58 



description and illustrations do not permit reliable identification. Lance- 

 ola ^errafa Bovallius is possibly a synonym of L. australis Stebbing and 

 L. suhmi Stebbing, while L. felina Bovallius is a synonym of L. murrayi 

 Norman. 



In the contemporary understanding, the genus Lanceola includes 12 

 species. 



KEY TO SPECIES OF GENUS LANCEOLA* 



1 . Telson nearly equal in length to basipodite of uropods III, sometimes 

 slightly shorter or longer; tip of telson usually blunt 7. 



51 — Telson appreciably (1/2-5/6) shorter than basipodite of uropods III; 

 tip of telson usually acute 2. 



2. Spoon-shaped formation on distal end of 6th article of 

 pereopods V-VII well developed; claws fully retractile 3 



— Spoon-shaped formation on distal end of 6th article of pereopods V 

 and VII almost not developed; only proximal part of claw retractile . . 

 5. L. falsa Vinogr. 



3. Somite VII of pereon and somites of pleon with somewhat developed, 

 at times very small, dorsal denticles. Pereopods VI equal to or longer 

 than pereon, much longer than pereopods IV 6. L. loveni Bov. 



— All somites of pereon and pleon without dorsal denticles. 

 Pereopods VI shorter than pereon and nearly equal to pereopods IV 

 in length 4. 



4. Pereopods III and IV simple, their 5th articles with parallel anterior 

 and posterior margins, 6th article almost straight 5. 



— Perepods III and IV with well-developed subchela formed by amyg- 

 daloid 5th and curved rod-shaped 6th articles 



12. L. chelifera Vinogr. 



5. Pereopods V simple with fully retractile claws and rod-shaped 6th 

 article. Pereon of female not spherically bulging 6. 



— Pereopods V with poorly developed subchela formed by narrow 

 amygdaloid 6th article and partially retractile claws. Pereon of 

 females spherically bulging 11 . bit L. sphaerica Vinogr. 



6. Antennae II with rod-shaped 4th segment in peduncle. Claws of pere- 

 opods 111,1/5-1/4 length of 6th segment 9. L. clausi Bov. 



— Antennae 11 with flat and broadened 4th segment in peduncle. Claws 



of perepods III exceptionally long, 2/3 length of 6th article 



10. L. longidactyla Vinogr. 



7. Dorsal denticles on pereon somites VI and VII, on all somites of 

 pleon, and somite I of urosome large and conspicuous. Pereopods I 



Key changed from Russian text by author — ^Eds. 



