PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 519 



Two species have been indicated, but whether thej^ are really dis- 

 tinct remains to be established. Both are represented in the U. S. Nat. 

 Mns., but the Chilian form is in very poor condition. 



POLISTOTREMA DOMBEYII. 



Synonymy. 



1798 — Gastrobranchus Dombey, LacepMe, Hist. Nat. des Poissons, t. 1, p. 531, pi. 23. 



1829 — Heptatremes Dombeyii, Cuvier, Regne Auimal, 2. ed., t. 2, p. 405. 



1834 — Bdellostoma Dombeyii, Miiller, Abhandl. Akad. Wiss. zu Berlin, p. 80. 



1851 — Bdellostoma Dombeyii, Gray, Cat. Specimens Fishes in Brit. Mns., pt. 1, p. 149. 



1854 — Bdellostoma polytrema, Crira7-d,Troc. Acad. Nat. Sci. Pbila., v. 7, p. 199. 



1854 — Bdellostoma polytrema, Girard, Report U. S. Naval Exped. to Chili, v. 2, p. 



252, pi. 33. 

 1870 — Bdellostoma polytrema, Giinther, Cat. Fishes. Brit. Mus., v. 8, p. 512. 

 1874 — Bdellostoma polytrema, Putnam, Proc. Bost. Soc. Nat. Hist., v. IG, p. 160 (156). 

 1881 — Polistrotrema Dombeyi, Gill with Jordan and Gilbert, Proc. U. S. Nat. Mus., v, 3, 



p. 458, 1881. 



POLISTOTKEIMA STOUTII. 



Synonymy. 



1878 — Bdellostoma Stoutii, Lockington, Am. Nat., v. 12, p. 793. 



1881 — Polistotrema Dombeyi pt., Gill with Jordan and Gilbert, Proc. U. S. Nat. Mus., 

 V. 3, p. 458 ; v. 4, pp. 18, 29, 1881. 



Habitat. — California. 



"Eleven gill openings on each side; ten teeth on the anterior and 

 nine in the posterior series. 15i inches long. Eel Eiver, Humboldt 

 County. 



" It is rather singular that this fish, which is abundant in Eel River, 

 and is sold for food, and also occurs in this harbor, should hitherto have 

 escaped notice. I believe it to be the only species of its genus hitherto 

 found on the Pacific coast of North America; and it difi'ers Irom Bdell- 

 ostoma polytrema, a s])ecies which occurs along the coast of Chili, both 

 in the number of the gill openings and that of the teeth, B. polytrema 

 having fourteen of the former and twelve of the latter in each series." — 

 Locldngton.^'' 



A specimen was received, 1866, at the Smithsonian Institution from 



Dr. Canfield, and on comparison with B. polytrema could not be satis- 



factorilv diagnosed. 



HEPTATREMA. 



Synonymy. 

 = Heptatrema, Dumerilfide authors; * (possibly in his " Dissertation sur les Poissons 



Cyclostomes," which I have not seen.) 

 = Le8 Heptatremes, Dume'ril, Cuvier Regne Animal, 26 ed., t. 2, p. 405. 1829. 

 = Bdellostoma, Miiller, Abhandl. K. Akad. Wiss. zu Berlin, 1834, p. 79, 1836; 1838, 



p. 173, 1839 ; 1841, p. Ill, 1844. 

 <^ Bdellostoma, Girard, Report U. S. Naval Exped. to Chili (provisional name), v. 2, 



p. 251, 1854. 

 * This genus was not proposed in the " Zool. Anal." as Gray and Girard indicated, 

 nor in the Ist ed. of Cuvier's Regne Animal. 



