3io 



BULLETIN OF THE BUREAU OP FISHERIES. 



Measurements of Sepioteuthis arctipinnis. 



Type locality. — Island of Maui (Gould). 



Distribution. — Honolulu, Oahu (Albatross, Jenkins, et al.); Maui (Gould); Eertrand Id., north coast 

 of Papua ? (Wiilker). 



Specimens op Sepioteuthis arctipinnis Examined. 



Remarks. — The large male from Honolulu, which is the subject of the major portion of the pre- 

 ceding paragraphs, shows certain differences from the description of Gould. Its fins are proportion- 

 ately wider (the two taken together considerably more than equaling the body in width at their widest 

 point), and the ventral arms are longer, considerably exceeding the head in length. These divergencies 

 do not seem important, however, and on the whole the specimens indicate that 5. arctipinnis is probably 

 to be regarded as a good species, even though not a very strongly differentiated one. 



As compared with male specimens of a near ally, S. lessoniana Ferussac, from Wakanoura, Japan, 

 the following differences are presented: The animal is smaller, the body a little more slender, more 

 regularly tapering, and the posterior extremity somewhat more acute. The fins do not extend quite so 

 far forward, they do not possess so symmetrically curving an outline, and the point of their widest 

 expansion is at the posterior third instead of at near the middle . The "olfactory crest ' ' is less developed 

 and its lobes angled rather than rounded. The minutiae of the hectocotylized arm are slightly different, 

 although this may be due to the method of preservation. Lastly, the suckers of the sessile arms have 

 a decidely fewer number of teeth on their horny rings ; the variance between the horny rings of the ten- 

 tacular suckers is very slight but in the same direction. The marginal thickenings of the gladius are 

 also worthy of note, but these have already been called to attention by Tryon. On the whole the 

 relationship between the species is exceedingly close, but so far as my material goes the two may be 

 readily separated by means of the characters noted. 



This is another important edible form. 



Genus LOLIGO Schneider 1784. 



Loligo Schneider 1784, p. no. 



Lotigo Lamarck 1798 (fide Hoy le); 1799. p. 11 {fide Jatta). 



Lotigo Verriil 1S81, p. 307. 



Body elongate, tapering posteriorly. Fins terminal; rhomboidal in the young, in the adult more 

 or less sagittate. 



