Hawaiian Crangonidae — Banner 
29 
Comatularum Group 
S. alhatrossi Coutiere 
S. hiunguiculatus (Stimpson) 
Neomeris Group 
S. charon (Heller) 
5. prolificus (Bate) 
S. paraneomeris Coutiere 
5. macromanus Edmondson 
For the other species described in this paper, 
S. redactocarpus Banner, a new group should 
be established. With the shifting of S. biungui- 
culatus on the basis of its new description 
below from the Biunguiculatus Group to the 
Comatularum Group, it would be advisable 
to change the name of the former group. 
t 
HAWAIIAN SPECIES OF SYNALPHEUS 
1. Carpus of second legs with 4 articles . . 
S. redactocarpus (p. 29) 
Carpus of second legs with 5 articles . . 2 
2. Inferior hook of dactylus of third legs 
reduced in size, shorter and smaller in 
diameter than superior hook 3 
Inferior hook of dactylus of third legs 
larger than superior hook in basal di- 
ameter and usually longer 4 
3. Stylocerite reaching only to end of first 
antennular article. . .5. alhatrossi (p. 30) 
Stylocerite reaching to end of second 
antennular article 
5. hiunguiculatus (p. 32) 
4. Inferior hook of dactylus of third legs 3 
to 5 times diameter of distal hook, 
broad and blunt at tip 5 
Inferior hook of dactylus of third legs 
twice diameter of distal hook, acute 
at tip 6 
5. First article of carpus of second legs ap- 
proximately as long as rest combined 
S. charon (p. 37) 
First article of carpus of second legs 1.7 
times length of rest combined 
5. prolificus (p. 38) 
6. Palm of large chela tapering only slight- 
ly to fingers; fingers equal to 0.3 
length of palm. .S. paraneomeris (p. 40) 
Palm of large chela inflated, with diam- 
eter at fingers 0.5 maximum diameter; 
fingers less than 0.25 length of palm 
5. macromanus (p. 45) 
Synalpheus redactocarpus sp. nov. 
Fig. 8 a-i 
TYPE SPECIMEN: A male 5.1 mm. long, col- 
lected at Halape, Kau Coast, Hawaii, from 
coral heads in the intertidal zone on Keaoi 
Island by R. W. Hiatt (U. S. N. M. 93454). 
DESCRIPTION: Rostrum narrow and acute, 
reaching to near middle of second antennular 
article; in lateral view tip slightly depressed 
but higher than orbital teeth. Orbital hoods 
slightly inflated; orbital teeth acute, 0.7 as 
long as rostrum. 
Antennular peduncle short and heavy with 
visible portion of first article subequal to both 
second and third. Second article slightly 
broader than long. Flagella also short and 
heavy, outer slightly longer than peduncle, 
inner twice length of outer. Stylocerite reach- 
ing nearly to middle of second antennular 
article. 
Lateral spine of basicerite feebly developed, 
reaching only to base of spine of stylocerite; 
basicerite otherwise inermous. Scaphocerite 
with lateral spine heavy and broad at base, tip 
exceeding antennular peduncle and carpocer- 
ite; squamous portion broad, about 0.9 length 
of lateral spine. Carpocerite as long as anten- 
nular peduncle. Antennal flagella lost. 
Distal article of third maxilliped rounded 
in section, heavily spinose. 
Large chela showing compression and some 
torsion, without grooves, ridges, or other 
sculpture. Chela almost 3 times as long as 
broad, with arcuate finger occupying distal 
0.23. Carpus short, broad, expanded. Merus 
without spines but with superior distal angle 
produced into small tooth; article 2.2 times as 
long as broad, less than 0.3 length of chela. 
Small chela less than 2.5 times as long as 
broad with fingers subequal to palm. Fingers 
