79 



forms a recurved roundish lobe that reaches the distal margin of the 

 1st segment of the peduncle; its anterior margin is highly pubescent. 

 The distal segments of the flagellum are relatively better developed and 

 cylindrical; the 3rd segment is usually longer than the preceding two 

 taken together. Antennae II are relatively short, only slightly longer than 

 antennae I. 



The mandibles have a broad cutting edge and an accessory plate 

 reduced to a spine; the palp is thin, weakly armed, and slightly longer than 

 the mandibular body. Maxillae I have a developed palp and a broad inner 

 lobe. Maxillae II have narrow, uniformly broad lobes. The maxillipeds 

 have well-developed outer lobes armed with strong setae, and small inner 

 lobes. 



The shape and length ratio of the appendages are fairly variable. 

 Pereopods I and II differ little in length; their 2nd segment is broadened 

 (sometimes very strongly, especially in pereopods I); the 5th segment of 

 pereopods I is broadened distally such that its maximum width roughly 

 equals its length; the broad base of the short conical 6th segment occupies 

 a large part of the distal margin of the 5th segment; the claw is nearly 

 straight. The 5th and 6th segments of pereopods II are longer than in 

 pereopods I; the 5th segment is appreciably broadened distally; the claw 

 is nearly straight. Pereopods III and IV are strong, identical in length 

 and structure, their broad 2nd segment somewhat shorter than the 4th 

 and 5th segments together or equal to them; the 4th segment is shorter 

 (sometimes appreciably) than the 5th, which in turn is shorter than the 6th. 

 Pereopods V are shorter than the pereon and also shorter and weaker than 

 pereopods IV; the 2nd segment is shorter than the 4th and 5th together; 

 the 4th, 5th, and 6th segments are equal in length or the 6th may be 

 slightly longer and the 4th shorter than the 5th. Pereopods VI are longer 

 and somewhat stronger than pereopods V; the 2nd segment is shorter than 

 the 4th and 5th together; the 4th segment is somewhat shorter than or 

 equal to the 5th; the 6th is longer than the 5th. Pereopods VII are much 

 shorter and weaker than pereopods V; the 2nd segment is longer than the 

 equally long 4th and 5th segments together; the 6th segment is longer than 

 the 5th. The retractile claws of pereopods V-VII are small and curved. 



Uropods I have narrowly lanceolate and uropods III broadly 

 lanceolate rami. The triangular telson reaches 1/2-2/3 the length of the 

 basipodite of uropods III but does not reach the distal margin of the 

 basipodite. 



Notes: Variability of many features is characteristic of L. clausi., 

 especially the body shape and structural details of the appendages. Some 

 of these are not constant while others offer a possibility to identify sub- 

 species, and still others are so significant and constant that they enable 

 one to identify a group of independent species that are mutually close 



