Maxillae with a long, sinuous edge and a great number of nearly equal spines. Thi 

 at the upper corner are slightly larger and another group of the larger spinee is planted al 

 •sli the height from the inferior angle. The apodeme is stout and nol very long. 

 Outer maxillae are well-developed with the bristles of tl irly straight inner 



[in divided int<> two separate tufts, separated from one another bj ;i little excavation without 

 irly they are swollen and not ver) densely beset with bristles. The opening 

 leading into the 1 rity is large and situated on the top of a rounded protuberance. 



I ■ ■. 1 irst pair short and very stout; rami not very unequal in length; much m 

 so in the number of segments, and especially in breadth PI. VI, fig. 6). The anterior segment 

 nine, the posterior ^i\t««n segments. I In- segments of the anterior ramus are oblong in 

 iverse direction and are only united with one another over pan ol the breadth; the segments 

 of th( • rior ramus are as broad as they are long, with the exception <>|' the first segment 



which is longitudinally oblong. In both rami the segments ln-ar numerous spines along l 

 margins, the outer seerments over the whole surface. 



nd-sixth cirrus differ trom one another mainly in length; this difference is 

 greatest between the second and third cirrus. In the second cirrus the anterior ramus is mon 

 a little broader than the posterior ramus. in the other cirri this difference does not exist. All 

 the cirri give one the impression of being stout and well-developed. 



1 audal appendages small, composed of six cylindrical segments, the width of which 

 diminishes considerably from the first to the last; each segment bears a few very delicate bristles 

 at the extremity; the last segment has aboul hall' a dozen longer ones on the rounded u] 



Sex. The specimen investigated showed no tracé ol male ^cnital organs : neither 



testicula nor penis; I think this species must be considered as belonging to the group of 



exual species of which I discovered several representatives when studying the Cirripedia of 



the "Challenger" expedition. The specimens the description of which is given above were 



probably all femali 



Mal es. At first I could not find the males of this species. At last I found them on the 



specimen of Station 5: very small bead-like individuals attached in great number to the 



surface of tliat part of the sack <»r mantle of the female which connects the inferior halves of 



the two scuta at their occludent margin. I counted well over a hunderd of these little animals. 



Each of them is enclosed in a chitinous sack and are placed so near one another as to to 



and even to (latten each other mutuallv. Fig. 9, PI. VI represents a group of three of them-, 



in fig. 8 one of them is seen a little more enlarged. They are attached to the outer surface 



of the chitinous sack of the female with their small antennae, and their surface is hirsute with 



very short spines. The opening giving entrance to the interior of the sac is at the top of a 



conical papilla which projects beyond the surface of the remaining part of the sac Round 



ing are four very small calcareous parts like so many rudimentary valves and between 



. small 1 ences with short hairs, like minute tentacles, are planted. 1 have not been 



able to study the internal structure which can be done by making microtome sections only 



