496 Dr. Henry Woodward — On a new Loricula. 



corresponding in longitudinal order with the valves above each row 

 in the capitulum, the left-hand long row (see Fig. 2, cl) being 

 immediately below the carinal latus (/) ; the middle row {ml) below 

 the median or upper latus [V) ; the scutal row {si) below the scutum 

 {set). Outside these are two very narrow rows of scales, that on the 

 left-hand margin of the peduncle, named the carinal series {sc), being 

 immediately below the carina (c), that on the right-hand (««) being 

 the sub-rostral (?) or sub-scutal row. On the same margin may be 

 seen a portion of yet another series of narrow scales showing their 

 intier surfaces (see Fig. 1, right-hand side of peduncle), which are 

 no doubt the second row of sub-rostral or sub-scutal scales, forming 

 the attached margin of the peduncle, but slightly displaced like the 

 inner border of the left scutum {set') seen immediately above them. 



Taking the rows in order, from left to right, in the peduncle, the 

 first carinal row is only about Hmm. in breadth at the base of the 

 carina, and the scales are almost rectangular oblong in shape and are 

 not imbricated as in the three central series ; they are 1 7 in number 

 and diminish gradually downwards to about 25 mm. from the 

 capitulum, when the series disappears, only the three central 

 transversely elongated lines of scales being persistent to the extremity 

 of the peduncle. Although visible in other specimens, as well as in 

 Darwin's type-specimen, the small initial extremity of the peduncle 

 in the large new specimen is imperfect (see Fig. 1). This tiny point 

 may represent the loss of fi.ve or even six rows of very minute scales, 

 so that in counting the number in these three central series five 

 lost scales may very safely be added to each. The carino-lateral 

 row is 5 mm. broad just beneath the latus ; there are 23 scales 

 in the longitudinal series (+ 5 missing = 28), which is one more 

 than in the median row. These scales are not imbricated with 

 the carinal row, being only united by a straight, simple line of 

 suture, but on the inner border the end of each scale is pointed 

 where it interlocks with two rows of the median series, so that 

 the scales in each series alternate with the row adjoining it. The 

 scales are slightly arched along their upper margins, and after the 

 ninth scale, counting from the capitulum, they diminish rapidly in 

 breadth to the apex. The median lateral scales are the most 

 symmetrical series ; they are slightly wider (near the middle of the 

 peduncle) than those on either side, and each scale is pointed at both 

 ends, their upper margins being flatly arched near the capitulum, and 

 more strongly arched in the lower part of the peduncle. They have 

 one less scale (22 rows) than in the preceding series, and they 

 diminish less rapidly in breadth downwards than the lateral series of 

 scales. 



The scutal series of scales are 4 to 5 mm. broad at their upper and 



S. P. Woodward, described and figured in the Geologist for 1863, vol. vi> 

 pp. 327-30, pi. xviii, in -which the test of the Echinoid is rendered flexible by ten 

 segments, or a double series of imbricating calcareous plates. See also "\Yyville 

 Thomson's account of the living genus Calvcria [Asthenosoma) hi/sir ix, in " Depths 

 of the Sea," 1873, pp. 155-9, and Phil. Trans. Roy. Soc, 1874, vol. clxiv, 

 pp. 730-7; and Professor J. W. Gregory on Echinothuridse, etc., Quart. Journ. 

 Geol. Soc, 1897, vol. liii, pp. 112-22. 



