THE BURROWING BARNACLES (CIRRIPEDIA: ACROTHORACICA) 123 



Survey, but as its offices have changed more than once since 1925, 

 and it never has had any proper building suitable for storage of speci- 

 mens, I should imagine these particular specimens are lost." A letter 

 from the Fisheries Survey confirmed that they were lost, and that no 

 local workers have been able to locate the species since its description. 



Reference specimens are deposited as follows. Principle reference 

 specimen set: USNM 122624, from the type-host and locality, Turbo 

 sarmaticus from False Bay, Cape Province, South Africa. Additional 

 material: Aust, BPB, Brit, Belg, BA, CA, Dublin, Mex, Paris, Seto, 

 SFSC, UCT, Vict. 



Dimensions: The size of the female averages (of five specimens) 

 2.34 mm long X 1.47 mm wide X 1.25 mm thick, with an aperture 

 length, measured straight across the body from both ends, of 0.43 

 mm. The burrow aperture averages 0.33 X 0.25 mm and is some- 

 what pear shaped, with a short point at the attached end. Hundreds 

 of specimens were obtained, and dozens examined. 



The lips of the mantle aperture are of the typical brick red color 

 in life, and a light brown when preserved. Each side is split by a 

 deep notch about one-third the distance from the dorsal end toward 

 the attached surface. Relatively light teeth and hairs arm the edges 

 of the apertural lips. An infolded velum bearing the convoluted 

 lamellae extending into the uniformly haired comb collar is found at 

 the ventral end of the aperture. Heavy reinforcing bars are present. 

 One extends dorsally toward the attachment area from the dorsal 

 end of the aperture, and a pair of lateral bars extend down each side 

 of the mantle from the general area of the apertural notch. These 

 lateral bars — much lighter and less well armed with teeth than is 

 typical of the genus— do not terminate posteriorly in a hillock of 

 teeth or spines. A row of teeth lies alongside the lateral bar, and 

 another row frequently parallels the lateral bar, but at some distance 

 from it. One specimen was found with two lateral bars on each side, 

 and it was assumed that this specimen was approaching a molt stage. 

 Several loose rows of single spines are found on the external mantle 

 surface posterior to the aperture on the ventral two-thirds of the 

 mantle. 



The mantle is studded with small and uniformly spaced teeth, 

 almost all of which are bifid, the exceptions being primarily the row 

 of curved spines in a band around the periphery of the mantle in 

 the saggital plane of the thorax. 



The mantle musculature consists of transverse and longitudinal 

 bands typical to the order. 



The attachment area is obscured by layers of cemented exuviae 

 forming the typical horny disk, upon which numerous males are 

 usually found. 



327-241 O - 69 - 9 



