CEPHALOPODS OF THE PHILIPPINE ISLANDS 131 



Measurements and indices of two females of Nototodams sloani 

 philippinensis Voss, 1962, are: 



In the specimen of 180.0 mm. ML, two types of arm suckers, differ- 

 entiated on the basis of their dentition, are present. The first type, 

 characterized by a single large median tooth on the outer or distal 

 margin which is long and sharp, often upturned, is found basally for 

 the first seven or eight pairs of suckers. On either side of the giant 

 median tooth are noticeably smaller teeth graduating downward in 

 size but continuing proximally entirely around the sucker ring in 

 those of pairs 4 to 8, the teeth amounting to about 20. The first few 

 pairs have smooth rings basally. The basal portion of the ring of the 

 first pairs is composed of broad shallow flat teeth; the teeth of the 

 last five or six pairs become broadly triangular but low. Beyond the 

 basal eight pairs the suckers are distinctly changed, the proximal 

 border flattened, entirely smooth. The distal border has six or seven 

 long slender teeth. The first few suckers have the median tooth 

 much larger than the others, but within two or three pairs they become 

 equal and continue so to the tip of the arms. In none of the series 

 are there any intermediate smaller teeth. 



In the smaller specimen there is not such a sharp distinction 

 between the two series, but at about the 9th pair the proximal border 

 becomes less rounded, the aperture somewhat semi-circular, and the 

 distal teeth even and six or seven in number. There is no indication 

 of an enlarged median sucker. 



The tentacles are short and stout, the stalk somewhat triangular 

 and keeled on its outer surface, and with an enlarged and broadened 

 club. The club is surrounded by a broad protective membrane with 

 supports. The sucker-bearing portion of the tentacle is about three- 

 fourths of the total length, the carpal section indistinct. There are 

 about 11 suckers differentiated by their dentition which may compose 



