Fishes New to the Fauna of Porto Rico, etc. 21 



One specimen, dug from mud flats near mangrove island west of Guanica 

 Harbor. Length, 7 cm. 

 Type, No. 3082, Zoological Museum, Princeton University. 

 Named for Mr. Thomas Keck. 



BELONID^. 



Tylosurus notatus (Poey). 



One specimen, 26 cm. long, seined among mangrove islands west of Guanica 

 Harbor. 

 No. 3121, Zoological Museum, Princeton University. 



SYNGNATHID^. 

 Corythroichthys ensenadse sp. no v. Plate 2, fig. 3. 



Rings 18+33; dorsal 19, on 1+4 rings; pectoral 12; caudal 10; anal 2. 

 Head 9. Eye 5. Body 1.5 in tail. Cranial ridges strong, median keel on 

 snout to middle of eye; ridge on occiput high, notched in front and behind. 

 Supraocular ridge beginning in tubercle in front of center of eye; two ridges 

 on opercle. Nostril double, in front of and near eye, tubed, dorsal tube 

 short, ventral tube longer. Keels on body and tail strong; lateral keel of 

 body running into ventral caudal keel. Belly convex, keel strong. 



Body with 22 yellow and 22 brown bands, each covering from one to two 

 body rings, some of which divide on the ventral surface of belly into rings 

 and blotches of brown. Brown bands edged with darker. Bands on snout 

 become irregular spots and blotches. First brown band crosses interorbital 

 space through eye and obliquely downward and backward to large brown area 

 on ventral surface of opercle. 



Closely related to C. alhirostris, but well defined in color-markings. 



Vertebrse and body rings correspond. 



Type, No. 3084, Zoological Museum, Princeton University. Length 10.5 cm. 



From bunch of coral off Ballenas Point. 



Named for a party of friends from Ensenada, who obtained this specimen. 



CHEILODIPTERID^. 

 Ami a conklini sp. no v. Plate 3, fig. 1. 



Head 2.6; depth 2.7; eye 2.6; interorbital 3.2; dorsal VI-I, 9; anal II, 9; 

 scales 2-27-7; eye large, 2.5 in head; head broad; mouth rather large. 

 Lateral line complete, following curve of back to caudal peduncle, where it 

 dips down to center line. Anterior nostril near front of snout; posterior 

 nostril large oval opening in front of center of eye. 



Color orange-red with clusters of small black specks bordering scales over 

 entire body. Caudal peduncle with large oblong black spot; caudal edged 

 with black; spinous dorsal black; soft dorsal and anal with black bar at base; 

 a black bar extending downward and backward on front of preopercle from eye ; 

 another bar extending transversely on nape and down on opercle, where it is 

 more or less broken up into series of dots. 



Differs from A. sellicauda in color markings, larger eye, and more robust 

 body. Examples of ^. sellicauda were obtained on the same coral reef, and 

 this species differs distinctly from A. conklini, the proportions and color mark- 

 ings being quite different. A. conklini does not fade to white in spirits and 

 the clusters of minute dark dots bordering each scale do not fade. 



Two specimens, 4.5 and 5 cm. long, obtained with dynamite on coral reef 

 off Guanica Harbor. 



TjTpe, No. 3080, Zoological Museum, Princeton University. Length, 5 cm. 



Paratype, No. 3128, Zoological Museum, Princeton University. 4.5 cm. long. 



Named for Professor E. G. Conklin. 



