56 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



can also be found in many other characteristics. The presence of 

 pliimosities on the dorsal surface of the cephalothorax in immature 

 adult (with spermatophore) female specimens is suggested only by 

 small, spikelike irregularities in ovigerous female specimens. The 

 dimensions of the female genital segment become larger as egg pro- 

 duction begins; the angle changes at the point where the genital flap 

 projects, and the flap becomes distinct from the segment in the ma- 

 ture adidt female. The projections on the first abdominal segment 

 of the female greatly enlarge in the transition from the immature to 

 mature adult condition. The claw-containing process on the prox- 

 imal inner surface of the male maxilliped is poorly sclerotized: the 

 claw projects in the immature state while it is heavily sclerotized 

 and is covered by the cuticle in the mature adult. The described 

 differences in the armature of the thoracic legs are more difficult 

 to reconcile although specimens collected from the same species of 

 host in the same geographic area (Line Island specimens) exhibit this 

 variation. Most of the change, however, occurs in the genital seg- 

 ment, the abdomen, and the amount of sclerotization. These var- 

 iations are evident not only in the material used for this description 

 but also in specimens identified as E. hrachyptera by C. B. Wilson 

 (USNM 78931). It is suggested, therefore, that some of the char- 

 acteristics previously used in the taxonomy of the species in the genus 

 should be reexamined on the basis of the maturity of the specimens. 



Gloiopotes Steenstrup and Ltitken, 1861 



Diagnosis. — Cephalothorax ovoid, consisting of cephalon and first 

 4 thoracic segments, with spines or hairlike processes, or both, on 

 dorsal surface. Free fourth pedigerous segment with alae. Female 

 genital segment with pak of lobate projections posteriorly. Fifth 

 legs large, heavily sclerotized, projecting past genital segment proper, 

 either rodlike or lobate; sixth legs, if present, strongly reduced. 

 Abdomen elongate, 2-segmented, caudal rami rodlike. Antenniile 

 2-segmented; antenna 3-segmented, with clav/like terminal process, 

 male terminal process modified. Mandible rodlike, distal surface 

 slightly flattened, with 12-13 denticulations along inner surface. 

 Maxillule nodular, with several setalike processes; maxilla 2-seg- 

 mented. Postantennal process consisting of plate bearing 1 or more 

 spinelike projections and 2 nodules, each with several hau'lilce proc- 

 esses; postoral process spinelike, bifurcate, or simple. Maxilliped 

 2-segmented, prehensile. Thoracic legs I-III biramous although 

 endopodite of first leg reduced ; fom-th thoracic leg uniramous. Ramal 

 count of first 4 thoracic legs 2-2, 3-3, 3-2, 3 ; second segment of exopo- 

 dite of first leg tipped by 1 simple and 2 bifid spines, bifid spines wdth 

 spinelike accessory process. 



