142 Bulletin American Museum of Natural History. [Vol. XXXIV, 
Tylosurus euryops, Bean & Dresel. 
Small needle-fish were common in San Juan Bay. A few specimens 
obtained are referred to this species, after comparing a specimen with a 
euryops of approximately the same size from Jamaica in the U. S. National 
Museum, which is marked as the type. The species is close to timucu 
(Walbaum) of which it may possibly be the young. 
Doryrhamphus sierra sp. nov. 
The type, No. 4840, American Museum of Natural History, was taken in drifted. 
weed at the mouth of the Loiza River, east of San Juan, July 25,1914. Itis 79 mm. 
long to base of caudal; head 5.9 in this measure; depth 5.6 in head, snout 1.7, eye 
8.8, postorbital part of head 3.5. Slender, snout long, tail very slender, tapering; 
ridges high, sharp, serrate, a moderate, thin, finely serrate, central keel, rising on the 
terminal half of the snout ends abruptly before the eye. A well marked keel flanking 
each eye above, serrate posteriorly; a short, low, serrate scapular keel. A similar, 
but longer one crosses the opercle, with three low backwardly radiating keels below it; 
Beg 
nupHien Y 
a series of serrate mid-dorsal keels 
from behind the eye to behind the 
AN 
Ae 
pectoral; body squarish, the four | a fe 
corners, two slightly angled mid- cS g 
lateral lines, and the slightly angled 
mid-ventral line bearing sharp re- 
trorse, serrate keels, so that each Fig. 1. 
ring bears seven saws, independent 
from those of the next ring, with graduated teeth, increasing backward; the mid and. 
latero-ventral keels cease at the vent, the mid-lateral slanting down to become latero- 
ventral on the tail; the latero-dorsal keels cease near the dorsal axil, their place on 
the tail being taken by a keel which arises over the mid-lateral a ring before the 
vent. Vent about half way between base of caudal and front of eye, rings 20 -+ 25. 
Dorsal on 23 + 53 rings, moderate in height, its base 1.3 in head, with about 48 
rays. Caudal large, a little longer than head without snout; anal small, a little 
shorter than eye. Color in spirits olive, obscurely mottled lighter and darker, a 
dark stripe before the eye. Tail dusky with five white rings, somewhat irregular 
in size and placement. Dorsal colorless; caudal dusky. 
Ip Ss 
=f 3 
Leta a, BS 
2 EST ral 
ss 
Doryrhamphus sierra sp. NOv. 
Besides the type we have 13 similar specimens collected with it, No. 
4841, American Museum of Natural History. When fresh, their color was 
blackish, tail with 4 or 5 white rings, caudal blackish, its lower margin white. 
The tail of one of the specimens was wasted and soft, and immediately 
