38 I'lIVl.I.npOn CRUSTACEA 



I lead naiiulcd in fmnt. 1st antenna Inarticulate, considerably longer than the basal joint 

 of ind antennae (bii^ure 3, a), liasal joint of the 2nd antenna roughly 'i as broad as 

 lonjj, rouyhlv kei;-sha])C{l ( l-'iLTiTe 4, a). A sliijhtly raised area on the outer, distal margin 

 of the basal joint nf the _'nil antenna may be minutely setulose (not shown in figure); and 

 there may be a short, ill-defined, transverse ridge, on the lateral side of this joint near the base, 

 bearing 10-12 slender setae. Distal joint of second antenna with sul>-conical basal portion, 

 becoming flattened distally. Outer margin of distal portion is a flattened arc; inner margin 

 sinusdid, and minutely serrate, with the ])oints uf the serrations direi'ted basally. On dorsal 

 interior surface of basal joint of the 2nd antenna is a pointed process calleil ])y Dada)' the 

 "serriform process"; it is taeniform with tiie distal end drawn out; the margins are entire; 

 a row of short digitiform papillae parallels each margin on the ventral surface. In preserved 

 specimens, the serriform process is usually spirally twisted. 



Chewing surface of mandibles in shape of a rough parallelogram, about 30-35 rows of 

 teeth, the teeth being directed anterior!}'; ;U dorsal edge of chewing surface are a few large, 

 conical s])ines. 1 have been unal)le to detect any trace of the mandil)ular palp (which in 

 several other jihyllopod genera is represented by a small papilla). 1st maxilla broad and flat 

 distally, ending in a row of 15-16 long, plumo.se, biarticulate setae. l>asal portions of the 

 setae armed with distally directed spines which number 1 or 2 on the lowermost seta and 

 increase in number uj) to 8-12 on the upi)ermost seta. These spines are on the side of the 

 setae opposed to the setae of the opposite 1st ma.xilla. Lower than the lowermost seta is a 

 small spine which appears to be morphologically a much reduced seta, a.s it is supplied with its 

 iiwn tendon ( h'igure 4, b). 2nd maxilla reduced as is usual in the sub-order, ending in a 

 large, slightly cur\-ed claw armed with a few minute spines; provided on its medio-anlerior 

 tidge with three strong, ])iarticulate, jjlumose setae: on ventral surface, lielow bases of setae is 

 a short, stout spine directed distally (posteriorly). Several patches of extremely fine hairs on 

 the 2nd maxilla are much too flne to be shown in the figure (JMgure 4, c). 



Swimming legs 1-10 with 2 epites with markedly serrate edges. Last pair of legs vari- 

 al)le in this respect, having 2 sul^equal, narrow, pointed epites, or with the proximal epite much 

 the smaller, or entirely absent. Last legs of same individual may be unlike in this respect. 

 Margin of the distal endite of legs 7 and 11 tends to lie bluntly ])ointed ; of legs 2-10 more 

 evenly rouudetl. (iill with entire margin on all legs. I'^labellnm on legs 2-11 foliaform. with 

 <lorsal margin flatter than ventral. Mabellum of 1st leg foliaform, or subtriangular in out- 

 line. (I'igure 4, d, e, f, setae and sjiines shown only for 2 distalmost endites.) 



Each side of genital sac with 3 jirocesses directed posteriorly. N'entral ])rocess ends in a 

 lappet much flattened horizontally, end ol)Ii(niely truncated, sometimes much more so than in 

 figure, inner dorsal ])rocess digitiform, sometimes slenderer than shown in figure. Outer 

 dorsal process (penis) longer and nuuli thicker than others, a])proximately cylindrical, ends 

 in a flat, subtriangular jilate which is eversible and retractable. 'I'lie outline of the plate is 

 roughly that of a boot viewed from the side, hollowing this analogy, the plate is attached 

 by the leg, and bears 3 teeth on the top of the toe. These teeth are absent in juvenile 

 individuals (Figure 3, c). 



Total length variable, perhaps depending on season and food sup])ly, averages about 

 18-1 "J mm. from forehead to end of cercopods. 



Female: Second to 11th pedigennis segments with short transverse ridge across median 

 dorsal line; viewed from the side, the highest point of ridge is towards posterior margin of 



