CEPHALOPODS OF THE PHILIPPINE ISLANDS 63 



species, and I have made direct comparison with the nuptial arm of 

 one of Sasald's specimens from the Japanese islands. I do not under- 

 stand Adam's reference (1954, p. 128) to Massy's description of the 

 hectocotylization of the specimen in the Indian Museum inasmuch as 

 she only makes a brief quote from Joubin's 1897 paper. 



Distribution. — Andaman Islands; Persian Gulf (both Goodrich). 

 Indonesia (Adam); Philippines! 



Family Idiosepiidae 



Idiosepius pygmaeus Steenstrup, 1881 



Figure 10,0-^ 



Idiosepius pygmaeus Steenstrup, 1881, p. 219. — Berry, 1921, p. 357; 1932, p. 46. — 

 Grimpe, 1931, p. 165-174. 



Material: 1 cf , ML 8.0 mm., 5 99, ML 11.8-14.0 mm., Jolo 

 Harbor, Feb. 7-8, 1908; electric light. 1 9, ML 13.5 mm., Man- 

 salay, Mindoro, June 3, 1908; electric light. 2 cf cf, ML 6.8-7.2 

 mm., 2 99, ML 7.1-7.4 mm., Busin Harbor, Burias Id., Apr. 22, 1908; 

 electric light. 1 9, ML 6.9 mm., Cebu, Mar. 18, 1909; electric 

 light. 25 crd", ML 5.0-7.18 mm., 56 99, from Masbate Bay, Masbate 

 Id., Apr. 20, 1908; electric light in anchorage. 6 d'cf , ML 6.2-8.0 

 mm., 3 99, ML 10.0-12.0 mm., Nato River, Lagonoy Gulf, east coast 

 of Luzon, June 18, 1909; electric light. 2 cf cT, ML 12.0-12.0 mm., 

 3 99, ML 14.0-15.0 mm., Macabalan Point, Mmdanao, Aug. 4, 1909. 

 1 d", ML 9.0 mm., 1 9, ML 9.0 mm., Panabutan Bay, Mindoro, 

 Feb. 5, 1909; electric light. 1 9, ML 6.0 mm., San Pascual, in tide 

 pool, Mar. 8, 1909. 1 9, ML 13.0 mm., Atulayan Bay, Luzon, 

 June 17, 1909; beach seine. 



Description. — The numerous specimens obtained by the Albatross 

 permit a detailed description of this species and some considerations 

 of the range of variation in some of the important characters. 



The mantle is elongate oval, widest about in the middle and bluntly 

 pointed posteriorly. The dorsal margin is nearly straight, sometimes 

 slightly indented in the midline. The ventral margin is shallowly 

 excavated. On the dorsal surface beginning at the midpoint and 

 extending posteriorly to between the fins is a prominent oval rugose 

 area which is an adhering organ utilized by the squid to attach to the 

 underside of sea weeds and grasses. The mantle is free, articulating 

 at the neck and on each side of the funnel by the usual cartilaginous 

 processes. The posterior end is turned strongly downward. 



The fins are small, separate, and are attached at an angle to the 

 body by means of narrow bases. The individual fins are elongate 

 oval, the long axis paralleling the body, with free anterior and posterior 



