60 
PACIFIC SCIENCE, VoL VII, January, 1953 
inferior margin, distal 10 paired. Dactylus 0.25 
as long as merus, curved, tapering to acute 
tip, with very slight accessory tooth about 
0.7 distance to tip; small tuft of short thick 
spines or bristles opposite biunguiculation. 
Parts of third legs present similar to fourth 
but larger. 
DISCUSSION: A single chela from the "Al- 
batross” Station 3847 (U. S. N. M. 63571), 
off Laysan Island, 97-199 fathoms, undoubt- 
edly belongs to this species. The chela, shown 
in Figure 17^, is almost identical to the form 
described above. The palmar grooves of the 
outer face are deeper and the inner face has 
irregular depressed areas, but a closer exam- 
ination shows that without question these are 
the result of shrinking during a previous des- 
iccation. The only difference is the armature 
of the superior margin of the merus where the 
small spines are so closely pressed against the 
rounded edge that only two can be discerned. 
Careful examination did not disclose any 
more spines; but possibly in a better pre- 
served specimen more would be visible. 
The specific name refers to the short, broad 
merus of the large cheliped. 
relationship: The separation of this spe- 
cies from the related species and varieties in 
the C. hailstonei complex is given in Table 2. 
It is unfortunate that the only specimen of 
this apparent species available has the frontal 
region of the carapace distorted and abnormal 
but other characteristics are sufficient to sep- 
arate it from the related forms. It may be pre- 
sumed, however, as none of the seven other 
species and varieties differ markedly in the 
nature of the rostrum and the orbital hoods, 
that in this species too the rostrum is rather 
elongate and the orbital teeth are well devel- 
oped, probably quite like the development of 
C hailstonei paucispinata Banner (Fig. 16 a). 
The decisive differences between this spe- 
cies and the variety C hailstonei var. paucispi- 
nata are three: First, the merus of the large 
chela is very short and broad, markedly short- 
er than the palm of the chela is high; second, 
the merus of the small cheliped is less than 
0.5 the length of the chela; third and prob- 
ably most important, the second article of the 
carpus of the second leg is 1.5 times as long 
as the first instead of only 0.5 as long. In my 
opinion, these three pronounced differences 
are great enough to separate this form as a 
distinct species. 
Crangon albatrossae sp. nov. 
Fig. 18 a-m 
TYPE specimen: An ovigerous female 33 
mm. long, "Albatross” Station 4031 (U. S. N. 
M. 63588), Penguin Bank, west of Molokai, 
in 27 fathoms. Paratypes listed below. 
DESCRIPTION: Rostrum 0.7 as long as visi- 
ble portion of first article of antennular pe- 
duncle, somewhat rounded dorsally, twice as 
long as broad at base; upper surface some- 
what depressed toward tip. Orbitorostral 
grooves broad and shallow. Orbital hoods 
slightly inflated, with teeth reaching 0.5 length 
of rostrum. Margin of carapace between base 
of rostrum and orbital teeth straight but at 
angle of about 30° to transverse line of body. 
Second antennular article 3 times as long 
as broad, 1.5 times length of visible portion 
of first article, over twice length of third arti- 
cle. Tip of stylocerite reaching to end of first 
article. 
Lateral spine of basicerite reaching approxi- 
mately to end of rostrum. Lateral spine of 
scaphocerite strong, lateral margin somewhat 
concave; tip reaching slightly beyond end of 
antennular peduncle; squamous portion nar- 
row, 0.9 length of lateral spine. Carpocerite 
slightly longer than scaphocerite. 
Large chela heavy, 2.4 times as long as 
broad, compressed, 1.7 times as broad as 
thick, tapering and distally sculptured. [For 
terminology of crests and grooves, see Fig. 
17^.] Superior crest rounded, terminating dis- 
tally as subacute tooth above dactylar articu- 
lation; merging soon with superior margin of 
chela proximal to transverse groove. Trans- 
verse groove deep and abrupt, proximally 
overhanging. Superior groove deep. Plaque 
