210 UNITED STATES NATIONAL MUSEUM BULLETIN 251 



Figure 94. — Microcosmus exasperatus Heller: Specimens from Amoy: a, left half of mantle 

 body of 35 mm. specimen, inner side (USNM 11523); b, right half of same; c, left half 

 of mantle body of 25 mm. specimen, inner side (USNM 11704); d, right half of same; 

 ^, dorsal tubercle of same specimen;/, left half of mantle body of 13 mm. specimen, 

 inner side (USNM 11526); g, right half of same; h, dorsal tubercle of same specimen. 



