71 



The integument is thin. The body has a low dorsal keel forming 

 small denticles on somites III-VII of the pereon, somites of the pleon, 

 and somite I of the urosoma. The small high head has a small rostrum. 

 The eyes are small, without crystalline prisms. 



Antennae I are much shorter than the first two somites of the pereon; 

 the proximal segment of the flagellum is relatively narrow with an 

 extended posterior and bulging (particularly in the distal part) anterior 

 margin; the 1st and 2nd distal segments are small with almost parallel 

 margins; their length is more than their width; the elongated 3rd segment 

 has a stout apical seta, almost equal in length to the three distal segments 

 together. Antennae II are much (more than twice) longer than antennae I. 



The mandibles have a relatively narrow slanted cutting edge, a trian- 

 gular accessory plate and a very long palp, more than twice longer than 

 the mandibular body. Maxillae I have broad inner lobes. Maxillae II have 

 narrow lobes that are equal in width. 



Pereopods I are stout, with a slightly broadened 2nd segment; the 5th 

 segment is highly broadened distally, its length just slightly more than its 

 width; the 6th segment is oval, with bulging anterior and posterior margins, 

 sometimes almost hemispherical, with maximum width at its base or in the 

 proximal third; the length and width proportions are variable and decrease 

 as the animal ages; the claw is straight. The 5th segment of pereopods II is 

 weakly broadened distally, usually equal to the 6th but may be somewhat 

 shorter or longer; these segments together are roughly equal to the 2nd 

 in length. Pereopods III and IV are nearly equal in length and similar* 

 in structure; their 2nd segment has parallel margins or slightly broadens 

 distally; the 4th segment is somewhat longer than the 5th, which in turn 

 is shorter than or equal to the thin 6th segment; the claws are long, almost 

 straight. Pereopods V are longer than IV; their 2nd segment is longer than 

 62 the 4th, which in turn is longer than the 5th, and the latter longer than the 

 6th segment. Pereopods VI are longer than V; their 4th segment is slightly 

 shorter than the 2nd, but appreciably (nearly 1 .3 times) longer than the 

 5th segment; the 6th segment is also longer than the 5th but shorter than 

 the 4th. Perepods V and VI are longer than the pereon. Pereopods VII are 

 appreciably shorter than VI; their 4th segment is equal to the 6th, longer 

 than the 5th but shorter than the 2nd segment. The claws on pereopods 

 V-VII are thin, curved, and retractile. 



The uropods have narrowly lanceolate rami. The telson is triangular 

 (sometimes helmet-shaped), usually (but not always!) with an acute tip; 

 its length is 1/2, rarely 1/3, the length of the basipodite of uropods III. 



Notes: It was earlier suggested (Vinogradov, 1957, 1962) that 

 L. loveni Bovallius and L. aestiva Stebbing are identical and attention 



Changed from Russian text by authors — ^Eds. 



