MUSEUM OF COMPARATIVE ZOOLOGY. 159 



Family MATUTID-ffi. 



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, 

 j bilobed, the lobes separated by a completely closed fissure. Anterolateral 

 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 DORIPPIDJE. 



JEtkusa 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 



" 3391. 259 



" 3396. 127 



