100 BALANIDjE. 



cirrus : in Octomeris brunnea, the un articulated support is 

 much elongated, being as long as the pedicel of the sixth 

 cirrus, in which respect this organ resembles that of Ibla 

 quadrivalvis, and of no other Cirripede. From the attach- 

 ment of the penis at the posterior end and on the under side 

 of the anus — from the position of the caudal appendages 

 (where such occur) over the anus — from the position of 

 these same appendages in the pupa — and lastly, from the 

 position of the papilla-like penis in the abnormal Proteolcpas, 

 I infer that, homologically, the penis is situated at the apex 

 of the abdomen, on its ventral surface ; and that, conse- 

 quently, this organ cannot be considered as the abdomen 

 itself in a modified condition. 



Female Organs. — I have scarcely anything to add to the 

 statements in my former volume. These organs consist of 

 the true ovaria, or glandular bodies seated on each side, not 

 far from the basal edge of the labium ; of the main or un- 

 branched ovarian ducts; and of the (PI. 25, fig, l,y) ova- 

 rian branching tubes and caeca. I traced distinctly in 13a- 

 lanus, Tetraclita, and Coronula, the two main ovarian ducts, 

 running from within the prosoma to the layer of inosculat- 

 ing, branching, ovarian caeca* which overlie the basis. In 

 Coronula diadema one of these main ducts was ^th of an inch 

 in diameter. Though I traced these ducts near to the grape- 

 like, glandular masses,f which I cannot doubt are the true 

 ovaria, I did not succeed in tracing them into actual con- 

 nection. As in the Lepadidae, these ovarian glands lie on 

 the sides, near the basal margin of the labrum, and almost 

 under, but rather to the outside of the antennular nerves. 

 The branching and inosculating ovarian caeca form a layer, 

 which corresponds with the mass filling up the peduncle in 

 the Lepadidae. In Tetraclita they do not cover the whole 

 basis, but are confined to the circumference ; they, however, 



* These are well described in Lepas, by R. Wagner, in c Midler's Archiv,' 

 1834, p. 4G7. Von Siebold, I observe, refers to Burmeister as the first author 

 who discovered the ovarian caeca within the peduncle; I had thought that M. 

 Martin St. Ange had a prior claim. 



| these are obscurely figured by Karsten ('Nov. Act. Acad. Caes. Nat. Cur., 

 1845, PI. 20, fig. Id) as salivary glands; they were so considered by Cuvicr 

 and M. Martin St. Ange : I may observe that salivary glands have not been 

 positively recognised in any Crustacean. 



