to the left and at th< bottom of tl When two were preseni PI IV, 



I th.it the anterior portion of the one touched the posterior end 

 . » li.it .1 mucli constricted part of the males through the skin 



the female; thei rule a thickening ent round about the ba 



.i\ of the peduncle with its cement-ducts passes through this cushion 

 üt. I»ui I : that it also went through the wall of the or mantle). 



PI. V are drawn from a male o im. 1>\ part in 



:it of tli*- oblique fold tin • thorax, the rest the peduncle of the animal. The thorax supports 

 tw rudimentary cirri and, more t<> the so-called ventral side, the part ol the mouth. 



I labrum i i «roa.l with a nearly straight all palpi. The latter have a i 



at their j •* >i i it< -. 1 extremity. 1 In- mandibles have three teeth, more diverging 

 in in the fem te inferi e is quite undeveloped: .i mere nob with ;i rudimentary 



point it spine at the extremity. The maxillae show the three upper spim . and two more spines 

 the in: nd of the edge separated by a notch from the upper spines. The two stand 



at a little distance from one another and are considerably shorter than the upper spinis, two of 

 which are again stronger than the third which is planted between the two. TIn- outer maxillae 

 are relatively large; they show a row of smal! bristles along the curved outer side, they have 

 the so-called olfactory oi il the end of flat tubular proo exactly as in the f< and 



jnst as already described by Darwin. 



The two pairs of limbs which represent the cirri have one ramus only. Darwin concluded 

 from the position of the excretory orifio nital porus and anus) that these cirri answer to the 



hTth and sixth pair in other Cirripedes — but this view is not supported by the circumstance, 

 that I da rudimentary capsule in the basal segment of the first pair (in a small specimen 



of t,4 mm.), inuch resembling the so-called auditory sack. Hence 1 would conclude that the 

 first leg represented the first cirrus of an ordinary Cirriped. 



These legs vary much in size and are often represented by one- or two-jointed rudiments 

 only, either on one or on both sides of the same individual. I found them relatively large, 

 the first pair composed of 5, the second of 6 segments, in the 2,5 mm. long specimen which 

 accompanii 3,5 mm. male of figure 5. In the largest of the two (the front par) of which 



is figured PI. V, fig. 4) the basal segment which according to Darwin represents the pedicel 

 of the cirrus. and which is beautifully pigmented with brownish purple, was very large in the 

 one cirrus as well as in the other. The anterior cirrus which was smaller than the posterior 

 and planted a little lower down on the thorax had four segments besides the basal one; the 

 posterior cirrus or leg had the same number, the terminal segment being moreover indistinctly 

 divided into two segments. Little brushes of spines are planted on the the segments, 



htly more prominent towards the dors. il side. 



In the fig. .( of PI. V I have indicated the free edge of the thorax as seen through the 



nent of the last .cirrus. Following that edge behind the last pair of cirri we see that 



it forms a round e a rather stout papillus, which projects freely at the so-called 



body. This papillus mo 1 probably represents the penis I would say so 



with . .. if I had heen successful in d ing the genital porus at its surface 



