PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 239 



specimeus, differing from the typical S. floridos in the following charac- 

 ters: The dorsal covering 2 + 5 or 6 rings, the keel of bellj^ di&tiuct, no 

 cross- bars on sides of body ; D. 29 to 31, rings 19 to 20 -f 33. These, 

 perhaps, represent a distinct species, but we think it more likely an ex- 

 treme variation of S.Jioridcc. 



9. Siphostoma affine (Giintber) Jordan & Gilbert. 



Manj' specimens obtained in greater abundance than any other species. 

 D. 25 to 28. We have also examined two specimens of this species in 

 the museum of Yale College, collected by Prof. C. F. Hartt at Abrolhos 

 Eeef, off the east coast of Brazil. 



10. Siphostoma louisianae ^Giintlier) Jordan & Gilbert. 

 Seven specimens in the collection. 



12. Siphostoma McKayi, sp. nov. 



Head 5| to C^ in total length ; D. 29 to 31 ; rings 18 + 33 to 34. 



Snout rather long, compressed, If to 2 in head, its median line with 

 a slight keel above and below, with smaller keels on each side ; opercle 

 not keeled. 



Dorsal somewhat higher than width of a body ring, its base about 

 1^ in length of head, covering 2 -f- 6 rings. Pectoral higher than length 

 of base ; tail about If in total length of fisli ; body deep ; its greatest 

 dejith in adult females equals width of t body rings. 



Color in spirits grayish or dark olive ; the males often with gray 

 cross-bars on the sides ; the body is usually more or less spotted with 

 small white spots. Dorsal pale, usually dotted over with darker; caudal 

 dusky, generally spotted with white ; opercle usually with white bars. 



This species is described from three female and six male specimens, 

 obtained by Professor Jordan at Key West. Some of these typical 

 specimens (No. 34989) are now in the United States National Museum. 

 This species is named for our friend and fellow-student, Charles Leslie 

 McKay, of the United States Signal Service, who recently lost his life 

 in the cause of science in Alaska. 



14. Siphostoma crinigerum Bean & Dresel. 



Bean & Dresel, Proc. Biol. Soc. Wash. II, p. 99. 



Four speciuiens, with dorsal rays 17, covering 0-1-4 (one example J 4- 4) 

 rings ; rings IC -j- 37 ; snout very short, 3 in head ; size small. Two 

 specimens of pipe fish in the museum of Yale College, obtained by Prof. 

 C. F. Hartt at Abrolhos Reef, off the east coast of Brazil, appear to 

 belong to this species. 



Indiana University, February 26, 1884. 



