324 M. K. A. Zittel oti Fossil LitJiistidce. 



in this way, it puts me in mind of the late Sir Charles Napier 

 in Sind, when I heard and saw him, in his little subaltern's 

 tent, tear off his coat and throw it down in anger, observing 

 to an officer who had come to report his arrival, " There, Sir, 

 did you ever work in your life after this fashion ? " meaning in 

 his " shirt-sleeves." 



How far the stelliform groups of vessels may always indicate 

 a Stromatojwra I am not able to state ; but they are equally pre- 

 sent on the surface of both Ceriopora venosa, Goldf. (Taf. xxxi. 

 fig. 2, a, b), and Coenostroma, Winchell, 1866 (Proc. Amer. 

 Assoc), as evidenced by the illustration of the former, and 

 specimens of the latter in Prof. Nicholson's American collec- 

 tion, where he does not consider Ctewos^roma generically diffe- 

 rent from Stromatopora (Nich. and Mm'ie, op. cit. p. 210). 



XXXVII. — Studies on Fossil Sponges. — II. LitJiistidce. 

 By Kakl Alfred Zittel. 



[Continued from p. 247.] 



B. Special part '^. 



A. Rhizomorina. 



Cnemidiastrum, Zittel. 



Cnemicliwn p. p., Achilleum p. p., Goldf. 

 Cnemidium and Cnemisj)ongia, Quenst. 

 CiqndofiiKmgia p. p., U'Orb. 



Cnemiopelta, Cncmipseckia, Pacliypsechia, ? Ceriopelta, and Trachycinclis, 

 Pom. (non Cncmidmm, D'Orb. & Pom.). 



Sponge top- or skittle-shaped, cylindrical or cup-shaped, 

 with a depressed central cavity, monozoic, rarely polyzoic. 

 Thick wall traversed by numerous vertical radial fissures 

 (furrows), which frequently fork once or several times exte- 



* This portion of Dr. Zittel's memoir has been somewhat abridged. His 

 statement of the sonrces from which he derived his specimens has been 

 omitted ; the species marlied with an * are those of which he has exa- 

 mined the original types. He gives the following list of abbreviations 

 employed : — 

 Court. Ep. f oss. = Courtiller, A., "Sponges fossiles des sables du terrain 



cr^tac^ superieur des environs de Saumur," Ann. Soc. Linn, de 



Maine et Loire, 1861, vol. iv. 

 Etal. Leth, Br.=Etallon et Thurmann, " Lethsea Bruntrutana," Neue 



Denkschr, schw. naturf. Gesellsch. 1863, Bd. xix. & xx. 

 From. Intr.=Fi'omentel, E. de, "Introduction a I'^tude des Sponges 



fossiles," Mem. Soc. Linn. Norm. vol. xi. 1859. 

 Gein. Elbth. = Geinitz, "Das Elbthalgebirg in Sachseu," Palaontogr. 



Bd. XX. 

 Goldf. =Goldfuss und Munster, Petrefacta Germaniaj, Bd. i. 1826-1833. 



