58 
PACIFIC SCIENCE, Vol. VII, January, 1953 
"Albatross” Station undesignated (U. S. N. 
M. 84243): Hawaiian Islands; 1 speci- 
men. 
Crangon brachymerus sp. nov. 
Fig. 17 a-j 
TYPE SPECIMEN: The type and only known 
specimen is an 18 mm. male, from "Alba- 
tross” Station 3874 (U. S. N. M. 63536) be- 
tween Maui and Lanai Islands, 21-28 fathoms. 
DESCRIPTION: Frontal region of carapace 
abnormal, distorted and strongly asymmetri- 
cal, with right orbital tooth rather poorly de- 
veloped and left entirely lacking; rostrum dis- 
placed and bent sharply ventrad. Second an- 
tennular article about 0.1 longer than visible 
portion of first, 1.7 times length of third, al- 
most 3 times as long as broad. Stylocerite 
reaching to end of first antennular article. 
Lateral spine of basicerite about 0.8 as long 
as stylocerite. Lateral spine of scaphocerite 
reaching slightly beyond end of antennular 
peduncle; spine moderately strong, squamous 
portion narrow. Carpocerite also reaching 
slightly beyond end of antennular peduncle, 
but slightly shorter than scaphocerite. 
Large chela similar to C. hailstonei var. pau- 
cispinata Banner (p. 51), compressed, 2.7 
times as long as high, with fingers about 0.25 
as long as entire chela. [For terminology of 
crests and grooves see Fig. 17^.] Superior crest 
acute distally, terminating in strong, acute 
tooth above dactylar articulation, merging 
proximally with superior edge of chela. Trans- 
verse groove deep with proximal margin more 
or less overhanging, distally rounded. Superior 
groove deep. Plaque crest pronounced, with 
sharp ridge, proximally merging with superior 
margin of palm. Palmar groove shallower and 
less well defined than superior groove. Inferi- 
or crest arising from middle of palm, termi- 
nating distally in tooth below dactylar articu- 
lation, smaller than superior tooth. Inferior 
depression marked, shoulder strong but 
rounded. Dactylus strongly twisted, with high 
crest, narrow blade; inner surface of dactylus 
with 2 large rounded lobes distally that meet 
cutting surface of immovable finger; distal 
lobe with several groups of short strong bris- 
tles. Carpus small. Merus very short, only 0.6 
as long as height of palm, broad, 3.0 times as 
long as breadth of outer face, 1.2 times as long 
as maximum breadth at distal end, with 3-4 
small spines along superior margin and 5 
stronger spines on inferior internal margin. 
Superior margin of merus distally produced 
but rounded; inferior internal margin greatly 
produced distally as broad, flat process termi- 
nating as strong tooth. Ischium of usual form, 
without spines. 
Total length of small cheliped 0.8 length 
of large cheliped, with chela 0.6 as long as 
large chela and merus 1.3 times as long. Chela 
0.25 as broad as long, somewhat compressed, 
with teeth, crests, and grooves similar to large 
chela but much more poorly developed. Su- 
perior crest developed but rounded; trans- 
verse groove very shallow; plaque crest con- 
tinued as rounded ridge across palm; inferior 
crest also rounded; superior and inferior crests 
terminating distally as small but acute teeth 
at dactylar articulation. Fingers 0.8 length of 
palm; immovable finger thin and slightly 
twisted; dactylus with high, blade-like crest 
continuing almost to end, cutting surface 
knife-like, whole article twisted into shallow 
S-shape. Carpus slightly larger than that of 
large chela. Merus 4 times as long as broad, 
with superior margin bearing 4 short spines 
and scarcely projecting, rounded, distal ter- 
mination; inferior internal margin with 7 
small spines and simple terminal tooth. In- 
ferior surface of ischium with single spine. 
Carpal articles of second legs with ratio 
10 : 14.5 : 5.5 : 6 : 6. Chela 0.8 length of first 
carpal article. 
Third legs in specimen broken. Fourth 
legs with ischium 0.5 length of merus with 
strong movable spine. Merus 9 times as long 
as broad, distally unarmed. Carpus almost 0.6 
length of merus; superior margin projecting 
as short, acute tooth. Propodus 0.7 length of 
merus, with 13 moderately strong spines on 
