160 



PROCEEDING'S OF THE NATIONAL MUJSEUM. 



VOL. XXXI. 



Cat. No. 162507, U.S.N.M., one specimen from Dr. H. von Ihering, 

 collected at Alta Vera Paz, Guatemala. The latter is decidedly more 

 oliese than those from Campeche. The following table gives a list of 

 measurements: 



Measurements of Microceramus eoncisus. 



EXPLANATION OF PLATES. 



Plate III. 



124. 



Fig. 1. Anisospira (Dissoiropis) stearnsi. Length 30 mm. p. 113. 



2. Holospira {Liostemrna) yucatanensis. Length 18.1 mm. .p. 143. 



3. Anisospira {Dissofropis) blandi. Length 33.7 mm. p. 114. 



4. Holospira {Holospira) infanta. Length 9.7 mm. p. 129. 



5. Holospira {Holospira) painteri. Length 8.4 mm. p. 130. 



6. Holospira {Haplocion) tantalus. Length 10.2 mm. p. 147. 



7. Ca'locentrum pittieri. Length 60.7 mm. p. 116. 



8. Holospira {Liostemrna) durangoensis. Length 34.5 mm. p. 142. 



9. Eucalodium decollatum guatemalensis. Length 60.9 mm. p. 110. 



Plate IV. 



Fig. 1. Holospira {Bostriclioccntrurn) goldmani. Length 14.9 mm. p. 136. 



2. Holospira {Bostrichocentrtun) tamaidipensis. Length 12.5 nun. p. 139. 



3. Epirobia coahuilensis. Length 10.8 mm. p. 121. 



4. Holosjnra {Holospira) goldfassi anacachensis. Length 12 mm. 



5. Holospira {Holospira) oaxacana. Length 17.5 mm. p. 132. 



6. Holospira {Holospira) palmeri. Length 13.7 mm. p. 128. 



7. Holospira {Haplocion) lichenoj^hora. Length 15.2 mm. p. 146. 



8. Epirobia {I^ropilsbrya) nelsoni. Length 15.2 mm. p. 122. 



9. Holospira {Holospira) mexicana. Length 17.4 mm. p. 127. 



10. Holospira {Stalactella) rosei. Length 12.2 mm. p. 151. 



11. Coelocentrum pittieri guatemalensis. Length 41.8 mm. p. 117. 



12. Holospira { Bostrichocentrum) hidalgoensis. Length 20.5 mm. 



13. Holospira { Haplocion) townsendi. Length 16 mm. p. 145. 



14. Holospira {Coelostemma) herrerse. Length 19 mm. p. 150. 



Plate V. 



HendersonieJla palmeri Doll. 



All figures magnified two and one-half diameters. 

 Fig. 1. View from below, p. 153. 



2. Profile. 



3. Specimens with the wliorl l)roken away to show the internal spiral lamina. 



4. View from above. 



P' 



138. 



