MALE. 189 



much lower down than is usual (PI. IV, fig. 8d), namely, 

 at the length of the pedicel of the first cirrus beneath its 

 basal articulation. 



Ge?ierative system. — The specimens here described, of 

 which I examined six, are exclusively female ; they have 

 no trace of the external, probosciformed penis, or of the 

 two great vesicuke seminales, or of the testes : on the other 

 hand, the ovarian tubes within the peduncle are developed 

 in the usual manner, and owing to the large size of the ova, 

 are of large diameter, and hence very distinct : I detected, 

 also, the true ovaria at the upper edge of the stomach. 



MALE. Plate V, figs. 1 — 8. 



Of the above-described Ibla Cumingii I dissected six 

 specimens, four from the Philippine Archipelago,* and 

 two from the Burmah Empire, and none of them, as we 

 have just seen, possessed the probosciformed penis, the 

 vesiculse seminales, or the testes, so conspicuous in other 

 Cirripedes ; on the other hand, all were furnished with 

 the usual branching ovarian tubes and sometimes with 

 ova, and consequently were unquestionably of the female 

 sex. Within each of these specimens there was attached 

 within the sack, in a nearly central line, at the rostral 

 end, (PI. IV, fig. 8 a\ h, magnified five times,) a flattened, 

 purplish, worm-like little body, projecting about the ^th 

 of an inch : in one of the six individuals, there was a 

 second similar little creature attached at the carinal end 

 of the sack. Before giving the reasons which I think con- 

 clusively prove that these little animals are the Males of 

 the ordinary form of the Ibla Cumingii, it will be con- 

 venient to describe their structure in detail. 



The whole consists of a long, much flattened peduncle, 

 separated from the mouth and thorax by an oblique fold, 

 (PI. V, fig. 1 k, b), which is conspicuous on the dorsal 



* I am deeply indebted to the liberality and kindness of Mr. Cuming, in 

 allowing me to cut up four specimens of this new species ; and to Dr. Gould, 

 of Boston, TJ. S., for the examination of the Burmese specimens. 



