442 A. W. WATEES ON FOSSIL CJHLOSTOMATOTTS 



61. Lunulttes initia, sp. nov. Plate XII. fig. 8. 



Zoarium subcorneal, small, 1 millim. in diameter. Zooecia oval, 

 surface granulated, concave, separated by a raised border. Aperture 

 rounded above, with a real or apparent sinus below. A few conical 

 cells, with three large pores between the zooecia and at the edge of 

 the zoarium. Base of zoarium showing each zooecium raised and 

 radiating from the centre. 



Loc. Waurn Ponds. 



62. Ltjnttlites petaloides, d'Orb. Plate XII. fig. 11, a, b, c. 



Lunulites petaloides, d'Orb. Pal. Franc, p. 353, pi. 705. figs. 6, 9. 



Lunulites androsaces (of Allioni), Manzoni, Bri. Plioc. Ital. cont. 

 la, p. 12, pi. ii. fig. 18, and Bri. Foss. del. Mioc. d'Aust. ed 

 Ungh. p. 25 (73), pi. xvii. fig. 57. 



Lunulites distans, Gabb & Horn, Monogr. Poss. Pol. of Second. 

 andTert. Porm. of IS". Amer., Ac. Nat. Sc. Philad. vol. v. pt. ii. p. 119, 

 pi. xix. fig. 4. 



Oligotresium vicJcsburgensis, Gabb & Horn, loc. cit. p. 139, pi. xix. 

 fig. 22. 



Lunulites cupola, T. Woods, " On some Recent and Fossil Species 

 of Selenariadse," Trans. Phil. Soc. Adelaide, 1880, p. 8, pi. i. fig. 5a, c. 



Zoarium conical. Zooecia oval to hexagonal, area depressed, 

 slightly raised round the aperture, surface granular. Aperture 

 (oral or opesial) straight below, rounded above. Yibracula usually 

 forming a row between the radial zooecia, but sometimes fewer, and 

 irregularly spread over the zoarium ; opening of vibracula elongate, 

 with a process projecting from each side, which are sometimes equal, 

 but in other cases the projection on the left is much larger and toothed. 

 Central zooecia smaller, frequently closed with a granular calcareous 

 mass. This commences inside the distal end of the aperture, and is 

 subtriangular, hanging down inside the aperture like the human 

 tonsil in the throat. It becomes gradually wider until the whole 

 aperture is closed. 



In one specimen the vibracula are placed quite regularly in radial 

 rows ; in two others, in which both zooecia and vibracula are rather 

 larger, there are fewer vibracula, and these are not regularly 

 placed. 



This is a species which lived through the Cretaceous, Miocene, 

 and Pliocene ; and it and its allies were widely distributed in 

 Cretaceous and Miocene times. The list of synonyms ought to be 

 very large ; but as the description, in some cases, leaves it doubtful, 

 I only mention, as belonging to the group, if not to this species : — 

 Lunulites Goldfussi, Hag. ; L. Hagenowi, Bosq. ; L. quadrata, Pss. ; 

 L. hamispJiosricus, Horn. ; L. microporus, Pom. ; Disco escharites ma- 

 mittatus,~R6m.. ; L. latdorfensis, Sfcol. ; L. conicus, Busk; L.apertus, 

 T.Woods ; L. exiguus, T.Woods ; L. Bourgeoisii, d'Orb.; L. regidaris, 

 d'Orb., L. cretaceus, Defr. If a new species is to be made each time 

 that the shape of the zoarium varies, we can then make an enormous 

 number of species of Lunulites : and for those who are fond of 



