98 



everted, and all turned one way. Ellis figures some oval- 

 shaped vesicles, arising from the base of the cells, speckled, 

 with a small tube at the back ; this is of rare occurrence, for 

 I have never seen it. 



I am inclined to think that two species have been included 

 under this name. In Turton's edition of Linnaeus, vol. 4, 

 page 686, it is said, M Denticles alternate with a single hair 

 on the top of each," and in Stewart " denticles alternate" 

 whereas this species has only a single row of cells which 

 are all turned one way, and Lamouroux by placing it in 

 Eucratea, makes it to have only one row, " Polypier 

 phytoide, articule ; ckaque articulation composee d'une seule 

 cellule simple et arqute ; overture oblique;" and Fleming, 

 " Branches consisting of a single row of bent cells." I have 

 made these references because I have met with two speci- 

 mens, of what appeared at the time to be deformed 

 specimens of this species, in which, although the cells might 

 be said to be uniserial, yet their bent necks and apertures, 

 were alternately turned in opposite directions, and hence 

 might be said to be alternate, and the bristles, instead of 

 being above, were beneath the apertures, which would 

 nearly correspond to the description of Linnaeus and Stewart. 



BULL'S-HORN CORALLINE, C. Chelata. Cells in 

 the form of a shoe; apertures oblique, with a slightly 

 tubular rim, and a short tubular spine beneath. PI. 18, 

 fig. 1. 



Bull's-horn Coralline, Ellis' Coral., p. 42, no. 9, pi. 22, 

 fig. b B. Cellaria chelata, Ellis and Solander's Zooph., 

 p. 25. Sertularia loricala, Turton's Lin., vol. 4, p. 686, 

 Stewart's Elem., vol. 2, p. 449. Eucratea loricata, Flem- 

 ing's Brit. An., p. 541. Eucratea chelata, Lamouroux's 

 Cor. Flex., p. 149, no. 201. Loricula loricata, Templeton 

 in Mag. Nat. Hist., vol. 9, p. 409. Crisia chelata, John- 

 ston's Brit, Zooph., p. 261, fig. 43. p. 260. 



Hab. On the roots of fuci, not common. On corallines, 

 rare. Polperro ; Lantivet and Whitsand bays. Goran 

 Haven. Mr. Peach. 



This is a very minute species, and is in its appearance, 

 more singular, perhaps, than any other of the family. It is 

 confervoid, calcareous, erect, and rises from minute tubular 

 fibres which trail over the fucus on which it grows and root 

 it to the spot. The first cellule which arises from the root 

 is long, tubular, slender, with an everted neck, very much 

 resembling a cell of the last described species. It is much 

 and irregularly branched and composed of a single series of 

 cells arranged longitudinally one above another. The cells 

 are shoe shaped, or they more closely, perhaps, resemble 



