192 Mr. R. Templeton's Desc7uptiotis of 



about one inch. The animal is very slow and deliberate in its mo- 

 tions. It was found among marine plants at Riviere Noir, Mau- 

 ritius. 



Fig. 6. a. The animal magnified. 



b, The anterior part of the head, showing the anterior pair of legs and 



the palpus. 



c, Extremity of superior antenna. 



Caprella {Lam.) nodosa. Plate XXI. fig. 7. 



Pale brown, with a darker longitudinal line marking the position 

 of the intestinal canal. Head very short, the separation from the 

 1st joint being only distinguishable by a minute dark dorsal line ; 

 the eyes black and smooth, not apparently compound : superiorly the 

 head is furnished with a small blunt spine curved forwards. Supe- 

 rior antennae longest : 1st and 2nd joints robust, elongate, and al- 

 most ever porrect, the greatest amount of motion taking jilace at 

 the articulation between the 2nd and 3rd joints ; the 3rd is shorter, 

 somewhat obconic, and supports the remaining joint, which is taper- 

 ing, multiarticulate, the subdivisions being nearly of equal lengths, 

 and furnished with a few short, often articulated, blunt spines to- 

 wards their distal extremities. The three first joints have similar 

 processes, but they are not confined to this latter 2)osition. The infe- 

 rior antenna is in length about one third less ; in other respects it 

 bears a considerable degree of similarity to that just described. As 

 far as I could observe, the animal has a double set of palpi, but pro- 

 jecting so little beyond the buccal plates as to be scarcely distin- 

 guishable ; the hook and one joint of the inferior was alone porrected 

 sufficiently to be sketched. The 1st joint of the body is short, per- 

 forming the office of a neck, and has arising from the head imme- 

 diately in front of it a small leg, precisely similar to that attached to 

 the anterior part of the succeeding joint, and of which a more mag- 

 nified sketch is given. The 2nd joint of the body is longer than the 

 head and 1st joint taken together, but both are so extremely shox-t 

 as to distinguish this from all other authenticated species. In some 

 specimens this joint and some of the others have two or three small 

 processes in groups, moveable and occasionally articulated, project- 

 ing from the back. The 3rd and 4th joints of the body are rather 

 elongate, and each has a flat pyriform vesicular appendage articulated 

 to it, within whose edge is distinctly to be seen a large vessel carry- 

 ing blood ; the globules are oval, and easily to be distinguished pass- 

 ing across the appendages in wavy lines with irregular velocity, 

 pausing sometimes as if stagnated, and again urged forwards until 

 they mingle in the stream, returning along the posterior edge of the 



