524 



PROCEEDINGS OF THE NATIONAL \llsi:i \i. 



vol. 38. 



rounded. Fin membrane from last rays of dorsal and anal reaching 

 to base of caudal rays. 



The color is entirely lost in our specimens with the exception of a 

 small dark spot at the top of the spinous dorsal. 



T/ialassop/trijnc megalops differs from the other species of the genus 

 in the very large eye and in the large, broad incisor teeth, which arc 

 proportionally two or three times as broad as in the other species. 



We have examined and measured two specimens, the larger the 

 type, both of them Xo. .'J7669, U. S. Nat. Mus., from fisheries steamer 

 Albatross, station 2142, in the Gulf of Darien, at a depth of 42 fathoms. 

 Taken March 29, 1S84. The specimens are 5.4 cm. and 6.9 cm. 

 long, respectively. 



Measurements of the type and cotype of Thalassophryne megalops. 



Total lengtb 



Standard length 



Body: 



Depth 



Width 



Depth at ventral tins 



Depth ol Caudal peduncle. 

 Head: 



Length 



Width 



Interorbital width 



Length of snout 



Length of maxillary 



Do. 



Diameter of orbit 



Dorsal (spinous i: 



Distance from snout . . . 



Length of base 



Height at lirst spine 



Height at second spine. 

 Dorsal (soft): 



Distance from snout. . . 



Length of base 



Height at lirst ray 



Height at longest ray. . 



Height at last ray 



Anal: 



Distance from snout. . . 



Length of base 



Height at lirst ray 



Height at longest ray. . 



ibight at last ray 



Caudal: 



Length of middle rays. 



Length of outer rays. . 

 Pectoral: 



Distance from snout . . . 



Length 



Ventral: 



Distance from snout. 

 Length 



Branchiostegals. 



Dorsal 



And 



Caudal 



Pectoral 



Ventral 



Cotype, No. 37669, U.S. Nat.. Mus. 



5.4 cm . 

 4.3 cm. 



.279 3 



.250 3 



.209 4 



.105 3 



.372 

 .326 



.(17(1 

 .047 



.186 

 .233 



.070 



.58 in standard length. 

 ,91 in standard lengl h . 

 ,79 in standard lengl h 

 54 in head 



09 in standard length . 

 07 in standard length . 



3 in head 



92 in head 



38 in standard length. 



in head 



29 in standard length. 



6 in head 



3 in head 



.337 2 



.116 3 



.139 2 



.116 3 



.465 2 



.535 1 



.116 3 



.174 2 



.070 5 



97 iti standard length. 



20 in head 



68 in head 



,20 in head 



15 in standard length . 

 87 in standard length. 

 20 in head 



I I in head 



32 in head 



.512 1.95 in standard length. 



.488 2.05 in standard length. 



.093 LOO in head 



.116 3.20 in bead 



.093 4.00 in head 



.256 1 

 .163 2 



.390 2 



.256 3 



I 



4.". in bead. 

 28 in head. 



,53 in standard length 

 91 in standard length 

 41 in bead 



.233 I 



.163 6 



2 



5 



II L9 

 17 .... 



14 



13 



,29 in standard lengtb. 

 .13 in standard length . 

 2s in head 



Type, No. 37009, L s. Nat. Mus. 



0.9 cm. 

 5.5 cm. 



.291 3.44 in standard length. 



.291 3.11 in standard length. 



.200 5.00 in standard length. 



.096 4.17 in head. 



.400 2.50 in standard lengtb. 

 .327 3. or, in standard length. 

 .073 5.5 in head. 



.055 7.'_'7 in bead. 



.182 5.49 in standard length. 



2.2 in head. 

 .255 3.92 in standard lengtb. 



1 .6 in head. 

 .073 5.5 in bead. 



.364 '-'.7."i In standard length. 



.100 4.00 In head. 



.109 3.70 in bead. 



.127 3.14 In bead. 



.491 

 .509 

 .109 

 .145 

 .082 



.,-,09 



.491 



.073 



.136 



.1(H) 



.255 

 .136 



2.04 in standard length. 

 1.96 in standard length. 

 3.70 in head. 

 '.'.70 in head. 

 1.88 in head. 



1 .96 In standard length. 

 '.'.Ill in standard length. 

 .'.. Is ill head. 

 2.94 in head. 

 4.00 in head. 



1.57 in head. 



2.94 in head. 



.400 2.50 in standard length, 

 .'-".il 3.41 In standard length. 

 1.37 in bead. 



.'.'...I 



.'.'(HI 



0. 



II is 



17. 

 II. 

 II. 

 1 , -'. 



3.92 in standard length. 

 "i mi in standard length. 

 '-'.(H) in head. 



