22 ART. 2.— BASHF0ED DEAN. 



(Genus II) PARAIY1YXINE, nov.gen. 



Hyperotretes with branchial apertures ventrad of sacs. Ectal 

 branchial ducts of distinctly unequal length, the most anterior 

 several times the length of the most posterior. The duct of the 

 most anterior gill opening at the surface opposite the fourth (or 

 fifth) gill sac. Openings of branchial ducts drawn close together 

 and compressed transversely, that of the ductus œsophagœus, how- 

 ever, longitudinally, the latter aperture of large size, its length 

 equalling that of the sum of the interspaces of several gills. 

 Transverse constrictor muscles of the branchial region developed as 

 a distinct element in the region of the hindmost branchial sacs. 

 (Cf. Text-fig. 4, C). 

 (Species I) Atami sp. nov. 



Six gills. Ectal duct of the most anterior gill three or more 

 times the length of the most posterior. Base of tongue muscles 

 between third pair of branchial sacs. Dental formula ri I tt. 

 Three teeth, the most nearly median of each row, confluent at 

 bases. Length about 55 cm. Dark purplish : gill apertures white : 

 mucous pores conspicuous and dark colored. 



Eggs in type specimen 25 in number, each about 30 mm. by 

 8 : narrow, therefore, and long : blunt ends. In two similar eggs 

 taken separately on trawl line measurements are 30 by 7. No 

 opercular ring at vegetal pole. Filaments about 75 in number at 

 either pole, arising close together. The inner circle of filaments 

 :tl animal pole separated somewhat widely from micropyle. 



Habitat, Sea of Sagami, Japan. 

 (Genus IH) MYXINE Linné. 1754. Mus. Ad. Fiidr., I, p. 91. 



(Cf. esp. German, 1899, (Fishes collected by the Albatross pp. 

 342-350). 



Hyperotretes with but a pair (variation one and one half pairs) 



