene | 27 OK emesis 27 30 
Width of interorbital................. 19 1O7 | Peeece | 20 19 Hee ee 22 22 
Width of suborpital. <0... --ssseen one 10 LUNG Beate 12 1b ee tee ll 12 
Orbititoipreopercle===22 35 eS 24 26) \|Ssiacsacs 28 OY fis eee tee 28 27 
benz th iOhSnote.--ceeersee eae 22 76s ee oO | 22 Pn as See 27 26 
Length of uppenjaw -: = .2cs.2s.-ceeee 22 2D iotere aces 25 DSN Eee 22 25 
Lengthiofibarbele<. 52) s-seeee sees 12 Gis Be eee | 13 13+ |S sees soe 12 14 
Depth ofbodysoetser oe 0 fees ee cee tee eee eee ena cece 85 SOS See eeee 69 
Height of second dorsal spine... . ..-- 68 tds ets Sees 7 f= eee chai 73 82 
Height of third dorsal ray.......-..--- 62) Pes ae essa eee oe Sener See tee 64 71 
Length of first dorsal base...........- 23 7a OPE 27 7 ae 23 26 
InLerdorsalispace.--- coe cee 2 ce eeeeee 18 yt fe Pia 34 5 Cs ee eenge 32 34 
Length«of pectoral Sc. 4 sce. - fee pd 39 SOME ae oe 44 Co) Bae 47 40 
Length of outer ventral ray........-.| 7 OAM IE earns se ae 62)|-2 52S 68 68 
Length of second ventral ray.......-. D1) ee See Rea een pe oe 27. | 31 2h 5A] sae 25 
SOluraysursiaorsalesceseeey ncaa 12 11 127} 11 11 13 9 ll 
Ventralirayss= )seses eee "Aaa 14] 14,15 | 13,14 | 15,15 | 15,15] 15,13 | 11,144 13,13 
Pectoral rays pce cren ee eee ee a hae PLN dip nse ela See 20 21) |. Soeeeee 
Seales (series separating lateral line | 
from origin of second dorsal)... ...- 9 9 8 | 9 9 9 9 94 
Denticulations of dorsal spine. ....... 12 Tt pees 2 15 14 10 12 10 
Gill-rakers, second arch. ...........-.- Th |e ee piles See fel eee eee too. 5 seen See 
Sexs. 52k Be ee ee Sh ks eo (5) (4) (3) | (4) (8) nl ae eeats (8 en pee eee 
| 
1 Type-specimen. 2 Pseudocaudal developed. * 3 Male. 4 Adult female. 
(evides, pretty.) 
