82 UNITED STATES NATIONAL MUSEUM BULLETIN 296 



The first maxilla has the usual two strong teeth, a gap, and a bristled 

 margin with thin hyaline teeth. The second maxilla, labrum, and 

 mandibular palps are typical. 



No body processes could be seen, but these could be missed in these 

 specimens. 



An orificial velum is probably present (figure 18a). The comb collar 

 is strongly developed, with each convolution of the membrane heavily 

 thickened basally and projecting distaUy into a fine, membranous 

 process. 



Berndtia nodosa Tomlinson, 1967, page 101 



Figure 19 



Diagnosis: Berndtia with opercular plates studded over their outer 

 surfaces with numerous blunt, heavy, nodular teeth; margins of aper- 

 tural lips bearing over thirty simple teeth; no well-developed conical 

 body processes. Males adhere to female exuviae of the attachment 

 disk as well as the wall of the burrow. 



Distribution: All material is from one piece of the coral Psam- 

 mocora contigua (Esper) from Singapore, from the University of 

 Singapore collection. 



Type-material: Holotype: USNM 113310. Paratypes: National 

 Museum of Singapore 1305, Brit, SFSC, CA, Seto. Additional ma- 

 terial: Aust, BPB, Belg, BA, Dublin, Mex, Paris, Vict. 



Dimensions: Average of six specimens 2.88 X 1.44 mm, with 

 aperture of 1.08 mm. 



The mantle is composed of a typical bag-like covering of the body, 

 with a narrow but heavy horny attachment disk representing ce- 

 mented exuviae where the animal is cemented to the burrow. The 

 exterior of the mantle is studded with many fine teeth used in abrad- 

 ing the burrow in the coral. These may have from one to four points, 

 unlike B. purpurea, which does not have four-pointed teeth. Around 

 the aperture of the mantle these fine teeth are interspersed with 

 small hairs and scale-like ridges common in the order. Muscle bands 

 are conspicuous, particularly the longitudinal bands on the ventral 

 lateral surface. 



The mantle has a heavy attachment disk. The exterior of the 

 mantle has many abrasive teeth with from one to four points. 



The operculum is evenly studded over the external surface with 

 heavy teeth which appear superficially blunt, but may have a fine 

 rosette of extremely small nodules around the outer margin. An 

 orificial velum of moderate size extends from the typical comb collar. 

 The ventral apertural interior has a brush of fine hairs. No orificial 

 knob is present. 



