BURGESS: FOUR NEW SPECIES OF SQUID ENOl'LOTKUTHIS 



the tentacular sheath to the tip of arm IV. The 

 third row extends anteriorly from the base of the 

 first nuchal fold but is interrupted by the 

 window of the eye, and subsequently divides. One 

 branch unites with the second row at a short dis- 

 tance from the base of the ventral arm. The other 

 branch continues laterally along the edge of the 

 tentacular sheath to the tip of arm IV. The fourth 

 row begins opposite the second nuchal fold and 

 proceeds to the posterior margin of the eye open- 

 ing and runs along the edge of the eyelid ventral- 

 ly to the optic sinus (Fig. 3G). The dorsal half of 

 the eyelid has no light organs. From the upper 

 edge of the optic sinus the fourth row continues 

 along the base of the swimming keel of arm III to 

 almost opposite the last arm hook. An additional 

 short arc-shaped row of very small white photo- 

 phores, set far apart, lies between the third and 

 fourth rows on the posteroventral eye region. 

 This short row is inconspicuous and can easily 

 escape detection. 



The light organs on the eyeball vary from 9 to 

 10. The large terminal photophores are sepa- 

 rated by a space from a series of eight or seven 

 adjacent round to oval smaller light organs (Fig. 

 3J) of varying dimensions. 



The radula has seven long, slender, slightly 

 curved teeth in each transverse row. The rachid- 

 ian tooth has pointed cusps, one on each side. The 

 lateralmost teeth are longest (Fig. 3H). 



The mandibles are strong and heavily pig- 

 mented. The rostrum of the upper mandible is 

 very pointed and the edges are sharp (Fig. 3Fi). 

 The lower mandible has three distinct ridges 

 (Fig. 3F 2 ). In a specimen ML 25 mm the wings of 

 both halves are transparent. 



The gladius is featherlike and the rachis is 

 thickened into a rounded ridge dorsally. The 

 vanes are fragile and narrow. The cone is thin 

 and narrow, but rounded posteriorly. The 

 thickened edge of the vanes described by Roper 

 (1966, fig. 14) in E. anapsis is only slightly indi- 

 cated here. 



There are no spermatophores in the largest 

 male paratype (ML 46 mm). The hectocotylus is 

 not fully developed; the lappet is only 1 mm wide 

 and there are no tubercles on the inner surface of 

 the arms. Numerous sperm reservoirs are 

 present in one of the females (ML 75 mm). These 

 are about 6 mm long and are attached in two 

 areas: on the inner wall of the mantle (opposite 

 the midpart of each funnel retractor muscle) and 

 in the concave inner wall of the retractor muscles 

 themselves. The same female is gravid; the 



diameter of an egg taken from the ovary is slight- 

 ly <1 mm. 



Young individuals: Immature specimens (ML 

 10-30 mm) have six to eight rows of light organs 

 on the mantle. These rows first appear as a series 

 of elongate patches of large photophores sepa- 

 rated by spaces which later develop smaller 

 photophores (Figs. 2Ca, b). At ML 10 mm, all 

 the arms have hooks. The club has two rows of 

 suckers ancf no hooks. Five of the suckers are set 

 apart proximally and presumably become 

 carpal suckers. At ML 15 mm there are three 

 hooks on the club; by ML 20 mm the club has 

 eight hooks. The tentacles of these immature 

 individuals are shorter than the mantle (TLI 

 5O.O-0S4-86.7). The light organs of the eye do 

 not develop simultaneously: some of the smaller 

 individuals have only seven or eight (the two 

 terminal photophores and five or six inner ones). 



Remarks: The most distinctive feature of this 

 species is the eight well-defined rows of photo- 

 phores, separated by wide spaces, on the mantle. 

 In some respects this species resembles E. leptura 

 in the shape of the fins and the structure of the 

 clubs and tentacles. However, the latter species 

 has only seven rows of photophores on the 

 mantle, one of which arises from either of the 

 most median pair of rows and does not reach the 

 mantle. This feature is also found in juveniles. 

 The arrangement of the photophores on the head 

 also differs. The third lateral row is unbranched 

 in E. leptura. 



Distribution: Central Pacific, equatorial wa- 

 ters. Based on sampling for the present collec- 

 tion, E. octolineata does not seem to occur in the 

 Hawaiian area. 



Enoploteuthh jonesi n. sp. 

 (Figs. 4, 2D, F; Table 3) 



Holotype: Male, ML 47 mm, TC-7, Stn. 12, off 

 Milolii, Hawaii, 16 August 1964, 9-13 m, USNM 

 729717. 



Paratopes: 1 male, ML 35 mm, CHG-89, Stn. 

 24, 14°55.1'S, 164°02'W, 10 February 1966, 90- 

 130 m, USNM 729699. 1 female, ML 82 mm, 

 TC-7, Stn. 12, off Milolii, Hawaii, 16 August 

 1964, 9-13 m, USNM 577608. 1 female, ML 40 

 mm. TC-32, Stn. 28, 20°58.6'N, 158°33.7'W, 25 

 July 1967, 92-122 m, USNM 729707. 



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