MUSEUM OF COMPARATIVE ZOOLOGY. 159 
Family MATUTIDZ. 
Osachila lata, sp. nov. 
Carapace laterally expanded; three low obtuse protuberances on the gastric 
region, one on the cardiac, three or four on the branchial. Front prominent, 
bilobed, the lobes separated by a completely closed fissure. Antero-lateral 
margin of carapace sharp; behind the point where the subhepatic ridge joins 
the margin, the margin is divided into five obscure lobes, each of which is 
denticulate. Merus of chelipeds tuberculous along the upper edge and outside 
of it; carpus tuberculate externally, distal and superior margins produced to a 
cristiform tooth which continues back upon the carpus the crest on the superior 
border of the propodus ; propodus tuberculate on the outer face, superior bor- 
der denticulate and cristate. Edges of ambulatory limbs slightly cristate, 
dactyli pubescent on distal portion. 
Length, 24.5 mm.; breadth, 32 mm. 
Station 3427. 80 fathoms. 1 male. 
Family DORIPPIDZ. 
4fthusa ciliatifrons, sp. nov. 
Carapace broader than long, branchial regions much inflated ; surface granu- 
lated on the branchial and cardiac regions, pubescent on the gastric region. 
Front and anterior part of the lateral border ornamented with long upturned 
cilia. Front between the orbits divided by a triangular median sinus and two 
slightly shallower lateral sinuses into four triangular teeth of equal length. 
Branchio-cardiac lines deeply impressed, meeting together in the median line 
in front of the heart. Eyes small, mounted on very short peduncles, just 
reaching, when extended, to the angles of the orbital sinuses. Chelipeds equal, 
small and slender; chela smooth, not more robust than the carpus; fingers 
longer than the palm, laterally compressed, curved inward, longitudinally 
grooved, thin prehensile edges straight and regularly denticulated. Ambu- 
latory appendages very long (the second longer than the first), naked and 
minutely granulated; propodus slightly shorter than the merus, compressed, 
grooved longitudinally on both the upper and lower faces; dactylus one half 
longer than the propodus, flattened, curved, grooved and ribbed longitudinally, 
its upper edge very sharp. Last two pairs of thoracic limbs densely clothed 
with setae. Sternum rather coarsely granulated. Conspicuous red transverse 
bands adorn the chelipeds and first two pairs of ambulatory appendages. 
Length of a male (carapace), 26.5 mm.; breadth, 29.5 mm, 
Station 3387. 210 fathoms. 
«3389. 153 “K 
“« = 3391. +259 3 
Se araouG,. Lae ve 
