332 Transactions. — Botany. 



innermost smallest ; nerveless. Fruit acrocarpous. Fruit- 

 stalk slender, ^ in. long, inclined, pale. Capsule very small, 

 cylindrie. Being overmatured, neither the operculum, peri- 

 stome, nor calyptra were seen, but the moss is undoubtedly 

 a Trichostomum. It had fruited freely, but insects had 

 destroyed nearly all the capsules. 



Hab. Seams of rocks near Kaikoura. It appears to be 

 rare, as only a small portion was obtained. Collected by E. 

 Brown, January, 1896. 



Named after M. J. Theriot, Directeur de L'Ecole Primaire 

 Superieure du Havre. 



16. T. mokonuiensc, sp. nov. Plate XXXVII., fig. 16. 

 Plants monoecious, small, gregarious, yellowish - green, 



■J in. -J in. high. Branches fastigiate. Leaves small, erecto- 

 patent, lanceolate or linear-lanceolate, subacute, semi-con- 

 volute, slightly incurving at the apex ; margins entire ; nerve 

 slender, continued to the apex. Areola : Upper small, sub- 

 rotund ; lower quadrilateral ; leaves incurved at the apex when 

 dry. Perichcetial leaves erect, smaller than the upper stem 

 ones, lanceolate, acute ; margins entire ; nerve continued to 

 the apex. Fruit acrocarpous. Fruitstalk slender, J in. long, 

 reddish. Capsule small, cylindrie. Operculum narrow, conico- 

 rostrate, two-thirds the length of the capsule. Peristome 

 single ; teeth 16, linear. Calyptra cucullate. 



Hab. On damp mud in the bed of the Eiver Mokonui, near 

 its junction with the sea. Collected by Eobert Brown, Janu- 

 ary, 1898. 



Genus Orthotrichum. 



17. 0. oamaruense, sp. nov. Plate XXXVII. , fig. 17. 

 Plants perennial, monoecious, growing in small dense 



tufts ^in.—|in. high, dark-green above, black below. Stem 

 short, subdichotomously branched. Branches fastigiate. 

 Leaves imbricating, erecto-patent, oblong-lanceolate, acute ; 

 margins recurved, occasionally plain, entne ; nerve slender, 

 keeled, disappearing at the apex. Areola : Upper small, 

 dense ; lower quadrilateral. Perichcetial leaves slightly 

 smaller than the stem ones, erect. Fruit acrocarpous. Fruit- 

 stalk extremely short. Gapswe narrow, elliptic, immersed in 

 the perichsetial leaves. Operculum stout, one-quarter the 

 length of the capsule. Peristome single ; teeth 8, slightly 

 perforated near the apex. Calyptra small, mitriform, pilose. 



Hab. On limestone rocks near Weston, close to Oamaru. 

 Collected by E. Brown, November, 1897. 



18. 0. oamaruanum, sp. nov. Plate XXXVII. , fig. 18. 

 Plants perennial, monoecious, growing in small dense tufts, 



browu above, dark-brown below, fin.— £ in. high, dichoto- 



