NOTES ON JAPANESE MYXINOIDS. O] 



men) : three more median teeth of outer row, two of inner row 

 confluent at bases: of these the median are the smaller elements. 

 Average length of specimens (2 male, 1 female) 71 cm. Color «lark 

 purplish. Gill apertures and mucous pores obscure. 



Eggs (in one specimen) 44 in number, averaging .'>.") mm. in 

 length : about 12 mm. in thickness. Operculum at one pole only : 

 filaments about 65 in number at animal, and 70 at vegetal pole' 

 Innermost filamental at animal pole somewhat widely removed from 

 the micropyle. Habitat, Sagami Sea, Japan. 



(4) Cirrhata Sch. 1801. (=Heterotrema forsten). 



Six (or seven) gills. External ducts slightly longer in anterior 

 gills than in posterior. Base of tongue between first pair of gills. 

 Dental formula -Hr | ttt variation (Ayers) { J -f to tt | fr. Average 

 size about 48 cm. Coloration and Eggs undescribed. 



Habitat, Coast of South Africa, and New Zealand. 



(5) Burgeri Girard. 1854. Pro. Acad. Nat. Sei. Phila., p. 199. 



Six (variation seven) gills. External ducts somewhat longer in 

 anterior gill than in posterior. Base of tongue between second (or 

 first) pair of gills. Dental formula I | 9 variation i j i to tV | I. 

 Largest (median) three teeth of outer row confluent at. bases, largest 

 two teeth of inner row also. Average size 41.5 cm. Light brownish 

 purple, unpigmented median dorsal band. 



Eggs average 18 in number, each about 22.4 x 8.6, averaging 

 90 filaments at animal, 80 at vegetal pole. Operculum not uncommon 

 at vegetal pole — in my material in 5 specimens out of 20 : in none, 

 however, is the opercular line sharply marked, altogether complete, 

 or situated at any distance from the marginal filaments. Inner- 

 most filaments at animal pole located close to the micropyle. 



Habitat, coast of Japan. 



