PHYLI.OPOD CRUSTACEA 39 



segments, especially posteriorly; at each end of each ridge are 1-10 curved spines along the 

 posterior margin of the segment, the 2nd pedigerovis segment having 1 spine on each side, 

 and the numl)er increasing- posteriorly ( l-"igure 3, e). According to Daday the 3rd to 7th 

 ahdominal segments have a girdle of spines around the posterior margin. In the specimens I 

 have examined, these segments hear from about 6-25 spines on the posterior margin, increas- 

 ing in numbers per segment posteriorly to a maximum on the 5th or 6th segment. The 

 spines do not form a girdle, but tend to occur in groups of 2 or 3 with a space between the 

 groups. The spines are absent, or small and few near the ventral mid line, thus giving an 

 effect quite unlike Daday's figure (F"igure 3, e). Cercopods as in the male. 



Head smoothly rounded in front. First antenna biarticulate and hjuger than 2nil 

 antenna. Second antenna oval in cross-section, tapering abruptly at distal end, to a pointed 

 spine-like process (Figure 3, b). Eyes smaller than in male. Mouth parts as in male. 



Legs as in the male. 



Ovisac short and broad; ventral view something like a beef heart, but with an obtusely 

 conical process on each side of the posterior end, and slightly dorsal to it (Fig-ure 3, d, e). 



Dimensions about the same as in the male or slightly smaller. 



All of the specimens that I have examined are heavily infested with epiphytes and 

 attached protozoa. This suggests that growth is very slow, with long periods lietween 

 ecdyses. 



Family Branchipodidae Daday 

 1910 Branchipodidae Daday, Ann. Sci. Nat. (ser. 9) 11:287 



Eleven pedigerous, 8 or 9 postpedigerous segments. Front part of head of S fused with 

 basal joints of 2nd antenna to form a clypeus. Front of head of S unarmed, or with a 

 median process, or with paired processes. Second antenna of $ biarticulate. Legs with 

 1 epite. Cercopods freely movable, or fused to last body segment. Ovisac generally sub- 

 gliibular. The familv is absent from North and South America. 



Genus Braiichipiis Schaeffer-Daday 



1766 BrancJiipus Schaeffer. Elementa Entomologica 



1910 Braiichipus Daday. Ann. Sci. Nat. (ser. 9) 11 : 311 



Trunk segments smooth, unarmed. I'ostiiedigerous segments unarmed in l)oth sexes, or 

 with short digitiform processes in i. Cercojjods movably articulated with last body seg- 

 ment; straight and fringed all round with setae; or curved inward with outer margin setif- 

 erous, inner spiniferous. Distal joint of 2nd antenna of £ nuuh lunger than basal joint; 

 falciform, curved inwards. Clypeus of $ with paired short blunt frontal processes. Paired, 

 long filiform processes with bases connate arise from front of head (dorso-proximal part 

 of clypeus). Second antenna of 5 flat, blade-like, produced into a sharp a])ical point. Ovisac 

 short, oval, with a prominent ventral lolse. In the present-day restricted sense, this genus 

 contains only 2 species, one of which has been found only once, in the French Alps. 



