82 FOSSIL CIRRIPEDIA. 



Natural History.' ' I believe the specimen to be extremely incomplete ; certainly only 

 one side of the capitulum and peduncle is preserved ; but on this subject I shall offer a few 

 remarks after describing the specimen in its present state. The specimen was embedded 

 outside the cast of an Ammonite : ]\Ir. J. Morris informs me, that he has no doubt that 

 the pit at Cuxton is worked in the Lower Chalk. 



The Capitulum (Plate V, fig. 1, of nat. size,) consists of three left-hand valves, which are 

 small compared to the size and width of the peduncle, making me believe that the greater 

 part of the animal's body was lodged in the peduncle, as in the recent genera, Lithotrya 

 and Ibla. Of the three valves, I believe from the general shape and direction of the lines 

 of growth, that one (on the right-hand side of the figure) is the scutum ; of the other two, 

 I will at present call that nearest to the scutum the first latus, and the other the second 

 latus. The three valves are of nearly equal size : they are very slightly convex, quite 

 smooth, moderately thick, with the lines of growth fine and obscure. 



Scutum (fig, 3) triangular, apex somewhat produced, and bowed over towards the 

 latera: occludent margin slightly arched, forming an angle much less than a rectangle 

 with the basal margin, which latter is at right angles with the margin, called in Pollicipes 

 tergo-lateral. The lines of growth, in the lower part of the valve, are parallel to the tergo- 

 lateral and basal margins ; and as far as I could distinguish in the imperfect condition of 

 of the valve, the valve is added to a little during growth at the apex, so that the umbo 

 is not situated at the uppermost point. In this important respect Loricula apparently 

 resembles the Scalpellum magnum^ tuberculatum and creta. 



The first (so-called) latus is nearly flat, triangular, with its apex on a level with that 

 of the scutum ; the scutal margin (lying close and rather over the edge of the scutum) 

 is just perceptibly arched, and a very little longer than the other lateral margin : the basal 

 margin is shorter than the two lateral margins ; growth downwards. 



The second (so called) latus (fig. 2) is triangular, of nearly the same shape with the last 

 valve, with the inner basal angle a little produced ; the outer margin is very slightly arched, 

 and is shorter than the inner margin ; the main growth is downwards, but the lines curl a 

 little up and round the inner margin. The apex of the valve in its present position stands 

 a little above the apices of the other two valves, and a wedge-formed open space separates 

 the upper part of the two latera. 



Peduncle : this has a most singular, elegant, loricated structure : it is wider than the 

 capitulum in the present condition of the latter, and about four times as long. It is 

 completely protected by large, smooth, calcareous scales, of which five rows are preserved ; 

 and I conceive there can be no doubt from the shape of the end rows, that there originally 

 existed a corresponding series on the opposite side, making altogether ten rows. The 

 base is sharply pointed, down to which the full complement of scales extends. In each row 



^ Since Mr. Sowerby made his description, Mr. Wetherell has cleared away more of the Chalk, thus 

 exposing a row of small scales at the carina! end of the peduncle, not seen by Mr. Sowerby. 



