2-16 MESSES. AV. WEST AND Q. S. WEST ON 



Var. PROTUBEKANS, 11. vai\ (PL XIY. fig. 35.) [C Rammeri var. " with inflated sides," 

 Wolle, Desm. U.S. pi. xviii. figs. 36-38.] Var. semicellulis a yertice visis tumore 

 mcdiano utrobique. Zygospora globosa aculeis simplicibus (multo latioribus ad 

 basin) instructa. 



Long. 35 t-i ; lat. 21-5 /u ; lat. isthm. 75 ^u ; crass. 12-5 ^ ; diam. zygosp. sine spin. 30 /u, 

 cum spin. 46 ^. 



Wolle figures a zygospore of this variety with mm\Qvo\\s furcate spines {I. c. fig. 38). 



03. CosMAEiUM GEANATUM, Breb. in Ralfs, Brit. Desm. p. 96, t, 32. fig. 6. 



Var. OCELLATUM, nov. var. (PL XV. fig. 19.) Var. semicellulis scrobiculo singulo in 

 centro, a latere visis scrobiculo singulo utrobique supra medium; membrana forte 

 punctata. 

 Long. 44 iu ; lat. 28 ^ ; lat. isthm. 6 n ; crass. 17 n. 



Compare with (?. pse?i(^o^raw«iMm, Nordst. in Vidensk. Meddel. 1869 (1870) p. 211, t. 3. 

 fig. 27. 



01. C. IN^EQUALIPELLICUM, West & G. S. Wcst, ill Trans. Linn. Soc. ser. II., Bot. v. (1895) 

 p. 54, pi. 6. figs. 28, 29. 

 Long. 24-25'5 ^; lat. 17-19 ^ ; lat. isthm. 5 /u ; crass. 10"5 n. 



65. C. Baileyi, Wolle Desm. U.S. p. 64, pi. xvi. figs. 17, 18. (C. depressum, Bail, non 

 Naeg.) 



Var. MAJOR, nov. var. (PL XIV. fig. 36.) Var. duplo-major, profundius constrictum, 

 semicellulis subangalaribus, lateribus rectioribus ; a vertice visis elliptico-rhom- 

 boideis polis subrotundatis ; pyrenoidibus binis. 



Long. 69-73 ^; lat. 76-79 ^ ; lat. isthm. 17"5 /u ; crass. 32-5 fx. 



We consider that this agrees sufficiently well with the above species, although it is so 

 much larger, is somewhat angular, and has a narrower isthmus. The plant has two 

 distinct pyrenoids in each semicell, though Wolle in his remarks under C. ohsoletunii 

 Eeinsch, leaves you to infer that C. Baileyi has but one. This variety can be compared 

 with C. circulare Eeinsch (Algenfl. Franken, p. 108, t. 10. fig. 2). It may also be 

 the C. obsoletum, Wolle (Desm. U.S. p. 64, p. 49. fig. 12), which certainly does not 

 agree wdth C. ohsoletum, Reinscli. 



m. C. PSEiTDOPYiiAMiDATUM, Luud. Dcsm. Succ. p. 41, t. 2. fig. 18. 

 Long, zygosp. i2-5-44 ,u ; lat. zygosp. 32-34-5 ^u. (PL XV. fig. 2.) 

 Several zygospores of this w^ere noted and they were all elliptical, the surface being 



covered witli !,n'[]^e rounded warts; Wolle's figure is that of a circular one. 



67. C. DOLIFOEME, nov. sp. (PL XV. fig. 16.) C. parvum, subduplo longius quam latins, 

 modice constrictum, sinu angusto-lineari extremo subampliato ; semicellulie truncato- 

 pyramidatae lateribus levissime convexis et basin versus levissime retusis, prope 

 apices leviter constrictis, apicibus retusis ; a vertice visa? late ellipticai ; a latere visye 

 ovato-ellipticae ; membrana sparse et delicatissime punctulata. 

 Long. 33 M ; lat. 18 u ; lat. isthm. 9 ^i ; crass. 10 ^u. 



