536 Myxinoids of the Genus Heptatretus or BJellostomn. 



6. Heptatretus cirratus. 



Petromyzon cirrhatus, Schneid. Blocli's Svst. Ichth. p. 532 (1801). 



Bdellostomaforsteri, Miill. Abbandl. Akad. Berlin, 1834, p. 80. 

 JJdellosfoma cirrhatum (part.), Giinth. Cat, Fish. viii. p. 511 (1870). 

 Eptatretiis cirrhatus, "\Vaite, Kec. Canterbury Mus. i. 1909, no. 2, p. 2, 

 pi. xiii. 



7 gill-openlngs ; on each side two rows of 12 teeth, the 3 

 anterior teeth of each row united at the base; lengtli of 

 head, to first gill-opening, about 3| in the total length. 



New Zealand. 



1. 530 mm. D'Urville Is., Queen Charlotte Sound. 'Challenger.' 



2. 400 mm. New Zealand. Capt. Stokes. 



7. Heptatretus hanhsii. 



Homea banksii, Fleming, Philos. of Zool. ii. p. 375 (1822). 

 Bdellostoma heptatrema, Miill. Abbandl. Akad. Berlin, 1834, p. 79. 



7 gill-openings; on each side two rows of 8 teeth. 

 Southern Pacific. 



8. Heptatretus hexatrema. 



Bdellostoma hexatrema, Miill. Abbandl. Akad. Berlin, 1834^ p. 79. 



Bdellostoma heterotrema, Miill. /. c. 



Bdellostoma cirrhatum (part.), Guntb. Cat. Fi.sb. viii. p. 511 (1870). 



6 gill-openings ; on each side 12 teeth in the outer row 

 and 11 or 12 in the inner; 3 anterior teeth of outer and 2 

 anterior teeth of inner rows united basally ; length of head, 

 to first gill-opening, 3|- to 3| in the to'al length. 



South Africa. 



1. 700 mm. Simon's Bav. ' Cliallenger.' 



2. 550 mm. Table Bnv." J. L. Statban, Esq. 



3. 430 mm. FiUse Bay. Dr. J. I). F. Gilchrist. 



4. 230 mm. ' Dr. Giintber. 



9, Heptatretus huergeri. 



Heptatrema cirrhatum (non Schneid.), Schlog. Faun. Japon., Poiss. 



p. :U0, pi. cxliii. (1850). 

 Bdellusijtna burc/eri, Girard, Proc. Ac. Pbilad. 1S54, p. 199. 

 Homea burg eri. Dean, Journ. Coll. Tokyo, xix. 1904, Art. 2, p. 11, 



fig. C, and p. 21. 



6 gill-openings; on each side 9 teeth in the outer and 9 or 

 10 in the iniier row : 3 anterior teeth of outer and 2 anterior 

 teeth of inner row united basally; length of head, to first 

 gill opening, 3| in the total length. 



1. 380 mm. Yokohama Bay. Prof. D'Arcy Thompson. 



