CATALOGUE OF ECHINIDA. 9 
Echinodiscus, sp., Van Phel. , not Breyn ; Gray , Ann. Phil. 
1825-6. 
Laganum, Klein. Agassiz, Mon. Echin. ii. 105, 149 ; Agassiz S 
Desor, Ann. Sci. Nat. 1847, 132. 
Lagana, Gray, Ann. Phil. 1825, 5 ; Blainv. D. S. N. lx. 196. 
* Genital pores 4 ( hinder wanting'), on the sides of the central 
madreporiform plates between the apices of the ambulacra ; 
vent small, circular. 
1. Laganum rostratum. 
Body oblong, elongate, produced behind ; vertical star rather 
large. 
Laganum rostratum, Agassiz , Mon. Scutelle, 118, t. 25 ; Agas - 
siz &) Desor, 1. c. 132. 
Hab. New Zealand. 
a. Under surface imperfect. New Zealand. 
2. Laganum Lesueurii. 
Yent near margin, rather ten-sided, nearly as broad as long, 
depressed, thin ; edge thin ; ambulacra linear, lanceolate ; 
bands very narrow. 
Laganum tonganense, Valen. Mss. 
Laganum Lesueurii, Valen. Mss. ; Agassiz, Mon. Scut. ii. 116, 
t. 24, f. 3, 6, 150 ; Agassiz 8$ Desor, 1. c. 132. 
Hab. Chinese Seas. 
a, b, c, d. China. 
e,f. Smaller, covered with spine ; one rather more elon- 
gated, nearly approaching L. elegatum. Agassiz. Aus- 
tralia. Presented by J. B. Jukes, Esq. 
g, h. Small, young ; ambuiacral petals rather wider % 
China. Presented by J. Reeve, Esq. 
Yar. 1. Yery like former, but ambulacra broader, shorter, 
ovate, lanceolate. 
a. China, without spine. Mr. Argent’s Collection. 
Var. 2. Body rather elongate. 
Laganum elongatum, Agassiz, Mon. Scutelle , ii. 117, t. 24, f. 1, 2, 
150 ; Agassiz &; Desor , 1. c. 132. 
Hab. — Mus. Stokes. 
3. Laganum stellatum. 
Ambulacra rather wide, ovate, lanceolate, rather far apart at 
the crown. 
Laganum stellatum, Agassiz, Mon. Echin. ii. 122, t. 22, f. 7, 
10, 150. 
