ADDENDA. 



Page 12. After Entospltenus tridentatus add: 



11 (a). EXTOSPHENUS CAMTSCHATICUS (Tilesius). 



A lamprey taken by Steller in the Bolschaya River, Kamchatka, has not 

 been recorded by subsequent writers. It is reported by Steller as 13^ 

 inches in length; the head ^ of an inch; mouth long, with 2 teeth above, 

 6 below; dorsals 2. Color shining brassy, dark above; sides with dusky 

 serpentine lines. A figure published by Tilesius shows the upper teeth as 

 bifid, and 9 teeth below. 



Pallas describes specimens from the sea at Petropaulski as 7 inches long, 

 not marbled nor variegated. The species of Steller is probably an Entos- 

 phenns. That of Pallas may be the same, or it may be a Lampetra, allied 

 to or identical with L. aurea. 



Petroinyzon marinus camtschaticus, TILESIUS, Mem. Acad. St. Petersburg 1809, 240, with 

 plate, Kamchatka. 



Petromyzon camtschaticus \ TILESIUS, I. c., 241. 



Lampetra variegata (STELLER MS.) TILESIUS, L c., 247, Bolschaya River, Kamchatka. 



IPetromyzon marinus camtschaticus, PALLAS, Zoogr. Ross. Asiat., in, 1810, 67, Petro- 

 paulski. 



Page 14. From the synonymy of Lampetra wilderi omit ''Petromyzon 

 branchialis, Giinther, Cat., vin, 504, 1870," and after the last synonym add: 

 Not P. branchialis, Linnaeus, which is the larva of some European species, 

 perhaps of P. marinus. 



Page 25. In the description of Catulus liter the teeth should read "li 

 instead of $?. 



Page 27. In the key, under dd, read : Root of tail with a conspicuous 

 notch above. 



Page 28. The following key to West Coast species of Galeus and Mus- 

 telus will prove helpful. 



a. Eye large, spiracle small, the latter not more than J major diameter of orbit. 



6. Mouth broad, snout broadly rounded, mandibular angle of 90 or more. Fins 



less deeply incised ; the lower caudal lobe rounded ; pectoral and ventral 



margins nearly straight. GALEUS OALIFORNICUS, 3^. 



bb. Mouth narrow, snout long, acute, mandibular angle 60 to 65. Fins deeply 



incised; lower caudal lobe acute; pectoral and ventral margins concave. 



MUSTILUS LDNULATUS, 30. 



aa. Eye small, spiracle large, the latter to J the major diameter of orbit. Snout sharp, 



mouth narrow, the mandibular angle about 70. Terminal lobe of caudal broad, 



obliquely truncate posteriorly. Nostrils very large, their width nearly equaling 



width of interspace. Fins less incised. GALEUS DORSALIS, 32. 



3030 95 2745 



