XIV LIST OF ILLUSTRATIONS 



Page 



30. Hippoporidra calcarea Smitt, 1873. A. Ordinary operculum, X 85. 



B. Mandible of an interzooecial avicularium, X 85. C. Opercu- 

 lum of ovicelled zooecium, X 85 140 



31. Holoporella albirostris Smitt, 1873. A, B. Two opercula, X 85, 



showing variations. C. Operculum of a superficial zooecium. 

 D. Mandible of an oral avicularium. E, F. Two mandibles of the 

 interzooecial avicularia showing variations of the lucida. G. Large 

 mandible 142 



32. Holoporella magnifica Osburn, 1914. A, B. Mandible of the small 



zooecial avicularia, X 85. C. An ordinary avicularian mandible. 

 D. Isolated operculum, X 85. E. Operculum, X 85, with attached 

 tentacular sheath. F. Tentacular sheath attached to operculum, 

 X 85. G. Mandible of an interzooecial avicularium with its two 

 pairs of elevator and occlusor muscles grouped in superposed 

 bundles. H. A small avicularium, X 85. I, J. Mandibles of large 

 interzooecial avicularia, X 85 144 



33. Opercula, X 85. A. Holoporella tubulosa, new species. B. Holopo- 



rella subalba, new species. C, D. Holoporella iurrita Smitt, 1873. 

 E-G. Holoporella vagans Busk, 1888. E. Mandible. F, G. 

 Opercula 145 



34. Schizmopora dichotoma Hincks, 1864. Operculum and mandible, X 



85 149 



35. Mamillopora cupula Smitt, 1873. A-C. Three forms of opercula, X 



85 155 



On some terrestrial Isopods in the United States National 



Museum 



By Hans Lohmander 



1. Haplophthalmus danicus Budde-Lund. a, antennula; b, antenna; c, 



•right mandible drawn from Swedish specimen; d, left mandible 

 drawn from Swedish specimen; e, first maxilla; /, second maxilla; 

 g, maxilliped; h, penis 5 



2. Haplophthalmus danicus Budde-Lund. Male: a, first leg; b, seventh 



leg; c, first pleopod; d, second pieopod 7 



3. Detonella papillicornis (Richardson), a, antennula; b, antennula, third 



joint and extremitj' of second joint; c, antenna of male; d, antenna of 

 female; e, lower lip; /, first maxilla, outer lobe; g, first maxilla, inner 

 lobe; h, second maxilla; i, maxilliped 12 



4. Detonella papillicornis (Richardson). Male: a, seventh leg; b, penis; 



c, first pleopod; d-f, second pleopod; g, third exopodite; h, third 

 endopodite; I, fourth exopodite; j, fourth endopodite; k, fifth pleopod. 13 



5. Detonella papillicornis (Richardson), b, plumose seta from the inner 



dorsal surface of the third exopodite of male; c, merus and adjoining 

 parts of the first leg of male, with lamellae; d, dactylus of the 

 seventh leg of male; e, inner margin of the propodus of the first leg__ 15 



6. Detonella papillicornis (Richardson). Female: a, seventh leg; b, first 



exopodite; c, second exopodite; d, third exopodite; e, fourth exopo- 

 dite; /, fifth exopodite; g, second endopodite; h, third or fourth 

 endopodite; i, fifth endopodite; j, left mandible; k, right mandible. _ 16 



