59 



with distally highly broadened 5th segment forming upper and lower 

 lobes; 6th segment simple, comparatively narrow, its base occupying 

 only half distal margin of 5th segment 7. L. serrata Bov. 



— Somites VI and VII of pereon and all somites of pleon lacking large 

 dorsal denticles 8.* 



8. Pereopods V with rod-shaped 4th segment. Somite I of pleon without 

 dorsal depression 9. 



— Fourth segment of pereopods V broadened, elongated-oval. Somite I 

 of pleon with dorsal depression 8. L. laticarpa Vinogr. 



9. Head with distinct straight or hook-shaped rostrum 10. 



— Rostrum absent 4. L. pacifica Stebb. 



10. Distal segments of antennae I not fused. Pereopods VI equal to or 

 shorter than pereon 11. 



— Distal segments of antennae I fused (Fig. 6). Pereopods VI longer 

 than pereon 1 . L. sayana Bov. 



1 1 . Fourth segment of peduncle of antennae II not forming distal lobe. 



52 Pereopods VI nearly same length as pereon. Apical segment of flag- 

 ellum of antennae I discoid and longer than two preceding segments 

 (Fig. 6.) 3. L. felina Bov. 



— Fourth segment of peduncle of antennae II forms conspicuous distal 

 lobe. Pereopods VI equal in length to somites I-IV of pereon. Apical 

 segment of antennae I not discoid and nearly equal to two preceding 

 segments (Fig. 6) 2. L. intermedia Vinogr. 



1. Lanceola sayana Bovallius, 1885 (Figs. 5, 6) 



Bovallius, 1885b: 7, 1887b: 30; Woltereck, 1909: 158 (var. typica + 

 var. longipes); Stephensen, 1918: 8; Vinogradov, 1957: 190; 1960a: 200; 

 1964: 109.— pelagica (?) Say, 1818: 318; Shoemaker, 1945a: 206. 



Length of a sexually mature individuals varies from 19 to 42 mm. 



The color of unfixed specimens is fairly variable: they are dark red, 

 orange or colorless; sometimes the anterior half of the body, i.e. head and 



53 part of the pereon, is colored while the posterior part of the pereon, pleon 

 and urosome is colorless; at times the reverse is seen, i.e., the pereon 

 is colorless while the pleon, mouthparts, and pereopods are orange or 

 carmine-red. 



The integument is dense; the dorsal side of the pereon and pleon has 

 a blunt, poorly developed keel; the surface of the somites is covered with 

 sculptured thickenings, at times very weakly developed. The pereon of the 

 female bulges to some extent or, in any case, is dilated. Males well pro- 

 portioned, the pereon differing little from the pleon in width.The head has 

 an acute triangular rostrum, sometimes straight and longer but often short 

 and curved beaklike. The eyes are conspicuous, with crystalline cones. 



Number missing in the Russian original — translator. 



