1904.] SPONGES OP THE GENUS LEUCOSOLEXIA. 385 



The diagnostic featufes of this sponge are: — (]) The constant 

 shortness of the unpaired ray of the triradiate systems relativ^e 

 to the lateral rays, and the wideness of the anterior angle, 

 frequently nearly 180°; (2) the two kinds of monaxous, both 

 barbed — straight refringent ones always slender and small, rela- 

 tively scarce ; and curved ones, varying from very small to very 

 large, always abundant. 



(d) List of Sjjecimens exami)ted. 

 (a) From Canon Norman s Collection. 



1. Specimen from Bantry Bay, Ireland, with Norman's label 



" Lencosolenia hotryoides" endorsed by Haeckel ^^Ascandra 

 variabilis." (See text-fig. 95, figg. IQ a-lQ g, p. 379.) 



2. Specimens from Shetland, with label in Bowerbank's 



handwriting " Grantia botryoides Johnston, more largely 

 developed than usual." Also a label by Norman '■'■ Leuco- 

 solenia botryoides, very large, Shetland," across which is 

 written in Haeckel's handwriting ^'■Ascaiidra variabilis H." 

 * These specimens are of the same batch as No. 8 below. 



3. Specimens received by Norman from Haeckel, collected at 

 Bergen, Norway, with pidnted label '^ Ascandra varia- 

 bilis H." 



4. Specimen received by Bowerbank as a type of Leucosolenia 



contorta, from Guernsey ; sent to Haeckel for examination, 

 and returned with label in Haeckel's handwriting as 

 follows : — 



^' Ascandra contorta H. 

 " {Leucosolenia contorta Bwbk.) 

 " Guernsey. Bowerbank." 

 The specimen is a quite typical variabilis, with a slight 

 admixture of Sycon spicules. 



5. Specimens growing on seaweed with Grantia compressa, 

 from Polperro, Cornwall, and identified by Haeckel as 

 Ascandra variahilis : my prepai'ations show a mixture of 

 spicules of variabilis and complicata. 



(&) From the British Museum. 



6. Bowerbank Coll., No. 1017. The type specimen of Bower- 

 bank's " Leuconia somesii," figured in Brit. Spong. iii. 

 pi. xci. fig. 6. With label in Bowerbank's handwriting — ■ 

 " Leuconia somesii Bwk., sent to me by Mr. H. Lee, 

 15.9.73, said to have been found alive in the aquarium " 

 {i. e. at Brighton). (See text-fig. 95, figg. 19a-19/i, 

 p. 379.) 



7. Bowerbank Coll., 1018, Another specimen with Bower- 



bank's label " Leuconia somesii, Brighton Aquarium, sent 

 by Mr. Lee, 5.11.73." Figured in Brit. Spong. iii. pi. xci. 

 fig. 8. 



8. Bowerbank Coll., 1019. Another specimen with label 

 similar to the last. Figured in Brit. Spong. iii. pi. xci. 

 fig. 7. (See text-fig. 95, figg. 18a-18e, p. 379.) 



Proc. Zool. Soc— 1904, Vol. II. No. XXV. 25 



