RONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND. 22. N:0 8. 39 



therefore not worth while to enter into details about the differénces between the Spitz- 

 bergen and New Zealand forras. 



12. S. subdenticulatum nov. spec. Tab. 4, fig. 14. 



? Stanrastrum (avicula?) Mask. N. Z. Desm. p. 316, tab. 12, fig. 31, 32. 



S. incisura mediana profunda caxinseformi; semicellulaä ellipticas, apicibus aculeis 

 binis brevibus divergentibus ornatis; e basi visa? seriebus granulorum inter angulos et 

 isthmum; e vertice visa' triangulares lateribns raedio levissirae concavse, angulis rotundato- 

 obtusis aculeo brevi munitis, inträ marginem inter angulos seriebus binis granulorum ar- 

 cuatis; granida seriei exterioris singula, interioris bina, ut videtur (revera verruca» emar- 

 ginatae ut descript). 



A Staur. Oxyrhyncho Roy & Biss. Jap. Desm. p. 238, tab. 268, fig. 6 cujus varietas 

 haec species esse fortasse debet, prsecipue differt incisura mediana interne angustiore, semi- 

 cellulis paullo longioribus, aculeis angulorum binis. A Staurastro denticulato membranå 

 granulis (nullis denticulis) et verrucis emarginatis alio modo dispositis ornatå abhorret. 



Long. 40 ,m = lat. sin. acul. 



Auckland (70). 



13. S. Dickiei Ralfs Brit, Desm. p. 123, tab. 21, fig. 3. 



{> parallelum nov. var. Tab. 4, fig. 15. 



Minor; aculei breviores non convergentes, sed paralleli. 



Long. 23 — 24 ,«; lat, sin. acul. 23 — 24 /u; lat, c. acul. 27 ,«; lat, isthm. 7 fi. 



Dunedin (25); Auckland (70). 



If the semicells had been more than t\vice as long, as the) 7 are broad, I should have 

 considered it to be a form of St. mucronatum (between fig. 5 b. and c. in Ralfs Brit, 

 Desm. tal). 20). (Cfr. Didymidium (Staur.) erlangense Reinscii Algenf. tab. 11, tig. 4 Ii, 

 non Spec. gen. Alg. Fung. tab. 23, fig. C. ii, 1). 



14. S. dejectum Bréb. (in Menegii. Syn. Desm. p. 227; St, dejectum a Ralfs Brit, 



Desm. p. 121, tab. 20, fig. 5 a). 



(i paténs nov. vai\ Tab. 4, fig. 16. 



Forma aculeis (parvis) patentibus (divergentibus, non parallells), semieellulis isthmo 

 non elongato connatis. Cum figura superiora sinistra tab. 5, fig. 51 in Denot. Desm. 

 Ital. fere prorsus congruit. 



Long. 23 ,«; lat. sin. acul. 24 ,«; lat, isthm. 6 ,«; long. acul. ad 2,5 u. 



Dunedin (25). 



15. S. corniculatum Lund. (Desm. Snec. p. 57, tab. 3, fig. 23). 



fi variabile nov. var. Tab. 4, fig. 17. 



Anguli semicellukv paullo minus protracti, interdum acutiusenli (vel paullulo mucro- 

 nati vel obtusiusculi), latera medio levissirae concava^; semicellula? e vertice visa? lateribns 

 medio convexis sed levissirae. 



