92 Mr H. Goodsii' on the Sexes of the Cirrtpeds, ^c 



attached near to the external oviducts, and in some cases up- 

 on that part of the body in which the ovary is situated, as in 

 Anchorella uncinata. This being the case, it was thought that 

 the male of the Balanus would be found in an analogous posi- 

 tion. Under this supposition the ovipositor was carefully ex- 

 amined in a very great number of cases, at all seasons of the 

 year ; but nothing in the shape of a separate animal could be 

 observed. 



During the beginning of the month of May (1843), how- 

 ever, while engaged in examining specimens of the Balanus 

 batanoides, in the hopes of still finding my supposition correct, 

 a small fleshy body was observed, not on the ovipositor, but 

 on the body of the animal, immediately over the ovaries. This 

 body was adhering with a considerable degree of firmness, and 

 on being placed in a separate vessel of sea-water by itself, it 

 was found to be alive, and to bear a great resemblance in its 

 external appearance to a Lerna?a. 



On making a more minute examination, the anterior part 

 of the body was found to be minute and crustaceous, consist- 

 ing of six articulations. The eyes are two in number, black, 

 shining, and pedunculated. The antennae are four in number, 

 and are generally in constant motion. Owing to the apparent 

 disproportion of the two divisions of the body, this animal is 

 entirely unfitted for locomotion ; but the crustaceous or ante- 

 rior division is constantly moving backwards and forwards. 



We shall proceed, then, to describe in detail this animal, 

 being of opinion that it cannot be other than the male of the 

 Balanus. (Plate IV. Fig. 10.) 



The whole animal is of a straw colour, the anterior or crus- 

 taceous portion being of a lighter shade. The body, as already 

 stated, consists of two parts, an anterior and a posterior ; 

 the former of which is minute, crustaceous, and composed of 

 six articulations ; the latter is unarticulated, large, fleshy, lo- 

 bulated, and contractile. It has also a number of fleshy 

 extremities, which apparently represent feet. A long, fleshy, 

 tail-like appendage also arises from the mesial line posteriorly. 

 The anterior part of this portion of the body is trilobate, and 

 projects above and beyond the crustaceous portion of the body, 

 altogether concealing it from view when the animal is lying 

 in the natural position. 



