Species of Brachiostoma. 



B. cultellum 

 B. caribaeum 



B. lanceolatum 



B. cingalense 

 B. nakagawae 



B. belcheri 



B. lucayanum 

 B. pelagicum 

 B. californiense 

 B. bassanum 

 B. capeiise. 

 B. elongatum 



113 



No, of Myotome*. 

 32 + 11 + 10 = 53 



35 + 14+ 9 = 5^ 



36+14+12=6^ 



39+17+ 6 = 62 

 37+ 16+ 1 1 =64 



37 + 14+13 = 64 



44+ 9+13=66 

 36+16+15=67 

 44+16+ 9 = 69 

 44+13+18=75 

 47 + 19+ 9=75 

 49+i8+i2r=79 



Distribution. 



N. Australia. 

 E. Australia. 

 S. America. 

 S. United States, 

 Antilles. 

 Europe. 



Chesapeake Bay- 

 Ceylon. 

 Japan. 

 Borneo, 

 N. Australia. 

 Bahamas. 

 Honolulu. 

 California. 

 S. Australia. 

 S. Africa. 

 Peru. 



It would appear from this table that the African form some- 

 what resembles B. bassanum, Giinth,, both from the similarity 

 of the number of myotomes (75 in all in both cases) and 

 geographical position, the most distinctive difference being 

 in the number of myotomes of the caudal region. 



[Published 7TH October, 1902. J 



