57 



maxillae I reduced and nearly half length of outer lobe 



4. Metalanceola Pirl. 



4. Eyes modified into reflector organs, resembling two large cup-shaped 

 depressions on both sides of head 2. Scypholanceola Wolt. 



— Eyes reniform or round, on small prominence on sides of head, some- 

 times very weakly developed 1 . Lanceola Say. 



1. Genus Lanceola Say, 1818 



Say, 1818: 318; Bovallius, 1887b; 28; Bowman and Gruner, 1973: 20. 



Animals large or medium in size. The integument is thin, trans- 

 parent or compact, even faceted. The eyes are small and reniform, at 

 times inconspicuous. In antennae I the conical proximal segment of the 

 flagellum is more or less pubescent* sometimes curved; the size and 

 shape of the three small distal segments are important in species diag- 

 nosis. Antennae II are longer than or equal to antennae I. Sexual dimor- 

 phism in the structure of the antennae is not pronounced. The 3rd seg- 

 ment of the mandibular palp is shorter than the 2nd segment. The inner 

 lobes of maxillae I are large and broad. The maxillipeds have large, 

 highly armed outer lobes and small separate inner lobes. The 5th seg- 

 ment of pereopods I and II is enlarged but the 6th segment narrows 

 distally. Pereopods III-VII are long, their segments rod-shaped. Pere- 

 opods V-VII have a somewhat developed spoon-shaped depression and 

 retractile claws. The gills are located on somites II-VI. 



Type species: Lanceola pelagica Say, 1818. 



For most of the species of the genus Lanceola, represented in 

 large numbers in the material examined by us, variability of many 

 features, such as body shape, thickness of integument, relative length of 

 appendages, shape and relative length of the segments of the pereopods, 

 length and shape of the telson, etc., is characteristic. Some of these 

 features vary markedly while others vary less. Variability is associated 

 not only with the age and sex of the animal, but with some extraneous 

 factors, in particular, possibly with the habits of the host, according to 

 Woltereck. 



Various authors have described nearly twenty species of this genus. 

 Some have been transferred to other genera while others have been 

 considered synonyms. However, there are some doubtful species that 

 might possibly be synonyms but the brevity of the original descriptions, 

 schematic and impressionistic illustrations do not permit confirmation of 

 this with certitude. Thus L. sayana Bovallius and L. pelagica Say are 

 possibly synonyms; the latter species has the right of priority but its 



Changed from Russian text by authors — ^Eds. 



