ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
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simplicia articulata in scaphidiis infra superficiem excavatis, per totam 
frondem dispersis, collectae. 
New Genera of Algae.* — In a collection of freshwater Algae found 
growing on human skulls obtained from the Melanesian Islands, Prof. 
A. Borzi finds a large number of new species and the following four new 
genera : — 
Loriella, a genus of Stigonemaceae. Thallus exiguu^, caespitoso-floc- 
cosus, e pilis rigidis fragilibus repetite dichotome ramosis dense 
aggregato-fastigiatis constitutus ; vegetatio terminalis, definita, cellulae 
apicales repetita bipartitione longitudinali in ramulos evolutae, ramuli 
breves, recti, in statu juvenali basi vagina communi inclusi, deinde 
omnino liberi et erecto-patentes ; vaginae sat crassae, granulis calcareis 
baculiformibus dense farctae et fragilissimae ; cellulae elliptico-depressae 
aut subquadratae ; heterocystae solitariae ad apices vel ad basin ramulorum, 
sphaerico-depressae, cellulas vegetativas aequantes; sporae globosae aut 
ovales vel ellipticae, articulis vegetativis paullo majores, multi seriatae, 
olivaceo-fuscae, episporio laevi, tenui. 
Entodesmis, a genus of Phaeophyceae. Cellulae oblongae aut ellipticae, 
utroque polo obtusato-rotundatae, 4-8-16 intra integumentum commune 
gelatinosum achroum amplum lateraliter approximatae, et familias 
tabulatas, cubicas aut fasciaeformes liberas, v. in stratum indefinitum muco 
amorpho involutas, effigientes ; chromatophoro unico parietali laminae- 
formi ; divisio vegetativa saepius ad unam directionem, nonnunquam ad 
duas v. tres directiones ; multiplicatio agamica zoosporis solitariis v. 
binis intra cellulas vegetativas omnino immutatas evolutis, ciliis duobus 
inaequalibus ocello laterali rubro instructis. 
Pleurothamnion , a genus of Ctenocladiaceae. Tballus e filamentis 
articulatis, crebre ramosis, saepe calce induratis, et in caespitulos densis- 
simos pulviniformes aggregatis, constitutus ; articuli vegetativi omnes 
ramigeri ; chromatophoro unico amplo parietali, pyrenoide amylifero 
instructo ; ramuli primarii deeumbentes, secundarii adscendentes v. 
erecti ; ultimi omnes ex articulo singulo sursum egredientes et regu- 
lariter secundatim dispositi ; zoosporangia ovalia, obovalia, v. ellipsoidea, 
ex articulorum vegetativorum repetita bipartitione transversa etiamque 
longitudinali procedentia ; zoosporae 4-8 in quoque zoosporangio, ovales, 
rostro brevi, ciliis binis, ocello rubro laterali praeditae ; articuli vegetativi 
in statum palmelloideum transeuntes ; status sexualis ignotus. 
Polychloris, a genus of Botrydiaceae. Algae eximiae symbioticae, intra 
corpus Amoebae vigentes, cellulis globosis v. mutua pressione angulato- 
rotundatis, membrana tenui laevi, chromatophoris numerosis minutis disci- 
formibus, pyrenoidibus carentibus ; divisio vegetativa ad tres directiones 
alternans ; cellulae omnis generationis conformes, aliae in statu vegeta- 
tivo perdurantes, aliae zoosporangia efficientes ; zoosporae 8-16 in quoque 
zoosporangio, per porum lateralem libere examinantes, ovales, rostro 
brevi hyalino, cilio unico et chromatophoris 3-paucis instructae ; cystae 
cellulis vegetativis conformes, sed membrana crassiuscula donatae. 
Abnormal Growth of Spirogyra.f — Miss Emily L. Gregory describes 
a malformation produced in cells of a Spirogyra, apparently by the 
* La Nuova Notarisia, iii. (1892) pp. 35-53. 
f Bull. Torrey Bot. Club, xix. (1892) pp. 75-9 (1 pi.). 
