NORTHUMBERLAND AND DURHAM. 143 



(Barrett), and Amphidotus gibbosus (Agassiz). He accordingly- 

 proposed to substitute the specific name of " pennatifidum " for 

 that of " gibbosus." At plate V., fig. 1, this specimen is figured 

 of the natural size, figs. 2-4 representing valves of the two kinds 

 of pedicellariaa present on this species, fig. 2 being the immature 

 stage of fig. 3. The readiest means of identifying this species 

 is by examination of the ambulacral pores, to facilitate which 

 drawings of this species (fig. 5), of E. cordatum (fig. 6), and of 

 E. overturn (fig. 7) are given. It will be observed that E. pen- 

 natifidum has four pairs in the fore and fourteen in the hinder ; 

 E. cordatum seven and twelve ; and E. ovatum four and nine. 

 These are all figured from specimens in my collection, and re- 

 present the left anterior lateral arrangement of pores drawn of 

 the natural sizes and contour. Forbes in his British Starfishes 

 gives E. cordatum six and eleven, and E. ovatum five and ten : 

 the numbers are not always exactly the same, being dependent 

 upon age. 



Order V. HOLOTHUROLDEA. 



Family. HOLOTHURIAD^l. 



Genus. CUCUMARIA, Blainvilh. 



Cucumaria elongata (Dilben and Koren). PI. I., figs. 1-14. 



Cucumaria elongata, Duben and Koren. Skan. Echin., 

 p. 301. PI. XL, fig. 56, and PL IV., fig. 14. 



Cucumaria elongata, Alder. Trans. Tyneside Nat. Field 

 Club, Vol. IV., p. 43. PL II., fig. 3. 



From deep water boats, rare, J. A. Northumberland and 

 Durham coasts, rather rare, G-. H. 



Mr. Alder was the first to record the capture of this species on 

 our coast, Mr. Joseph Wright, with his well-known assiduity, 

 having procured two specimens from the five-men boats in 1857. 

 In 1863 Mr. G. S. Brady and I obtained a few specimens when 

 dredging off Holy Island, and again off Seaham in the following 

 year. It is an inhabitant of deep water, and has never been 

 taken by us in any of our inshore dredgings. The spicules from 



