1884.] NATURAL SCIENCES OP PHILADELPHIA. 20V 



No. 10. Raphyrus Griffithsii, Bk. Branched tubular variety, 

 therefore might he designated " ramotubulata," Crtr. (The 

 first instance of this form that I have seen.) 



No. 11. The same, but the usual massive, solid form. N. B. — 

 It is Gliona celata, which, after having destroyed the oyster-shell 

 in which it generally burrows, grows into the free form called 

 by Dr. Bowerbank " Raphyrus Griffithsii " (Mon., vol. iii, pi. 64). 



No. 18. Suberites ? sp. Fragment branched and interuniting 



most irregularly. Surface covered with short warty and digiti- 

 form processes. Consistence light corky. Color ochre-yellow. 

 Structure cellulo-cavernous. Spicule of one form only, viz., pin- 

 like ; shaft smooth, slightly fusiform and curved ; head oval, often 

 followed towards the shaft, by an annular inflation ; size, 30 by 

 1_1800 in. 



No. 33. Suberites ? sp. Fragment useless for general form ; 



further than that it is verj^ irregular and interuniting, suberite- 

 like. Consistence firm. Color white. Structure cancello-cavern- 

 ous. Spicule of one form only, viz., pin-like ; shaft smooth, 

 slightly fusiform and curved ; head globo-conical ; about 65 by 

 1—1800 in. 



No. 1. Suberites? sp. Massive, erect, sessile, terminating 



in small, conical processes. Consistence now firm. Color gray 

 outside, yellowish inside. Structure cancello-cavernous. Spicule 

 of one form only, viz., pin-like ; shaft smooth, slightly fusiform 

 and curved ; head nearly oval ; point obtusely rounded ; size 25 

 by 1 — 1800 in. in its greatest dimensions. (If the obtuseness of 

 the point is not accidental, this is a good character.) 



11. Compact A. 



No. 4. Suberites ? sp. Taking the form of the Serpula- 



tubes over which it has grown, interuniting and enclosing shells. 

 Consistence hard now and compact. Surface villous. Color 

 yellowish gray. Spicule of one form only, viz., pin-like ; shaft 

 smooth, slightly fusiform and curved; head oval, often prolonged 

 posteriorly ; size 50 by 1 — 1800 in. 



No. 8. Suberites ? sp. Taking its form from the sedgy 



leaves over which it has grown. Consistence cheesy, now hard. 

 Color greenish outside (adventitious ?), yellowish within. Like 

 Hymeniacedon carnosa, Bk., in consistence and structure, if not 

 in the forjn of the head of the spicule. 



