THE BURROWING BARNACLES (CIRRIPEDIA: ACROTHORACICA ) 71 



The mantle is sparsely studded with extremely small teeth, especially 

 in the center of each side and along the ventral margin. These teeth 

 are from two- to four-pointed. An attachment knob is present poste- 

 rior to the orificial knob. 



The mouth cirri are biramous on a two-segmented protopod, with 

 four or five and three segments in the anterior and posterior ramus, 

 respectively. 



The mouthparts are typical. The mandible is equipped with three 

 major teeth and a fine-toothed cutting edge. 



The first maxilla has two major teeth, a gap broken by a single 

 bristle, and a cutting edge of several fine hyaline teeth. 



The second maxillae and mandibular palps -are typical. 



The labrum is heavy, with a rounded posterior lip, and scattered 

 dots or bumps over the anterior surface. The lateral wings of the 

 labrum extend into reticulated supporting arms. Behind the apodemes 

 of the first maxillae is another reticulated sheet bearing a pair of 

 projections posteriorly. 



The three pairs of terminal cirri have the following segmentation 

 formula for a single specimen counted: 



Terminal 



cirrus: 12 3 



Ramus: anterior posterior anterior posterior anterior posterior 



Segments: 27 36 42 43 45 46 



The setation of the terminal cirri is typical : On the inner curvature 

 there is a pair of long setae on the distal margin at least four times as 

 long as the segments, with a short bristle between the base of each 

 pair about one-third as long as the segment length; also on the inner 

 curvature there is a pair of shorter setae near the middle of the seg- 

 ment, about as long as the segment. On the outer curvature there is a 

 single (occasionally double) seta at the distal margin of a length about 

 one and a half times the segment length, every one to four segments 

 along the length of the cirrus. 



The caudal appendage is two-segmented and extends, with the 

 bristles, past the joint of the two-segmented protopod of the terminal 

 cirrus. 



The thorax is finely striated on the surface, in a typical manner. 



No male was seen. 



Relationships: It is probable that this species is closely related to 

 Kochlorine floridana Wells and Tomlinson. The opercular armament 

 somewhat resembles this species, and the rest of the structures are 

 typical of the genus. The anchor-hooks are considerably larger in K. 

 anchorella, however, while they are much less numerous and less 

 ornate. 



