282 PROCEEDINGS OP THE ACADEMY OF 



Family CYPRINOIDjE. 



Subfamily CYPRININ^E. 



Carassias auratus Heckel. 



Two abnormal varieties of tbis species, tbe common and well-known 

 "Gold-fish," are in the collection. One of them has the tail doable, but 

 connected at the superior margin. 



Family GALEORHINOIDjE. 



Subfamily GALEORHININ.E. 



Triacis semifasciatus Girard. 

 A young specimen was sent. 



ISOPLAGIODON, Sp. 



A new species of this family is in Mr. Hubbard's collection. As the single 

 specimen is a young one, its positive determination is deferred for the 

 present. 



Family RATOIDJS. 

 Subfamily RAIINJE. 



Uraptera binoculata Girard. 

 One specimen. 



Synopsis of the species of LOPHOBRANCHIATE Fishes of Western North 



America. 



BY THEODORE GILL. 



The present brief article is preliminary to a more extended paper on the 

 Lophobranchiate fishes inhabiting the Western coast of the North American 

 continent. Six species have been attributed by Dr. Girard to that coast. Sub- 

 tracting from that number one which appears to have been founded on a 

 smaller individual of the common species described by Girard as Syngnathus 

 californiensis, we have still the number assigned by Girard ; the S. calif or - 

 niensis of that author being distinct from the homonymous species of Storer, 

 as shown by Ay res. All the species noticed are in the collection of the Smith- 

 sonian Institution. 



Family SYNGNATHOIDsE Bleeker. 



Subfamily HIPPOCAMPINiE (Kaup.) Gill. 



Genus Hippocampus Cuv. 



1. Hippocampus gigas Girard. 



2. Hippocampus gracilis Gill. 



The body is very slender, the height being contained four times and a half 

 in the length of the tail, or equal to the distance of the snout from the hinder 

 border of the orbit. The tube forms about half the length of the head, which 

 forms rather more than a sixth of the length. The spines at the angles of 

 the frontal triangle are nearly equal and blunt. The coronet is rather ele- 

 vated ; the temporal spines rather large and blunt. The angles, especially 

 the dorsal, of every third or fourth plate are tuberculous. 

 10(3) 



D. 10. Plates . 



10 (1) 38 



[June, 



