E. MAKSHALLT. MISCELLANEOUS NOTES 201 



suggested, while tlie principal parenchymal strands pursue irre- 

 gular courses instead of being arranged in regularly transverse 

 and longitudinal beams. Of interest is a case in which a veri- 

 table sieve-plate, inclosing eleven meshes and exactly comparable 

 in appearance to that at the upper end of the sponge, was formed 

 right in the regenerated tract of the lateral wall. Noteworthy 

 seems another case in which a portion of the superior sieve- 

 plate and of the cuff was incompletely severed and turned up as a 

 free flap, the gap left in the sieve-plate being filled in by an 

 extension of tissues from the lateral wall. 



A Stenopid Crustacea, which I identify as Spongicola venusta 

 of DeHaan"^', inhabits the gastral cavity of E. marshalli with 

 tolerable constancy. It is usually found in pairs, a male and a 

 female. Occasionally it has been found single; which of the 

 sexes then prevailed, I have not noticed. Except in very small 

 and young sponges, it is quite rare that the Crustacean inmate 

 is entirely missing. 



In the living state, Spongicola venusta is a very pretty 

 animal, being transparent and of a light pink color. The female 

 may at once be distinguished from the male by the considerably 

 smaller chela? and the pale-green ovary visible through the body- 

 wall. Of the same color as the ovary are the eggs attached to 

 the abdominal appendages of adult females. 



A frequent companion of the Crustacea in the gastral cavity 

 is an Ophiuron, which I have not identified but ^vhich probably 

 belongs to the genus Ophiothrix. 



* Fauna Japonica. Cruätacea. P. 104 ; pi. XLVI, fig. 9. — Miers, Linn. Soc. Jonrn. Zool. 

 Vol. Xin, p. 507; pi. 21, figs. 1, 2.— Bate, Chall. Rep. Vol. XXIV, p. 213. 



