6 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 125 
carapace length, which does not include the rostral plate, is also 
measured on the midline. 
The count of teeth on the dactylus of the raptorial claw always 
includes the terminal tooth. An abdominal spine formula of sub- 
median 6, intermediate 4—6, lateral 2-6, marginal 1—5 indicates that 
the submedian carinae terminate in spines only on the sixth ab- 
dominal somite; the intermediate carinae terminate in spines on the 
Abdominal Thoracic 
somites somites Carapace Rostral plate 
| Eye 
Z -— Antennule 
Telson pp kg ( Lar) He \ Ab \ 
ie Nee scale 
First 
jmaxilliped 
Mandibular palp 
NBesigaat claw 
pleopod 
os Ventral keel, 
Uropod eighth — Third maxilliped 
thoracic Fifth maxilliped 
somite 
Epipod 
Ventral spine 
Male copulatory tubes 
Third pereiopod 
ad 
Carpus jMerus 
—»~— Ischium 
Dorsal ridge 
of carpus 
Proximal, Movable ——.2 
teeth 
Pectinations es eine 
—F 
Teeth of dactylus CG/ 
Propodus 
b 
Ficure 1.—Diagrammatic sketches: a, a squillid; b, a raptorial claw. 
fourth, fifth, and sixth somites; the laterals are spined on the second to 
sixth somites, inclusive, and the marginals on the first to fifth somites, 
inclusive. A telson denticle formula of ‘4, 6-8, 1” indicates that on the 
margin of the telson, on either side of the midline, there are four 
submedian denticles, six to eight intermediate denticles, and one 
lateral denticle. 
Many of the terms used in the descriptive accounts are shown in 
figures 1 and 2. Although the figures are based primarily on squillids, 
