Jrom the Gulf of California. 95 
proportionate length of the ambulacral grooves varies consider- 
ably, both in different specimens and on opposite sides of the 
, is 
ye different, it being in Gray’s figure at a considerable distance 
m the posterior end, and therefore more ventral and nearer the 
subanal fasciole. The peripetalous fasciole is also very different 
from that of any of my specimens. 
Agassizia subrotunda Gray. 
Catalogue Ech. of British Mus., p. 63, tab. 3, fig. 2; Verrill, Proc. Bost. Soc., 
vol. xii, p. 381. 
A. ovulum Lutken, Vidensk. Medd., p- 134, tab. 2, fig. 8; Verrill, Trans. Conn. 
Acad., vol. i, p. 320. 
Of this species there were about a dozen specimens, mostly 
more or less broken, which show but little variation and agree 
well with Gray’s figure. aight 
Mr. A. Agassiz regards this and A. ovulum Lutk. as identical 
with A. serobiculata Val., which may well be the case if the 
ao in the Voyage de la Vénus be incorrect, as he states. 
The figures are certainly very unlike our specimens. 
Clypeaster speciosus Verrill, sp. nov. 
epressed, gradually rising toward the apex; the lower side 
sometimes slightly concave from near the edge of the mouth, 
m other specimens flat except close to the mouth, which is much 
sunken. Outline oblong-pentagonal, with rounded angles and 
The anterior end slightly elongated. 
Pores slightly raised, narrow, elongated, widening but little out- 
wardly and somewhat acu oO 
rosaceus. Anal ope D : 
ated about its own diameter from the edge of the shell. 
Length of largest specimens 4°60 inches ; breadth 3°90; hei ht 
115. Length of anterior petal, from the apex 1-90, its breadth 
breadth of enclosed space 50; length of anterior petals 1-70, 
breadth of enclosed of 
