62 PEOCEEDIXGS OF THE XATIOXAL MUSEUM. vol. 6u 



terminal joint is shortest and consi-ts of a short curved claw with 

 a biiid tip. carrying on its inner margin a long accessory spine. 



The mouth tube is in the shape of a truncated cone, a half longer 

 than wide, and is too opaque to reveal the structure of its bonv 

 framework. The first maxillae lie so close to the base of the mouth 

 tube that they are partially overlapped by its sides. Each consists 

 of a conical base surmounted by two long spines, which reach to the 

 tip of the mouth tube. 



The second maxillae are two- jointed, the terminal joint the longer, 

 club-shaped, and terminated with a wicked-looking array of spine-. 

 There is first at the inner distal corner a large claw curved outward 

 and armed with five rows of stout and acuminate spines. A semi- 

 circular row of long stiff hail's starts from the inner corner of the 

 base of tliis claw and curves around beckward onto tlie ventral 

 surface. At the outer distal corner is a semicircular row of large, 

 stout, and acuminate spines, which runs around the corner and then 

 sweeps down onto the ventral surface at either end. This combina- 

 tion of stiff hairs and ^harp spines must make a very effective 

 arrangement for keeping the mouth parts clean. 



The maxillipeds are the gi'asping organs and are very large and 

 powerful; they are two-jointed, the joints about the same length and 

 both strongly curved, the terminal one a simple claw. 



All four pairs of legs are biramose. the rami of the first pair one- 

 jointed, of the other three pairs two- jointed. The first legs are 

 peculiar, the exopod being a broad, falcate, strongly flattened lamina 

 curving around beneath the endopod. This is armed on its outer 

 margin with short and sharp teeth and is tipped with a curved, 

 blunt spine. The endopod is made up of three parts, all attached at 

 the same level; the outer one is a broad but simple plumose seta, 

 the other two are flattened laminae, covered with short hairs, the 

 inner one elliptical in outline, its terminal margin armed with 

 spines, the middle one triangular and tipped with a large curved 

 spine. The exopod is capable of independent motion and the living 

 copepod keeps shutting it past (underneath) the endopod like the 

 blade of a pair of shears. The other three pairs of legs are alike, 

 each consisting of a wide basal joint, with an oblique outer margin, 

 to which is attached the exopod. while the larger endopod is jointed 

 to the terminal margin. In both rami the joints diminish in size 

 from the base outwards, and all are heavily armed with spines. 

 On either side of the fifth joint in ventral view may be seen a small 

 rudimentary leg. pointed backwards. 



Color a bright clear yellow, nearly oj^aque ; the digestive tract and 

 egg strings a dark brown or even black, the legs almost white, the 

 bases of the second antennae, the maxillae, and the maxillipeds 



