NO. 1 DAWSON : MARINE RED ALGAE OF PACIFIC MEXICO 99 



Haematocelis rubens J. Agardh 

 Plate 7, fig. 7 



J. Agardh, 1852, p. 497; Newton, 1931, p. 446, fig. 267 A-D; 

 Batters, 1897, p. 439. Haematophloea crouani Crouan & Crouan, 1858,, 

 p. 73, pi. 3, fig. 6 a-c. 



Thallus crustose, epiphytic, epizoic or semi-saxicolous, to 6 cm. in 

 breadth, firmly attached to the substrate or sometimes a little loose, deep, 

 dull red, 180-360 /n thick; vegetative layer consisting of dichotomously 

 branched filaments which are at first horizontal then ascending, erect 

 and parallel toward the upper surface, the cells of the lower part much 

 elongated, 15-27.5 //, long, 5,0-7.5 jx wide, those of the erect filaments 

 5-10 II long and about 5 /a broad ; tetrasporangial nemathecia super- 

 ficial, about 60-70 /x deep, bearing regularly zonate, blunt-fusiform 

 tetrasporangia 37-47 /x long, 10-12.5 ju. broad, amid densely packed cyl- 

 indrical paraphyses 3-5 /t in diameter and of about 5-7 isodiametrical 

 to elongate cells ; sexual reproduction not observed. 



Type: Holotype not designated but probably represented by the 

 original specimen sent to Agardh by the Crouan brothers in the Agardh 

 herbarium, University of Lund, Sweden. 



Type locality: On calcareous rocks, Brest, France. 



Pacific coast distribution: California — D. 356, on rocks at 

 "the caves," La Jolla Bay, Jan. Pacific Baja Calif., Mexico — D. 287, on 

 a sponge, 5 miles south of Punta Descanso, Jan.; D. 8816, on a sponge, 

 Punta Baja, Jan. ; D. 8732, on a sponge in drift, Punta San Quintin, 

 Jan.; D. 6715, on holdfast of Eiseniaj growing around small barnacles, 

 Punta Entrada, Isla Magdalena, Mar. 



Gruoriopsis mexicana sp. no v. 



Plate 10, figs. 11-14 



Thallo tenui crustoso, 80-150 fi crasso, strato unico cellularum hypo- 

 thalli 12-20 ju, longo, 8-10 /i alto, textum sustinente filamentorum teri- 

 tum vel exigue clavatorum, ramosorum, directorum pressu facile dis- 

 tantium; tetrasporangiis 70-80 fi longis, 16-20 /x latis, in textu superiore 

 thalli dispersis, in filamentis baud distinctis 2-6 cellularum; carposporis 

 18-20 fx diametro, in catenis brevibus, ramosis, plerumque 4 sporarum. 



Thallus small, thin, crustose, 80-150 (200) ja thick, consisting of a 

 single basal layer of somewhat horizontally elongated cells 12-20 (24) 

 /x long and 8-10 (12) fj. high and a tissue of vertical filaments arising 

 from it, attached by a thick hyaline gelatinous film beneath the basal 



