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The integument has transverse constrictions on each somite of the 

 pereon and the pleon, such that their dorsal surface appears tubercular. 

 The head is approximately equal to or slightly shorter than somite I of 

 the pereon and its height markedly more than its length. The eyes in 

 fixed specimens look like irregularly triangular yellow spots, narrowed 

 dorsally, and with no trace of ocelli. Antennae I are equal in length to 

 the head and somite I of the pereon; the base is short; the 1st segment 

 • of the flagellum is elongated-oval with a rounded anterior end. Antennae 

 II are shorter than antennae I, six-segmented, with the 4th segment the 

 largest. In the mandibles the palp is strong, with elongated segments, the 

 2nd segment much longer than the 3rd. In maxillae I the outer lobe bears 

 six spines. The maxillipeds have a low medial lobe extending to 1/3 the 

 height of the outer lobes. 



The lower lateral sides of the somites of the pereon project above the 

 base of the coxal plates in the form of a pecten, similar to the longitudinal 

 crest, which modifies on the lateral sides of the pleon and urosomite I 

 238 into a longitudinal ridge. The pereon is longer than the pleon and urosome 

 together; somite II is just slightly longer than somite I and equal to somite 

 VII; somites IV-VI are the largest and almost equal in size. The coxal 

 plates have a more or less pronounced anterior lobe. The 2nd segment of 

 pereopods I is broadened, with a covex anterior margin, and is somewhat 

 shorter than the rest of the leg; the 5th segment is slightly elongated; the 

 6th segment is equal to the 5th in length but narrower; the posterior margin 

 of the 4th-6th and anterior margin of the 5th-6th segments are pubescent 

 and have short setae; the claw is strong and about 1/3 the length of the 

 6th segment. The 2nd segment of pereopods II is highly broadened, with 

 a semicircular anterior margin, barely convex posterior margin, and 1.8 

 times longer than wide, exceeding the length of the rest of the leg; the 

 5th segment is slightly longer than the 4th; the process of the chela hardly 

 extends to the middle of the 6th segment; the 6th segment is equal to the 

 5th in length; the claw is about half the length of the 6th segment; the 

 sides of the chela facing each other and the posterior margin of the claw 

 are finely denticulate. The 2nd segment of pereopods III-IV is equal in 

 width to the maximum width of the analogus segment in pereopods II 

 and V, and its length is approximately twice its width; the 6th segment 

 in pereopods III is slightly longer, in pereopods IV, 1.5 times longer than 

 the 5th segment; the claw is 1/4 and 1/5 the length of the 6th segment in 

 pereopods III and IV respectively. The 2nd segment of pereopods V is 

 twice longer than wide; the 4th and 5th segments are equal in length and 

 three times longer than wide; the 6th segment is narrower than the 5th and 

 1.5 times longer; the claw is about 1/6 the length of the 6th segment. The 

 2nd segment of pereopods VI is broader and longer than in pereopods V, 

 its length twice its width; the 6th segment is barely shorter than the 5th; the 



