68 THE VOYAGE OF H.M.S. CHALLENGER. 



and densely plumose. The right foot of the fifth pair in the male (figs. 9, 10) is shorter 

 than the left, and ends in a prehensile hand, one limb of which is broad and rounded, 

 bearing two or three short apical setse, the other forms a falciform claw ; the foot of the 

 left side consists of four nearly equal joints, the last two being more or less copiously 

 ciliated. In the female, the feet of the fifth pair (figs. 11, 12) are cylindrical, three-jointed, 

 the last joint elongated, subulate, and bearing two or three apical teeth. In the adult 

 female the first abdominal segment (fig. 1) is usually produced at each side into a triangular 

 prominence ; the caudal stylets are extremely small, the setse spreading, subequal, 

 and about as long as the abdomen. The male abdomen (fig. 13) has the first somite 

 produced on the right side only, forming a large spine-like acutely-angular projection. 



Habitat. — Candace pectinata occurred in very many of the Challenger surface 

 gatherings, often in considerable abundance. The species has a wide range of 

 distribution, ranging from Australia in the south-east to the Scilly Islands in the north- 

 west. Though so common a form, I cannot identify it with any of the species described 

 in Dana's great work, probably on account of the insufficiency of the descriptions there 

 given. It is the only member of the genus which has been met with in the British Seas, but 

 does not appear among the Mediterranean species described by Dr. Claus. 



The following are the localities of the Challenger captures : — off Cape Howe, Australia; 

 off Port Jackson ; between Sydney and Wellington ; between Api and Cape York ; in 

 various places about the Philippine Islands ; and at several Atlantic Stations between 

 Ascension and the Azores. 



2. Candace pachydactyla, Dana (PL XXXI. figs. 2-9). 



Candace pachydactyla, Dana, Crustacea XJ. S. Expl. Expecl., p. 1113, pi. lxxviii. fig. 2, a.b. 



Length, l-8th of an inch (3*1 mm.). In general form like Candace pectinata. The 

 apical portion of the anterior antennae (figs. 2, 3) is usually deeply coloured ; the coalesced 

 seventeenth and eighteenth joints of the right male antenna (figs. 3, 4) are densely pec- 

 tinated with short, rigid setse, and the nineteenth joint bears a shorter series of similar 

 setse ; relative sizes of the joints as in the preceding species. The outer branches of the 

 swimming feet have the last joint only deeply coloured throughout, the inner branches 

 are uncoloured ; the terminal spines usually short and twisted. The right foot of the 

 fifth pair in the male (fig. 6) is prehensile, the second joint forming a blunt, falciform 

 claw, which opposes a broad, ovate third joint ; the foot of the left side is longer, four- 

 jointed, the two terminal joints sparingly setiferous ; in the female (fig. 8) the fifth pair 

 of feet are stout, three-jointed, the last joint divided at the apex into three stout teeth, 

 bearing a few short marginal setse, and on the middle of the outer margin a single tooth. 

 The abdomen of the male (fig. 9), like that of Candace pectinata, forms on the right side 



