22 F. A. SMITT, 



Cribrilina radiata y ) (Pl. V, figs. 107, 108). 



In addition to the excellent description, given by Moll, I will only point to the 

 pair of movable bristles (fig. 107), placed proximally at the side of the aperture. Their 

 nearest correspondence, I think, we find, on Membraniporella sceletos 2 ), in that "ascend- 

 ing spine at each lower angle of the aperture", as described by Busk. As to their 

 use, they seem to represent sensorial vibracula. Very often they are laid down along 

 the side of the zooeeion 3 ). In the harder calcifications (fig. 108) they are wanting. 

 The latter state, also, shows an other aberrance, when the triangulär or seraicircular 

 space of the front side, just proximally of the aperture, raises itself into a blunt den- 

 ticle (mucro). Similar denticles are raising themselves on various points of the front 

 side of the zooeeion, as thicknesses of the wall, especially in the mesial line and on 

 the ribs, in their end, at the margin of the front side. The rib on the ooecion, also, 

 in the harder calcification raises itself in the same manner, just above the middle of 

 the aperture. As to their size, the zocecia vary very much. In the same colony I 

 have measured the striated and prickled front-side (the primary ai^ea) of two zooecia, 

 from its proximal end to the proximal margin of the aperture, differing in length from 

 0,io mm. to 0,38 mm. The breadth of the aperture of the more out-grown zooecia va- 

 ries from 0,07 mm. to 0,o$ mm. 



Pourtales bas taken two specimens of this species, the one from 176 fathoms, 

 in a slight degree of calcification, growing on a dead Terebratula, the other, of a harder 

 calcification, growing on a piece of Oculina from 60 fathoms. 



Cribrilina innominata 4 ) (Pl. V, figs. 109, 110). 



The only difference from the preceding form, which may be used as a specifical 

 character, is the presence, on Cribrilina innominata, of a lunate pore in the triangulär 

 or semicircular space, proximally of the zocecial aperture. This is the reason, why I 

 do not identify this form with the Eschara radiata of Moll, notwithstanding the weighty 

 authority of Busk on the other side, because that pore, probably, would not have 

 escaped the observation of Moll. Otherwise, in their whole strueture as well as in their 

 changes with the degree of calcification, these two Cribrilince are totally agreeing. 



l ) Eschara radiata, Moll, Esch., p. 63, tab. IV, fig. 17. 



As to the generic name Cribrilina, I find it necessary to restitute this name, created by Gray, 13 years 



before the Escharipora was proposed by D'Orbigny. In the following we will see, that the last name, 



also, is to be used in this faraily. 

 -) Lepralia sceletos, Busk, Quart. Journ. Micr. Se, vol. VI, p. 262, Zooph., tab. XX, fig. 3. 



3 ) These bristles seem to declare that pore special, as described by D'Orbigny, in the following species, which 

 are to be placed very near to the present species and its congeners: 



Semiescharipora fragilis, Pal. Franc, Terr. Crét., vol. V, p. 480, pl. 717, figs. 8 — 11; 

 " brevis, » » » » « « p. 485, pl. 718, figs. 21 — 24; 



« ovalis, » » » » >i a p. 488, pl. 719, figs. 13 — 16. 



4 ) Lepralia innominata, Couch, Gom. Fn., part. III, p. 114, tab. XXII, fig. 4; Johnst., Brit. Zooph,, ed. 2, 

 p. 319, tab. LV, fig. 12; Gray, Cat. Brit. Mus., part. I, Rad., p. 121; Busk, Cat. Brit. Mus., Polyz., 

 p. 79, tab. LXXXVI, figg. 2, 3; 1d„ Crag Polyzoa, p. 40, tab IV, fig. 2. 



? Reptescharella pygmea, D'Orb., Pal. Franc. Terr. Crét., vol. V, p. 468, tab. 716, figg. 7, 8. 

 Lepralia radiata, Busk, Quart. Journ. Micr. Se, vol. VI, pp, 128 et 263, Zoophytol., tab. XX, figg. 4 et 5 



