62 U.S. NATIONAL MUSEUM BULLETIN 2 34 



mal pocket. The inward-turning margin becomes a low ridge ter- 

 minating in the middle of the excavation in a mound which bears 

 a raised internal lobe cleft in the proximal border. From the outer 

 or ventral side of the cleft, the margin turns outward to become the 

 outer distal edge of the main excavation and forms an excavation 

 again containing a deep anterior pocket. Proximal of the excava- 

 tion there are two or three small suckers, the third one when present 

 placed on the ventral margin. Distad of the excavation are eight 

 pairs of suckers similar in size and arrangement to those of the nor- 

 mal right dorsal arm, that is, those of the ventral row enlarged. 



The tentacles are long and slender, flattened on the oral surface, 

 and bear clubs which are somewhat expanded. Ventrally the club 

 has a low protective membrane, but dorsally there is a wide web 

 originating basal to the club and extending to the tip. The suckers 

 are small, toothed on the margin, and in about 8 to 10 rows. 



There appears to be no gladius. 



The color in preserved specimens is yellowish with numerous 

 purplish-brown chromatophores which are minute to large, crowded 

 on the dorsum of the head, arms, and mantle, scattered ventrally. 

 On the arms, the chromatophores provide a banded effect as they do 

 on the aboral distal half of the tentacles, Chromatophores extend 

 over most of the dorsal surface of the fins but are absent on their 

 ventral surface. 



There are no Hght organs in the mantle cavity or elsewhere. 



Measurements and indices of 10 specimens of Inioteuthis maculosa 

 Goodrich are: 



cj'cfcfd'c?? 9 9 9 9 



ML 11.2 11.5 11.2 11.7 12.0 12.6 12.0 12.5 11.8 10.0 



MWI 84.7 82.5 71.5 77.0 79.0 71.4 71.6 72.0 80.5 80.0 



HWI 73.2 76.5 71.5 75.0 72.5 75.3 75.0 73.5 76.2 80.0 



FLI 46.3 49.1 51.8 45.3 50.0 47.6 62.5 52.0 46.5 55.0 



FWI 126.0 133.0 134.0 124.0 125.0 126.6 133.0 132.0 135.0 130.0 



I 71.5 78.0 76.8 72.6 71.0 55.6 54.0 48.0 69.3 60.0 



II 80.3 87.0 80.3 87.0 83.4 72.2 66.6 64.0 67.8 76.0 



III 84.7 87.0 80.3 — . 19.7 64.2 63.3 64.0 63.5 60.0 



IV 71.5 82.5 75.8 64.1 75.0 55.5 58.3 52.0 59.2 60.0 



TLI 80.3 78.2 135.0 150.0 176.0 102.0 130.0 



CLI 



Sis 6.7 6.6 6.2 7.7 7.1 3.8 3.7 3.2 3.3 4.5 



NCI 37.5 39.2 35.7 35.8 37.6 35.6 41.7 40.0 46.6 45.0 



Type. — Indian Museum, Calcutta. 



Type locality. — Andaman Ids. (specimen first mentioned). 



Discussion. — This small species is closely related to Inioteuthis 

 japonica Verrill which it resembles in most particulars except for 

 the details of the hectocotylized left dorsal arm. The details of 

 this arm, described above, leave no doubt as to the validity of the 



