DEPARTMENT OF MARINE BIOLOGY. 215 



but very short and rudimentary. Isthmus about 3 times width of gill-opening. Numerous 

 pores on top of head and on lower jaw; large round pore on center of opercle. Anterior nos- 

 tril near end of snout in large tube which projects downward. Posterior nostril under eye 

 in lip. Dorsal well developed, begins on nape and extends to near tip of tail; anal very low, 

 beginning directly behind vent and extending to near tip of tail. Tail very little projecting 

 beyond dorsal and anal. 



Color in life very light transparent green, darker above, series of about 20 darker spots 

 along lateral line, hardly distinguishable in life. 



Branchial chamber rather large. 



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 my friend, Mr. Thomas Keck.) 



SYNGNATHID^. 

 Corythroichthys ensenadae sp. nov. 



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 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 yeUow and 22 brown rings, which divide more or less on ventral surface of 

 belly in rings and blotches of brown. Bro\\Ti rings edged with darker. Rings on snout 

 become irregular spots and blotches. First complete brown ring crosses interorbital space 

 through eye and obhquely downward and backward to large brown area on ventral siuface 

 of opercle. 



Length, 10.5 cm. 



Type, No. 3084, Zoological Museum, Princeton University'. 



From bimch of coral off Ballenas Point. 



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



BELONID^. 

 Tylosurus notatus Poey. 



One specimen 26 cm . long. Seined among mangrove islands west of Guanica Harbor. 

 No. 3121, Zoological Museum, Princeton University. 



CHEILODIPTERID.E. 

 Apogonichthys stellatus (Cope). 



Three specimens 1.5 to 2.5 cm. long. This fish hves in dead sea-urchin sheUs. Almost 

 every sea-urchin skeleton in small muddy area west of Guanica Harbor was inhabited by 

 one of these fishes. 



No. 3048, Zoological Museum, Princeton University. 



Amia conklini sp. nov. 



Head 2.6; depth 2.7; eye 2.6; interorbital 3.2; D. VI-1, 9; A. II, 8-9; scales 2-27-7; 

 eye large ; head broad ; mouth rather large. Lateral line complete, following curv^e of back 

 to caudal peduncle, where it dips down to center Une. 



Color orange-red with clusters of small black specks over entire body. Caudal peduncle 

 with large oblong black spot; caudal edged with black; spinous dorsal black; soft dorsal and 

 anal with black bar on 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. 



Two specimens 4 and 5 cm. long obtained with dynamite on coral reef off Guanica Harbor. 



Length, 5 cm. 



Type No. 3080, Zoological Museum, Princeton University. Paratype No. 3128, Zoologi- 

 cal Museum, Princeton University, 4 cm. long. 



(Named for Professor E. G. Conklin.) 



