Bibliographical Notices, 525 



surface ; witli tliick (10 /a) cliitinous inner shell and a single 

 layer of ampliidisks embedded in a vesicular layer. 



Spicules : slender oxeas (fifi;. 3) 288x8 /m, curved, attenu- 

 ating gradually, smooth or finely and sparsely spined; tornote 

 oxeas (figs. 4, 5) 240 X 12 yu,, smootli or finely spined. 



Gemmule sjiicules : amphidisks (figs. 6-8) 35'6 fi long, 

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

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

 centre of disk. 



Numerous developmental forms scattered in the tissues of 

 the sponge. 



Ilab. Valkenberg Vlei, near Cape Town {J. Stuart 

 Thomson). 



There are seven specimens of this sponge, all encrusting, 

 the largest being 5 cm. long and '5 cm. thick. Tiie 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 /* ; the amphi- 

 disks (figs. 10, 11) are much shorter, viz. 18'5 fi, 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 jiu via tilts. 



BIBLIOGKAPHICAL NOTICES. 



Memoirs of the Department of A<iricidtare in India {Entomolocjiad 

 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. JI. Maxwell-Lefroy, 

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

 Vol. I. No. I. I'he Bombay Locust. 



II. The more important Insects injurious to Indian 

 Agriculture. 



Both by Prof. Maxwell-Lefroy. 



III. The Indian Surface Caterpillars of the Genua 



Aijrotis. By Prof. ]Maxwell-Lefroy and his 

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



IV. Individual and Seasonal Variations in Jlelopcltis 



theirora, Waterhouse, with Description of a new 

 Species of lltloj^cUis. By Harold K. Mann, 

 D.Sc, ScientiHc OfHcer, Indian Tea Association. 

 Tiio following is announced as in the press : — 



V. The Coccida^ attacking the Tea-plant in India ami 

 C.-ylon. Bv K. E. (iieon, F.K.S., and Harold 

 11. AJanii, D.Sc. 



