58 SUMMARY OF CURRENT RESEARCHES RELATING TO 



former is a millepore-like form, obtained by the ' Challenger' off Api, 

 New Hebrides ; the other formed thin crusts on debris collected near 

 Madeira. 



The genus Minchinella is thus defined : lamellar Lithoninse, with 

 pore-chimneys on one side and oscular chimneys on the other, each with 

 a skeleton of monaxons, triradiates, and quadriradiates ; main skeletal 

 framework formed of large quadriradiates cemented together. Canal 

 system leuconoid. 



For Merlia a new sub-family (Merlinse) is proposed : — Pharetronidse, 

 in which the solid skeletal framework is constructed of vertical main 

 beams of fibrillar cement, from each of which there radiate three vertical 

 flanges to meet similar flanges from other columns, so as to form 

 cylindrical tubes ; the latter are partitioned off by horizontal floors, a 

 honeycomb-like structure resulting. Solid framework without axial core 

 of spicules. In Lithoninae the framework is constructed on the " beton 

 arrne " principle ; in Merlinse the " beton " is not " arine," the axial 

 stiffening of spicules being dispensed with. In Merlia the dermal 

 membrane is supported by tufts of slender tyles and with raphides, and 

 tuning-fork spicules are present. 



Fresh-water Sponges in Scotland." — X. Annandale gives descrip- 

 tive notes on Spongilla lacustris and TaMla pennsglvanka, the only two 

 species that he is sure of as occurring in Scotland. 



Protozoa. 



New Rhizopods. f— E. Penard describes three new species from 

 Swiss lakes — Difflvgia histrio, Cyphoderia myosurus, Heliopera sabavda, 

 Difflugia truncata % from a marsh near Geneva, which, when it encysts, 

 forms a diaphragm pierced in the middle and raised on a collaret. 



Foraminifera from Coast of Delos.§ — H. Sidebottom reports on 

 recent Foraminifera from Delos, and describes two new species of 

 SpirilUna and two of Discorbina. 



Peridinians of the Bay of Hougue.||— E. Faure-Fremiet gives a 

 descriptive account of this part of the plankton, establishing "several 

 new species— Glenodinium (1), Peridinium (5), a genus which he divides 

 up into groups of species, and Gonyaulax (1). He also deals with some 

 of the Ciliata, including Amphorellajorgenscni sp. n. 



New Flagellate in Congo Flies. IF— E. Roubaud found in the gut 

 of Pycnoxoma putorium a Flagellate which he regards as a new species 

 of Leptomonas (L. miraUlis). It occurs in three forms : (1) giant forms 

 (often over 200 //,), drawn out posteriorly into a long filament ; (2) minute 

 young forms ; and (3) trypanosome-like forms. 



* Journ. Linn. Soc. (Zool.) xxx. (1908) pp. 2-14-50. 

 t Rev. Suisse Zool., xvi. (1908) pp. 441-71 (1 pi.). 

 I Tom. cit., pp. 472-82 (1 pi.). 



§ Mem. and Proc. Manchester Lit. and Phil. Soc. lii. (1908) pp. 1-28 (5 pis.). 

 !| Ann. Sci. Nat. (Zool.) vii. (1908) pp. 209-40 (2 pis. and 22 figs.). 

 t C.R. Soc. Biol. Paris, lxiv. (1908) pp. 1106-8 (11 figs.). 



