Bibliographical Notices, 525 



surface ; with thick (10 /i) chitinous inner shell and a single 

 layer of amphidisks embedded in a vesicular layer. 



Spicules : slender oxeas (fig. 3) 288x8 yu., curved, attenu- 

 ating gradually, smootli or finely and sparsely spined; tornote 

 oxeas (figs. 4, 5) 240 x 12 /i, smooth or finely spined. 



Gemmule spicules: amphidisks (figs. 6-8) 35*6 /i lo'ig, 

 shaft 4'3 fi thick, smooth or with one or several spines ; 

 diameter of deeply incised disks 24*3 fi ; with a knob at 

 centre of disk. 



Numerous developmental forms scattered in the tissues of 

 the sponge. 



Hab. Valkenberg Vlei, near Cape Town (/. Stuart 

 Thomson) . 



There are seven specimens of this sponge, all encrusting, 

 the largest being 5 cm. long and "5 cm. thick. The chief 

 point of interest lies in a comparison with the typical Euro- 

 pean form. In the latter the subtornote oxeas (fig. 9) are 

 considerably longer and thicker, viz. 320 X 20 /u, ; the amphi- 

 disks (figs. 10, 11) are much shorter, viz. 18"5 /i, with disks 

 21'4 in diameter and shafts 4*5 thick ; lastly, the gemmules 

 are smaller, on an average about "36 x -31 mm. These 

 differences led me at first to regard the Cape specimens as 

 representatives of a new species, but I ultimately came to 

 regard them as belonging to a new strongly marked variety 

 of Ephydatia JiuviatiUs. 



BIBLIOGRAPHICAL NOTICES. 



Memoirs of the Department of A(jriculture in India {Entomological 

 Series). 4to. Agricultural Research Institute, Pusa. Printed 

 by Thacker, Spiuk, & Co., Calcutta. 



A USEFUL periodical, recently commenced under the editorship of 

 the energetic Imperial Entomologist, Prof. H. Maxwell-Lefroy, 

 F.E.S., E.Z.S. The following parts have already apppeared : — 

 Vol. I. No. I. The Bombay Locust. 



II. The more important Insects injurious to Indian 

 Agriculture. 



Both by Prof. Maxwell-Lefroy. 



III. The Indian Surface Caterpillars of the Genus 



Agrotis. By Prof. Maxwell-Lefroy and his 

 Assistant, C. C. Ghosh, B.A. 



IV. Individual and Seasonal Variations in Jlelopeltis 



theivora, Waterhouse, with Description of a new 

 Species of Hdopeltis. By Harold H. ]\[ann, 

 D.Sc, Scientific Officer, Indian Tea Association. 

 The following is announced as in the press : — 



V. The Coccidae attacking the Tea-plant in India and 

 Ciylon. By E. E. Green, E.E.S., and Harold 

 H. Maun. i).Sc. 



