Mr. Lubbock on two new Subgenera of Calanidse. 205 



hair is a row of finer hairs placed close together, besides the usual 

 spines which are larger and much further apart. 



Fifth pair of thoracic legs. Female (fig. 6). Very small, 

 ^^2 inch. The basal part consists of two joints, the apical pro- 

 duced externally into a lobe which represents the inner branch of 

 the preceding legs, and bearing externally a simple segment, 

 analogous to the external branch, which bears at the apex three 

 spines closely applied to the organ. Attached to the second seg- 

 ment is a large plumose hair which extends to the apex of the 

 terminal segment. 



Male (figs. 4 & 5) . The left leg is simple, four-jointed, as large 

 as the right, curved towards it, and larger and stronger than the 

 corresponding leg of L. Darwinii. The terminal segment bears 

 on its internal margin two lobes ; close to the apical lobe is a 

 simple hair and a delicate pointed appendage. At the basal lobe 

 there is a short bail' and two very delicate tufts. Length ^V inch. 

 I could find nothing similar to the penis ? of L. Darwinii. 



The right leg is prehensile, and also consists of four joints. 

 The first is short, the second longer, the third large, muscular, 

 and the external basal angle produced into a large claw; the 

 fourth segment is long, slender, and cm-ved, and forms with the 

 preceding joint a powerful prehensile apparatus. This finger 

 bears on the internal margin two slight protuberances and a 

 small hair, and near where it rises, there is on the third segment a 

 rounded knob. When the prehensile apparatus closes, this knob 

 is received into a corresponding depression at the base of the 

 apical segment, by which contrivance the points of the fixed and 

 of the moveable claw would be forced into opposition, and the 

 strength of the organ greatly increased. 



Abdomen. Male. Four-jointed, the terminal joint bearing 

 two lamellae which rise from a common base, and are terminated 

 by five long setose hairs. 



It is exactly like that of Pontella, Lahidocera, &c. 



Female (fig. 7). Small, two-jointed; the two joints are of 

 equal size, and the second bears two small round lobes, each 

 with five setose hairs, which represent the lamellae in the male. 



The abdomen of some females differs slightly from the above 

 description ; the joint is not apparent ; on the left side is an un- 

 symmetrical projection, of a horny appearance, and the whole 

 base has an irregular outline and a reddish chestnut colour, 

 almost as if a glutinous matter had been poured over it and had 

 hardened there. On this there is a cyhndrical appendage, the 

 natm-e of which is as yet doubtful. It is large, elongated, 

 of nearly equal thickness throughout, but slightly swollen at 

 the apex, and terminated by a short narrow neck, attached to 



