14 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
process distally, spatulate process denticulated distally. Paragnath 
(fig. 6a) small, nodular, without distinctive armature. 
Ventral surface of cephalothorax with numerous heavily sclerotized 
knobs, adhesion processes and spikes. Postantennal process (fig. 5e) 
most prominent, extending as ridge from lateral anterior surface 
posteriorly to oral region, terminating as spinelike projection; ridge 
bearing 2 adhesion pads. Postantennal processes contiguous at base 
but not fused. Prominent pair of spinelike projections situated im- 
mediately lateral to antenna base, in position of postantennal process 
of many caligoids. 
TABLE 3.—Armature of thoracic legs I-V of the male of Pseudotaeniacanthus species 
Inter- | Protopodite Exopodite Endopodite 
Leg | Surface || podal cts ee eee ae 
Plate 
1 | 2 1 2 3 1 | 2 | 3 
I | Outer* 
m iP 3P c c ¢,2P 
Inner m,p GE 18 4P P ¢;P ¢,3P 
II | Outer p dm,H H 2H,Q’#,P c c c,h,2p’ 
Inner Ve fm c De 4P ey 2P 3 
III | Outer p H H 2H QP c c c,h,p’,fm, 
p’, 
Inner 12) fm ¢ 2 4P iP c,2P ¢,2P 
IV | Outer p dm,H dm,H | dm,H,H,2P | fm fm fm,h,fm,P 
Inner c ? 4P iP iP DLE 
V | Outer dm,p’,dm, 
PD jam; 
H 
*Position of rami in figure 6c reversed due to flattening and consequent movement during mounting; 
endopodite situated almost behind (posterior) exopodite in appendage in situ. 
#Seta-like process with plumosities on one side, naked on other. 
?Armature element may have been lost in handling. 
Maxilliped (fig. 66) 3-segmented, situated posterior and slightly 
medial to maxilla base. First segment irregular, base partially formed 
by heavily sclerotized ring; single naked seta present, on anterior 
inner surface. Second segment strongly developed, inner surface with 
large, heavily sclerotized, knob-tipped projection, projection with 
single row of denticles; inner distal surface with 2 contiguous oval 
adhesion pads. Third segment small, distinct from long, spinelike 
terminal process, bearing single, setalike accessory process. 
Thoracic legs I-IV biramous, rami 3-segmented; fifth leg uniramous, 
2-segmented. For nature of legs and armature see figures 6c-g and 
table 3. 
eal 
