MARINE AMPHIPODA IN MICRONESIA — BARNARD 501 



paper and stating that E. pedenicrus should be separated from E. 

 hrasiliensis. Since that time only a few largely Mediterranean 

 identifications of E. hrasiliensis have been published while many have 

 been recorded for E. iiectenicrus. In 1951 Oliveira redescribed E. 

 hrasiliensis from Brazilian material, along with two other species 

 described as new. Although she mentioned E. pedenicrus in a key 

 concerning antennae, she must have overlooked the fact that the 

 material of E. hrasiliensis she redescribed was precisely E. pedenicrus. 

 Her failure to discuss this question was unfortunate. If Chevreux's 

 (1911) description did not exist, then one might automatically re- 

 synonymize E. pedenicrus with E. hrasiliensis, on the basis that 

 Oliveira discovered it in the type locality; but one cannot consider 

 that the search has been exhausted, since an animal from Algeria 

 fits the description better. In addition, Oliveira's Elasmopus besnardi, 

 apparently based on a female from Trinidad, could also be E. hrasilien- 

 sis, despite an obviously poor figure of the animal. Perhaps it is a 

 female corresponding to Chevreux's redescription. Thus, the question 

 is not solved, especially in the lack of ecological information as to 

 abundances and sizes (probing the probability Dana might have caught 

 the largest or most abundant species), and the fact that Oliveira 

 included Chevreux's (1911) reference to E. hrasiliensis, while failing 

 to note the very great differences between the two collections. 



The material at hand corresponds well with that figured by Chevreux 

 (1911), except that adults are only 3 mm. in length, half the size of those 

 from Algeria; the hindmargin of the third pleonal epimeron is straighter 

 and the lower tooth slightly smaller than figured by Chevreux. Close 

 observation of the male second gnathopod shows a pair of large spines 

 at the distal end of the inner face of the palm, not shown by Chevreux, 

 plus a medial ridge of chitin having a small bump about halfway along 

 the palm. These gnathopodal characteristics should be rechecked on 

 Algerian material and on topotype materials, when available. 



Distribution : This is the first record of the species from the Pacific 

 Ocean. Known previously from Brazil, Mediterranean, South Africa. 



Elasmopus excavatus Schellenberg 



Elasmopus excavatus Schellenberg, 1938a, pp. .58-59, fig. 30. 



Material: Abbott station 90-C-4 (1). 



Distribution: Gilbert Islands; Ifaluk Atoll, Caroline Islands. 



Elasmopus pseudaffinis Schellenberg 



Figures 12, 13 

 Elasmopus pseudaffinis Schellenberg, 1938a, pp. 53-54, fig. 25. 



Material: Abbott stations 28-D-3 (2), 30-C-4 (2), 39-E-5 (3), 57- 

 E-2 (1), 58-F-2 (3), 60-D-l (1), 66-E-lO (3), 70-C-3 (1), 72-G-3 (2), 



