ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 605 



and distribution. Ceratodktyon sponf/iosu?n Zan. grows in syml)iosis 

 with a sponge. The slender multicelhilar ])ranches are anastomosed 

 into a dense network ; the sponge grows in the interstices, and forms 

 an investing coat around each segment of the thallus. Thamnodonium 

 Tissotii is also associated with a sponge ; the thallus consists of large 

 foliaceous segments of parenchymatous structure, and both surfaces are 

 clothed with a thin sponge, which is penetrated by moniliform algal 

 filaments. The tetraspores of Coral! opsis Urvillel and the cystocarps 

 of lienrymcjiiafraxinifoUa.Tprevioxisij unknown, are described. Digenia 

 simplex, Amansia pumila, Vidalia fimhriata, are of interest in respect of 

 their distribution. All seven species were collected at Dunk Island by 

 E. J. Banfield. 



Crouan Alg'86.* — C. A. Picquenard continues his report on the 

 algal material collected by the brothers Crouan. The Floride^e, of 

 which he gives a list, are less rich in species than would have Ijeen 

 expected. It is also surprising that in their herbarium there is no set 

 of the Guadeloupe alga3 collected by Maze and Schramm and named by 

 the brothers Crouan. 



In a preceding paper the same author describes under the name of 

 Guerinia callithamnioides the Melobesia callithamnioides of Crouan. 

 Foshe, who examined the type, considered it merely a young Rliodo- 

 chorton ; but Picquenard considers that the differences he has observed 

 are sufficient to constitute a new genus. The fructification is unknown, 

 and Guerinia has therefore a doubtful position. 



Belgian AlgSB.f — W. Conrad and H. Kufferatte give a list of the 

 algological flora of Belgium. Sixteen genera and forty species are new 

 to Belgium, and a hundred species are new records for the different 

 provinces. The catalogue comprises 371 species, of which 90 are 

 diatoms. 



Algae of Tripoli and Cyrenaica.J— Gr. B. de Toni and A. Forti 

 publish a contribution to the algological flora of Tripoli and Cyrenaica ; 

 founded on collections by Vaccari of the Italian navy from Tobrouk 

 and Benghazi, and by A. Trotter from Tripoli. The principal interest 

 of the paper lies in the list of diatoms, since no list has ever before been 

 published for the Tripoli coast. Several of the larger algai are also new 

 records for the region. The numbers of species recorded are : Florideae 

 33 ; Fucoideffi 7 ; Chlorophyce^ 14 ; Characete, Glaucophycete, Myxo- 

 phycese, Peridinieae one each ; Bacillarieee 156. 



Red Sea Algae. § — R. J. Harvey-Gibson and M. Knight publish a 

 fist of 48 species of marine alga3 collected by Crossland chiefly 

 from Khor Dongolab in the Sudanese Red Sea. Of these, 36 are ad- 

 ditions to a previous list. The authors record and figure vegetative 



* Trav. Sci. Labor. Zool. Physiol. Marit. Concarneau, iv. (1912) No. 4, 105 pp. ; 

 No. 3, 5 pp. See also Bot, Centralbl., cxxiii. (1913) p. li2. 

 t Bull. Soc. Roy. Bot. Belgique, xlix. (1912) pp. 293-385. 

 X Ann. Inst. Oc6anogr., v. fasc. 7 (1913) 56 pp. 

 § Journ. Linn. Soc. (Bot.) xli. (1913) pp. 305-9 (figs.). 



