180 HAWAIIAN AND OTHER PACIFIC ECHINI. 



tross collection ranges in length from 10 to 64 mm. The largest is rather 

 wider than long and is only 31 mm. high. There is considerable individual 

 diversity not only in the shape of the test but in the length and width of the 

 petals, especially the posterior pair. As a rule the specific characters are well 

 shown, but there is undoubtedly a tendency to intergrade with latifrons, and 

 possibly hybridization with that species occurs. The following list of stations 

 extends the known range of the species far to the north, as it was previously 

 recorded only from southern California to the Galapagos Islands. 



Station 2890. Off Oregon. Bott, temp. 42.2°. 277 fms. Gy. s. 



Station 2891. Off southern California. Bott. temp. 45.1°. 233 fms. M. 



Station 2892. Off southern California. Bott. temp. 44.1°. 284 fms. 

 Yl. m. 



Station 2909. Off southern California. Bott. temp. 45.2°. 205 fms. 

 Gn. m. 



Station 2925. Off southern California. Bott. temp. 42.9°. 339 fms. M. 



Station 2980. Off southern California. Bott. temp. 38.9°. 603 fms. 

 Gn. m. 



Station 3073. Off Washington. Bott. temp. 49.2°. 477 fms. Gn. m. 



Station 3076. Off Washington. Bott. temp. 43.4°. 178 fms. Gn. m. 



Station 3077. Off southeastern Alaska. Bott, temp. 42.4°. 322 fms. 

 Gn. m., g. 



Bathymetrical range, 68-603 fms. Extremes of temperature, 49.2°-38.9°. 



Two hundred and thirty-two specimens. 



Brisaster latifrons. 



Schizaster latifrons A. Agassiz, 1898. Bull. M. C. Z., 32, p. 81. 



Schizaster (Brisaster) latifrons Mortensen, 1907. Ingolf Ech., pt. 2, p. 123. 



This is another Panamic species whose range is enormously extended by 

 the large series in the Albatross collection. And it must be added that the 

 specimens from Japan, recorded in the Challenger Report as Schi:<ist<r irntn- 

 cosus Gray seem to be identical with this wide-ranging form. Mr. Agas>iz's 

 original material of latifrons was scanty and the specimen on which the species 

 was based was only 17 mm. long. But the more abundant materia] which has 

 since been collected shows that the supposedly specific characters are in pari 

 at Least due t'> immaturity, so that while the speries is probably valid the name 

 latifrons is not particularly appropriate except to young specimens. Some of 





