FISHERY BULLETIN: VOL. 80, NO. 4 



the eye region between the median and lateral- 

 most rows. 



Nine light organs occur in a single row on the 

 ventral side of the eyeball (Fig. 1L). The termi- 

 nal photophores are larger and are separated by 

 a wide space from a row of seven much smaller 

 ones that lie adjacent to one another. 



The teeth of the radula are long and slender 

 (Fig. II); the rachidian has distinct cusps on each 

 side. The first lateral teeth are the shortest. 



The mandibles of a young male (ML 40 mm) 

 have distinct growth lines on the wings. The 

 rostrum is heavily pigmented; the edges are 

 sharp and the tip of the upper mandible is very 

 pointed (Fig. Id). The gular plate of the lower 

 mandible is strengthened by three stout ribs 

 (Fig. 1G 2 ). 



The gladius has a strong rachis which is 

 rounded anteriorly and thickened medially. The 

 thin vanes are widest at about the midpoint of 

 the total length. The rounded posterior cone is 

 shallow and thin. 



A single spermatophore was found in the 

 spermatophoric sac of the holotype (ML 55 mm), 

 and its measurements are given below: 



Spermatophore segment 



Entire spermatophore 

 Spiral filament 

 Cement body 

 Sperm reservoir 



Length (mm) 



11.5 

 4.5 

 1.5 

 5.5 



The spiral filament is slightly sculptured at 

 the aboral end by some irregular ridges. The 

 cement body has a small collar at the oral end 

 (Fig. 1M). A few spiral turns are visible behind 

 the spermatophore cap. 



of an Alepisaurus) exhibits certain features not 

 observed in other specimens of the same or near- 

 ly the same size. The arm and tentacular hooks 

 have flattened processes (Fig. 1H). Further- 

 more, this specimen shows a slight variation in 

 the arrangement of photophores: some photo- 

 phores occur on the median space of the mantle. 



The closest species to E. obliqua is E. leptura 

 (Leach 1817) from the Atlantic. Both obliqua and 

 leptura have slender tentacles and clubs. There 

 are few suckers (<20) arranged in two rows on 

 their clubs. However, obliqua has fewer tentacu- 

 lar hooks (at most 9) while leptura has more (6- 

 12). The carpal cluster is elongate and without 

 prominent ridges in both species. Their sperma- 

 tophores show similar characteristics: very little 

 sculpture in the spiral filament and one small 

 collar on the cement body. 



The specific name obliqua reflects the arrange- 

 ment of the mantle photophores. The oblique ar- 

 rangement of light organs on the mantle was de- 

 scribed earlier by Okutani (1974). His three im- 

 mature specimens (ML 23.8-25.8 mm) from the 

 EASTROPAC collection and a fourth specimen 

 from the invertebrate collection of the Scripps In- 

 stitution of Oceanography are all referable to E. 

 obliqua, His material was collected in the eastern 

 Pacific. 



Distribution: Equatorial regions of the central 

 and eastern Pacific. 



Enoploteuthh octolineata n. sp. 

 (Figs. 3, 2C; Table 2) 



Holotype: Female, ML 71 mm, HMS-47, Stn. 

 58, 02°56'N, 150°03'W, 4 November 1958, 212 

 m, USNM 577607. 



Young individuals: Small specimens (ML 6.0- 

 20.0 mm) are easily separated from other species 

 of Enoploteuthis by the unique oblique rows of 

 photophores on the mantle. Early development 

 of the oblique rows are shown in Figure 2Aa and 

 b in specimens ML 7 and 9 mm, respectively. 

 Arm hooks are formed early; six to nine hooks 

 are already present in the arms at ML 6.0 mm. 

 But tentacular hooks appear much later; a ML 17 

 mm specimen has one tentacular hook and an- 

 other (ML 20 mm) has none at all. Only two rows 

 of suckers are present on the club. 



Remarks: A female specimen tentatively as- 

 signed to this species (from the stomach contents 



Paratypes: 1 female, ML 75 mm, TC-43, Stn. 

 52, 00°01'N, 145°03'W, 28 May 1969, 50 m, 

 USNM 729721. 1 female, ML 56 mm, TC-46, 

 Stn. 37, 03°23'N, 145°04'W, 26 October 1969, 

 50 m, USNM 729720. 1 male, ML 46 mm, TC- 

 48, Stn. 50, 03°29'N, 144°58'W, 17-18 April 

 1970, 50 m, USNM 729708. 



Other material: 1 specimen, ML 10 mm, HMS- 

 47, Stn. 51, 00°44'S, 149°46'W, 2 November 

 1958, 576 m. 1 specimen, ML 25 mm, HMS-47, 

 Stn. 58, 02°56'N, 150°03'W, 4 November 1958, 

 212 m. 1 specimen, ML 15 mm, CHG-89, Stn. 5, 

 02°40'N, 157°31'W, 28 July 1966, 120-240 m. 

 1 specimen, ML 15 mm, TC-43, Stn. 12, 12°11'N, 



708 



