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U.S. NATIONAL MUSEUM BULLETIN 2 58 



Figure 46. — Lepidepecreum Igurjanovae Hurley, female, 4.0 mm., station 41: a, head and 

 epistome-upper lip complex; b, pleon, lateral view, left side; c, d, antennae 1, 2; e, f, g, 

 uropods 1, 2, 3; h, gnathopod 2. Male, 5.2 mm., "Velero" station 5880: i, j, k, gnathopod 

 1; /, pleonites 3-6, lateral, left side, dorsal margins; m, uropod 3. 



articles; pereopods 1 and 2 with or without a large distal spine on 

 article 6; third pleonal epimeron variable in shape; inner ramus of 

 uropod 2 constricted or not; outer ramus of uropod 3 uni-or Inarticu- 

 late; peduncle of uropod 3 simple or formed variably into a lamelliform 

 plate laterally; inner ramus of uropod 3 variable in length but always 

 more than half as long as outer ramus; telson entire or emarginate. 

 Remarks. — The obscurity of the type species, Lysianassa costae 

 Milne Edwards (1830, see Stebbing, 1906, for reference), with its 

 type locality in the Gulf of Naples, apparently has led to a conception 

 of the genus based on L. plumosa Boeck, as analyzed by Sars (1895) 

 "mistakenly" under the name of L. costae. Stebbing (1906) did not 

 consider any of the species described from the Mediterranean subse- 

 quent to 1830 to be L. costae, although Pirlot (1933) believed L. costae 

 to be a senior synonym of L. bispinosa Delia Valle (1893). Nine other 



