THE BURROWING BARNACLES (CIRRIPEDIA: ACROTHORACICA) 133 



P^ NO PENETRATION, NO MALES. 

 [yij WITH ■■ WITH " 



.5 6 7 8 9 1.0 I 2 3 4 1.5 6 7 B 9 20 I 2 3 4 



SIZE OF APERTURE IN MILLIMETERS 



Figure 36. — Trypetesa lateralis Tomlinson, 1953, from Tegula shells from Moss Beach, 

 California: a, female viewed parallel to shell surface, external mantle flap {e, m, f) pene- 

 trates entirely through shell; b, viewed perpendicular to shell surface, horny knob {h, k) 

 evident; c, sizes and numbers of females with and without associated males. 



Type-material: Holotype: USNM 93450. Paratypes: CA 9857; 

 Allan Hancock Foundation, University of Southern California, 

 Los Angeles; University of California Museum of Paleontology, 

 Berkeley, Calif. 32960; Indian Zoology Society, Calcutta; Seto; 

 University of Otago, New Zealand; Goteborg Museum, Sweden; Brit; 

 University of Nancy, France; Plymouth Laboratory, England. 

 Additional material: Aust, BPB, Belg, BA, Dubhn, Mex, Paris, 

 SFSC, UCT, Vict. 



This species has been described in two papers (Tomlinson, 1953, 

 1955) and will not be repeated here. 



