BURGESS: FOUR NEW SPECIES OF SQUID ENOPLOTEITIUS 



August 1967, 8-25 m. 1 male, ML 46 mm, TC- 

 32, Stn. 41, 20°58.9'N, 158°29.1'W, 16 August 

 1967, 59-122 m. 1 female, ML 37 mm, TC-32, 

 Stn. 44, 21°00.1'N, 158°29.1'W, 18 August 

 1967, 72-118 m. 1 female, ML 47 mm, TC-32, 

 Stn. 45, 20°58.1'N, 158°28.7'W, 18 August 

 1967, 12-31 m. 2 specimens, ML 27 and 28 mm, 

 TC-32, Stn. 46, 20°57.6'N, 158°28.7'W, 18 

 August 1967, 77-118 m. 1 female, ML 35 mm, 

 TC-32, Stn. 48, 20°59.7'N, 158°27.7'W, 19 

 August 1967, 60-104 m. 1 female, ML 29 mm, 

 TC-32, Stn. 56, 21°22.4'N, 158°14.6'W, 23 

 August 1967, 97-179 m. 



Description: The muscular mantle is slender 

 (MWI 31.1-37.S-44.8) and conical; the translu- 

 cent tail is slender and ends bluntly. The ventral 

 anterior edge of the mantle is not deeply ex- 

 cavated and the lateral angles are pointed, but 

 low. The dorsal anterior lobe is low. 



The fins are triangular, wide (FWI 15.6-81.2- 

 85.7), and long (FLI 65.2-704-75.6). The anterior 

 margin near its attachment is a rounded lobe, 

 but more laterally it appears straight. The 

 lateral angles (about 75°) are rounded at the tip. 

 The slightly concave posterior margins join the 

 mantle independently, but the union of both fins 

 (close to the tip of the mantle) is indistinct. 



The funnel is triangular and wide at the base. 

 The funnel valve is a wide semicircular flap. The 

 funnel organ is large; an anterior papilla and 

 thick lateral ridges are present. The funnel- 

 mantle locking cartilage is simple with a shallow 

 groove. The anterior part of the cartilage is 

 slightly narrower than the posterior end. 



The head is as wide as the mantle (H WI 28.3- 

 34.0-40.5). The eye opening is a wide oval with a 

 deep anterior sinus. The funnel groove is 

 moderately deep and the lateral sides continue 

 posteriorly as sharp ridges. The ventral ocular 

 "windows" are translucent. The three nuchal 

 folds are very prominent. The tongue-shaped 

 olfactory organ is attached to the first fold closest 

 to the funnel. The second and third folds are 

 united to each other posteriorly and the third fold 

 on each side continues as a much reduced fold 

 toward the dorsal midline. 



The buccal membrane has a DDVD attach- 

 ment to the arms. Numerous folds and broad 

 tonguelike papillae occur on the inner surface of 

 the membrane. The external surface is densely 

 supplied with small purplish chromatophores so 

 that it is darker than most parts of the body. 



The arms are slender but muscular, nearly 



square in cross section at the base and finely 

 pointed at their tips. The arms are moderate in 

 length (ALI: I, 44.8-5.4.3-60.4; II, 51.7-53.0-67.9; 

 III, 51.7-53.5-62.3; IV, 58.6-65.5-73.3). Arm IV is 

 longest in both sexes. The swimming keels are 

 developed to about one-half of arm I distally, two- 

 thirds of arm II distally, and complete in arm III 

 where they are as wide as the arm at the mid- 

 section. The lateral membrane (tentacular 

 sheath) of arm IV is wide and reaches to the tip of 

 the arm. Dorsal and ventral protective mem- 

 branes are developed on all the arms of both 

 sexes. They are widest on arm III and least 

 developed on arm IV, except on the hectocotyl- 

 ized arm of the male. 



The right ventral arm of the male is hectocotyl- 

 ized. The protective membranes of this arm are 

 modified. At about the middle half of the arm 

 opposite the sixth pair of hooks, the ventral pro- 

 tective membrane becomes enlarged into a wide 

 undulating flap that is reduced abruptly about 

 three-fourths of the arm length and continues 

 distally to the tip of the arm as a much narrower 

 membrane. The dorsal protective membrane, on 

 the contrary, is only slightly modified. A short 

 semilunar flap is present opposite the distal end 

 of the larger ventral flap (Fig. 5F). Numerous 

 conical papillae are scattered on the oral surface 

 of the arms of males between the bases of the 

 hooks and on the bases of the arms. 



The arms have biserial hooks proximally and 

 biserial suckers distally. The hooks (Fig. 5E) are 

 strongly attached and completely enclosed by 

 sheaths. About half of the suckers at the tips of 

 the arms have long stalks and wide openings. 

 The distal half of the inner rim of the sucker has 

 seven to eight teeth; the two middle teeth are 

 narrower than the lateral teeth; a shelf is visible 

 on the proximal half (Fig. 5B). The outer ring 

 bears numerous pegs. The remaining suckers 

 gradually become smaller distally, assuming a 

 globular shape with smaller openings that lack 

 teeth and outer rings. 



The robust tentacles are much longer than the 

 mantle (TLI 1 1 0. 8- i £0.3-239.1). The stalk near 

 the base is almost square in cross section and as 

 stout as arm III. The carpus and manus of the 

 club are wide but the dactylus is quite narrow 

 (Fig. 5G). The carpal cluster is compact and it 

 includes three smooth-ringed suckers (very 

 rarely two suckers) and several rounded pads 

 and some elongate ridges and grooves; these are 

 arranged in an oval cluster. Ten to 12 very 

 robust, sheathed hooks are present in two rows 



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