94 Mr H. Goodsir on the Sexes of the Cirripeds, <$•(?. 



tinated, after the same manner as the organs at the bases of 

 the first pair of antennae. These are, doubtless, for the pur- 

 pose of retaining a firm hold of the female during the act of 

 copulation. 



The external organs of generation are situated at the base 

 of the last pair of feet ; they are articulated, and a slender 

 vessel, the vasa deferens, runs from the base of each round to the 

 dorsal aspect of the segment to the testicle, which is probably 

 situated in the soft portion of the body. (Plate III., Fig. 6, b). 



The soft portion of the body consists of three parts ; these 

 are separated by means of neck-like contractions, which divide 

 the portion into three equal sections. The first of these is 

 trilobate, and has been already described. The second has two 

 arm-like extremities arising from each side of it, representing, 

 as it were, anterior extremities. These run backwards, and 

 taper very gradually to a point. The third or last division of 

 this part of the body has also two extremities of the same ap- 

 pearance as the last, together with a third tail-like extremity, 

 which arises from the mesial line, and lies between the two last 

 described. 



In looking over the above description, we cannot fail to see 

 the points of affinity between it and the larva described by Mr 

 J. V. Thompson, and which are of considerable importance, 

 such as the pedunculated eyes, &c. It has also many connect- 

 ing points with other Crustacea — to the Lernseas by means of 

 its soft fleshy body, and to the higher crustacea by means of 

 its pedunculated eyes and antennjE. 



From the researches of Mr Thompson relative to the meta- 

 morphosis of the Cirriped, there can be little doubt of the re- 

 lation which they bear to the Crustaceans. There was only one 

 point which could make this relation at all doubtful, viz., the 

 hermaphroditic character of the Cirriped, seeing that one of 

 the great fundamental distinctions between the higher and 

 lower Articulata, is the separation of the sexes in the former, 

 and their combination in the latter. From this circumstance, 

 it would have been impossible to have admitted of the junction 

 of the Cirriped and Crustaceans, which had heretofore been con- 

 sidered as belonging to two separate classes. 



Looking upon the above described* animal, then, as the male 

 of the Balanus, we completely break down this only objection, 



