210 PROCEEDINGS OF THE ACADEMY OF [March, 



Stream, probably from some tropical region in America ? It seems 

 to be most closely related to Pellona bleekeriana Poey, 1 but according 

 to the incomplete account of that species I am unable to consider them 

 identical. Still further, I am obliged to allow them as separable, for 

 Poey's account in some respects seems to strikingly disagree. Poey's 

 fish was 100 mm. long and had the eye 3+ in its head, while in my 

 specimen, which is larger and consequently would be expected to 

 have an equally small eye at least, it is 3 in its head. The greatest 

 body depth in the total length of my example could not possibly be 

 over 3f (even when its damaged caudal is allowed), while Poey alleges 

 5§. According to Poey, the thickest part of the body is f its greatest 

 depth, while my example shows this clearly less than ^. Poey says 

 the maxillary reaches opposite the hind pupil edge, while in my 

 example it does not even reach opposite the middle of the eye. Poey 

 gives the teeth as somewhat long and curved, with a canine above 

 and 2 below each side. My example shows no canines whatever. 

 Poey says no teeth on the tongue, though my example shows it as 

 asperous medianly. Poey gives the serratures as 25, while my example 

 shows 32. Poey's example is said to have very caducous scales, while 

 in mine they are largely adherent. Poey describes his fish as white, 

 with a little pronounced silvery streak, which latter is not at all 

 evident in my example. Pristigaster flavipinnis Valenciennes 2 differs 

 in having much smaller scales, about 65. Pellona castelnceana Valen- 

 ciennes, 3 which has been considered a synonym of the last, is too 

 imperfectly described for positive identification. The occurrence of 

 this fish, as far north as Rhode Island, is the most northern point at 

 which any species of Ilisha has yet been found. 



(Named for the country of the Narraganset Indians, now largely 

 Rhode Island, where the type was secured.) 



Ilisha hoeveni (Bleeker). 



Padang, Sumatra 3, of which 1 now in Stanford University. 

 Ilisha hrachysoma (Bleeker). 



Padang, Sumatra 1. 

 Opisthopterus macrognathus (Bleeker). 



Padang, Sumatra 1. 



Odontognathus mucronatus Lacepfede. 

 Surinam 2. 



1 Repert. Fis. Nat. Cuba, II, 1866-68, p. 242. Matanzas. 



2 Voy. Am. Mir. Orbig. Poiss., 1847, p. 8, PI. 10, fig. 2. Buenos Aires. 



3 Hist. Nat. Poiss., XX, 1847. p. 222. Mouth of the Amazon. 



