422 Professor H. L. Hawkins— 
Conulus there is a marked tendency for the downward (i.e. orad) 
sloping lines to consist of three tubercles in series (chiefly on the 
adapical surface), while in Pyrina they rarely comprise more than 
two. Thus the tuberculation of Conulus often appears somewhat 
irregular, while that of Pyrina consists of two regular transverse 
rows of tubercles on each plate. The ambulacral plates are grouped 
into triads almost throughout the areas in both genera, but the pore- 
pairs take on a triserial arrangement near the peristome in Conulus, 
and are practically uniserial in Pyrina. Because the form about to 
be described resembles Pyrina in tuberculation (though showing 
certain differences of detail) and Conulus in pore-disposition (though 
in an exaggerated manner), I have named it 
CONULOPYRINA. 
Holectypoida, Echinonéide (sensu Hawkins, 1920, non Lambert, 
1918) ? Conuline. 
Test. oblong-oval ; adapical surface tumid, apex central; adoral 
surface rounded, tumid posteriorly, peristome slightly invaginate ; 
ambitus rounded. Peristome slightly elongate, about 0°18 of test- 
diameter. Periproct marginal, rounded adorally, sharply acuminate 
-adapically. Apical system as in family. Ambulacra lanceolate, 
widening rapidly but evenly from apex to ambitus, slightly 
convergent adorally ; plates apparently with Pyrinid triad grouping 
almost throughout. Pore-fields very narrow adapically, very faintly 
impressed ; pore-pairs uniserial on adapical surface, definitely 
triserial from ambitus to peristome. Interambulacra about 
2°5 times width of ambulacra on ambitus—-each plate corresponds 
to about five ambulacral plates adapically, and about seven adorally. 
Primary tubercles arranged as in Pyrina ; little additional ornament 
adorally, but greater parts of adapical surface occupied by crowded 
secondary tubercles and granules of various sizes, but with no 
scrobicular arrangement. 
Genotype. — C. anomala sp.n., ?Cenomanian, Shenley Hill. 
(edhe WADI.) 
Description of the holotype (Sedgwick Museum, Walker Coll., 
1905.” “ No. 3,”” Hawkins, Grou. Mac., Vol. LVIII, 1921, p. 58). 
Measurements —Antero-posterior diameter, 28°5 mm. = | ; trans- 
verse) diameter, 27:0 mm. — 095 hereht, 14:5 mms — Ojo 
peristome (approximate diameter), 5°1mm.—0:18; _ periproct 
(long diameter), 8°O mm. ; periproct (transverse maximum diameter), 
55 mm.; apical system (ant.-post. diameter), c. 2°3 mm. ; ambulacra 
(width on ambitus), 447mm.=1. Interambulacra (width on 
ambitus), 12°0 mm. = 2°55. 
Number of ambulacral plates (area IIa), 103 (45 on adoral surface, 
58 on adapical surface). 
Number of interambulacral ‘plates contiguous to above, 22 (10 
adoral, 12 adapical). 
Ambital outline ovoid, obtusely angular (Pl. VII, Figs. 1 and 2) 
