h is broadi the base. very narrow in the upper part Ii is not covered by the lateral 



paris of tl al latera. 



tral latus is of an irregular shape, iis basal margin being short and going 

 into the latera] margin which is convex. The scutal margin is slightly hollowed 

 the angle il describes with the lateral margin truncated. 



■■ i n tra - m cd i a i) latus is triangular with the rostral margin slightly hollowed oul 

 and the carinal margin convex. The umbo is at the apex which is distinctly benl forward. 



rhe carinal latus has the umbo a little beneath the middle of the carinal margin. 

 The part of that margin above the umbo is strongly hollowed out, that beneath the umbö 

 distinctly convex. The basal margin is short, the lateral margin feebly hollowed out. The upper 

 margin tornis a sharp angle with the upper pan of the carinal margin. That part of the latter 

 where the umbo is situated can hardly l>c said to project beyond the line of the carina. 



General remark concerning the form of the valves. The form of the 

 valves as described above only appears alter a good deal of the feltlike membrane with the 

 calcareous algae and the muddy particles attached to them has heen removed. 



The peduncle is cylindrical. The scales on the surface are not very numerous, broad 

 and rather prominent. They are placed on five not very regular rows, about fïve scales forming 

 such a row. 



Si /e. Length of the whole animal 11,25 mm., of the capitulum 8 mm. 



The specimens of this species wen- found attached to cylindrical black sticks of tour or 

 five centimeters in length, the nature of which I do not know. 



The study of the structure of the female animal contained within the capitulum has 

 eriven the following results. 



Body narrow, elongated, legs relatively stout. 



Mouth with the labrum slightly bullate, edge with a Ion- row of small, pointed teeth. 

 Palpi triangular, pointed, with a few short hairs on the inner side and a tuft of longer ones 

 at the extremity. 



Mandibles short, with three teeth, each slightly swollen at the extremity. The inferior 

 angle is delicately pectinated and the surface over a great part is covered with very thin hairs. 

 forming groups ol three or more. 



Maxillae with a distinct notch beneath the group of upper spines. which consists f 

 011e very stout spine, one rather stout and one or two much more delicate. Beneath the notch. in 

 which only some ver) short hairs are planted, the edge bears about seven spines of unequal size 

 and a few very delicate and much shorter spines. Surface covered with hairs, arranged in groups. 



5 riiiul maxillae bulky; outer surface rounded covered by numerous lono- hairs. 

 forming a tuft at the upper extremity. The opening giving entrance to the body cavity is at 

 end of a broad and flat tubular process, cut off abruptly at the extremity. 



Cirri. First pair planted close to the mouth, separated from the second by a distinct 



pace. branches of the first pair '<\ unequal length, the shorter is slightly broader and has 



1. tlv longer nine segments. Nearly the whole surface of both rami is covered with numerous 



and rather long hairs. Cirri of the following pairs relatively short and stout; the rami of 



96 



