48 THE CRAG POLYZOA. 



entertained with respect to the identity of his species with that of the Crag ; the only 

 apparent discrepancy in his description is the statement, that in L. biaperta the cells are 

 disposed in radiating lines, rather than in regular qnincuncial order, as they appear to be 

 in all the Crag specimens. 



. 2. INARMA. 

 (a) With oral spines. 

 16. L. VARIOLOSA, Johmt. PI. IV, figs. 4 and 8, and PL VIII, fig. 8. 



Cellulis ovatis, iramersis, in seriebus linearibus plerumque dispositis, marginem versus 

 puncturatis sen areolatis, snperficie granulosa vel puncturata. Orificio orbiculari sen sub- 

 quadrangulari, 2 4 spinis marginalibus approximates supra armato ; peristornate antice 

 elevato, infra intnsque denticulum bifidum ostendente. Ovicellulis alte immersis, ad 

 rnarginem areolatis. 



Cells oval, immersed, usually disposed in linear series, punctured or areolated round 

 the margin, surface granular or punctured ; orifice orbicular or subquadrangular, with two 

 (or four) close-set marginal spines behind ; peristome projecting in front ; a bifid denticle 

 within the orifice. Ovicells deeply immersed, areolated round the margin. 



LEP. VARIOLOSA, JoJmst., Brit. Zooph., 2d ed., p. 278, pi. xxxiv, fig. 4 ; Busk, Brit. M. 

 Cat., part ii, p. 75, pi. l.txiv, figs. 3, 4, 5, pi. Ixxv. 



Habitat. C. Crag, on shell, S. W. 



This is one of the more variable species of Lepralia, exhibiting such great diversity of 

 aspect under different circumstances, as to cause considerable difficulty in its diagnosis. 

 Three common varieties are represented in the Plates. At PI. IV, fig. 4, is a variety 

 without apparent spines, and at fig. 8, one in which the peristonie is inordinately pro- 

 duced in front, whilst the two oral spines are perceptible ; these are more clearly shown in 

 the specimen figured in PI. VIII, fig. 8, in which all the characters of the species are best 

 exhibited. 



17. L. PEACHII, Johnst. PI. V, figs. 6, 7, 8 ; PI. VI, fig. 4. 



Cellulis quincuncialibus seu seriatis, ovatis, ventricosis, supra suberectis, umbonatis, 

 superficie glabra vel granulosa, serie unica punctorum basim circa ornatis. Orificio supra 

 arcuato, infra coarctato, infra deute meclio lato labium intus, armato ; 4- 6 spinis mar- 



