520 PROCEEDINGS OF TEE NATIONAL \W8EUM. vol.38. 



Head 2\ to 3. Depth 3} to I. D. 11-20. A. 19. P. 14 to 16. 

 V. I, 2. C. 14 to 15. 



Body short and thick, compressed behind. Head low, about as 

 lone; as broad. Eyes very small, less than snout, about half inter- 

 orbital width, ( .»l to 1'-' in head. Tnterorbital width 4§ to h\ in 

 head. Opercular spine about 3 in head. Mouth oblique, the lower 

 jaw much projecting. Maxillary 2\ to 2\ in head, reaching behind 

 eye. Mandible H to 1§ in head. Teeth moderate, largest on 

 palatines, in two rows on front of mandible, in a very narrow band 

 on premaxillary, elsewhere uniserial. The teeth are rather bluntly 

 conical and somewhat flattened at tip. Pectoral fins obliquely 

 rounded, \\ to If in head, reaching about to sixth anal ray. Caudal 

 rounded. The membrane from the last rays of dorsal and anal 

 reaches to about the middle of the outer caudal rays in one specimen, 

 to the base of these rays in others. 



Color in alcohol: Brownish above, becoming abruptly white below 

 in the cotype of 'Hi<ilassoplrryne 'nattereri. In this specimen, as in one 



other which we have examined, the fins are all 

 margined with white, below which is a dark band 

 which is darker than the eolor of the back. In 

 the third specimen examined the dorsal lacks the 

 a white margin and the color is much darker, prac- 



Fig. 6.— Tooth of THA. ' . , , , , 



LASSOPHRYNE MACULOSA. t ICally as deSCH I >ed TOT I ll (I tOSSO ]>/< VIJ ll ( III II CHlOSd. 



X16DIAMETERB. fish, 16 \y e can fj n ,i 11() characters which will separate 



Thalassophrym maculosa Gunther and Tlialasso- 

 pTiryne nattereri Steindachner. In the original descriptions they are 

 separated by the color and by the supposed fact that one had one 

 more ray in dorsal and anal than the other. In our examination we 

 find that the cotype of Thalassophrym nattereri has the (in count of 

 Thalassophrym maculosa, while another specimen very similar to the 

 cotype and one intermediate in coloration or nearer to Thalasso- 

 jifirijiii maculosa have the number of rays assigned to T. nattereri. 

 We have examined three specimens of this species, as follows: 

 No. 12726, Mus. Comp. Zool., Para, Brazil. Coll. L. Agassiz, 

 Thayer Expedition. One specimen 10.6 cm. long. Cotype of 

 Thalassophrym natU reri. 



\o. li'T'-M, Mus. Comp. Zool., Curuca, Brazil, a small place on the 

 coast just south of the month of the Amazons. Coll. L. Agassiz, 

 Thayer Expedition. Two specimens, 13.7 cm. long and 1(1 cm. long. 



