658 
Proceedings of Royal Society of Edinburgh. [sess. 
times obtusely rounded; those bordering the subobsolete interval 
with the inner ends nioreVblique and slightly concave inwards ; the 
areolse evident, decreasing gradually outwards, from 8 to 10 in -01 
mm.; the intervals tapering gradually outwards, their outer ends 
convex, reaching close to the border. — Ralfs in Priich. Inf. , p. 837, 
pi. v. fig. 79 ; Cleve, Bih. h. Sv. Vet- Ah. Handl. Stochh ., 1873, 
Bd. i. No. 13, p. 10; Sch., Atl., pi. xxxviii. figs. 21-23; Astero- 
lampra Broohei, Grev., Trans. Micr. Soc. Bond., 1860, p. 119, pi. 
iv. fig. 18; Actinogramma Broohei, Ehrb., Abk. Ber. Ah., 1872, p. 
254. 
Habitat. — Sea of Kamtschatka, 1700 fathoms (Bailey!); 
Behring Sea, 1158 fathoms (H. L. Smith!); Atlantic soundings 
(Roper) ; Santa Monica deposit ; (Deby !) loc.? (Grove !). 
Yar. robusta, nov. A. robustus, Cstr., Atti Accad. Pontif. nuov. 
Lincei, 1875, p. 393, pi. vi. fig. 5. — Rotundato-obovate. Markings : 
rays sharply bigeniculate at their middle ; the compartments reach- 
ing from J- to ^ of radius inwards, the inner ends of those adjacent 
to subobsolete interval transversely truncate, of the others some- 
what concave inwards ; intervals broad, with sides parallel reaching 
the border. — A. ( Broohei , var.?) robustus, Peragallo, Diat. Baie 
Villefranche, p. 75, pi. ii. fig. 15. 
Habitat. — Mediterranean Sea (Castracane). 
Asterom. Beaumontii , Ehrb., Mon. Ber. Ah., 1844, p. 200, fig. 5. 
— Diam. *04 mm. Centro-lateral area with sides parallel, and 
inner ends conical. Markings : rays sharply bigeniculate at their 
middle, the compartments reaching about -J of radius from circum- 
ference, conical, with inner ends obtusely angular ; areolse distinct, 
from 6 to 8 (?) in -01 mm.; intervals between compartments 
attenuating gradually outwards, reaching the border. 
From this species I exclude Spatangidium heptactis, de Breb. 
(Bull. Soc. I/inn. Normand., 1857, p. 292, pi. iii. fig. 2) ; 
S. ralfsianum, Norman (not Grev.), Quart. Jour. Micr. Sci., 1859, 
p. 161, pi. vii. figs. 7, 8) ; and Asterolampra heptactis, Grev. (Trans. 
Micr. Soc. Bond., 1860, p. 122), which Janisch (Abh. Schl. Ges. 
voter. Cult, 1861, p. 160) has proposed to unite with it. Janisch 
also proposes to unite to Asterom. Beaumontii the forms figured by 
