REPORT OF THE ECHINOIDEA—MORTENSEN 139 
type, and I must refer to the description of the species which will 
be given in volume 5 of my Monograph of the Echinoidea. It must 
suffice here to state that the species is characterized by its unusually 
low test, the numerous primary aboral tubercles (spines), and the 
very uniform fine granulation of the aboral side. The oral side is 
flat, not at all sunken toward the peristome. The labrum has a 
narrow posterior prolongation, reaching almost to the end of the 
third plate of the adjoining ambulacra. The sternum is tuberculated 
only in its posterior part. The primary spines are banded with narrow 
purplish bands. ~ 
Genus BRISSUS Klein 
BRISSUS LATECARINATUS (Leske) 
Brissus carinatus A. Acassiz, Revision of the Echini, p. 596, pl. 21a, figs. 1-3, 
1873. 
Brissus latecarinatus H. L. CLARK, Hawaiian and other Pacific Echini, Echi- 
noneidae .. . Spatangidae, p. 219, pl. 146, fig. 15, 1917; Catalogue of the 
Recent sea-urchins in the British Museum, p. 219, 1925. 
Locality—Catbalogan, Samar, shore; April 16, 1908. One young 
specimen. 
Genus METALIA Gray 
METALIA STERNALIS (Lamarck) 
Metalia sternalis A. AGAssiz, Revision of the Echini, p. 600, pl. 21a, figs. 4, 5; pl. 
21e, figs. 5-9, 1873—H. L. CiarK, Hawaiian and other Pacific Echini, 
Echinoneidae . . . Spatangidae, p. 209, pl. 146, fig. 30, 1917; Catalogue of the 
Recent sea-urchins in the British Museum, p. 216, 1925. 
Locality —Station 5159, Tinakta Island, Tawi Tawi Group (lat. 
5°12’ N., long. 119°54’ E.); 18 meters; February 21, 1908. One 
medium-sized specimen, 40 mm. long. 
The specimen has only five tube feet to each side within the subanal 
plastron, as against nine or ten in adult specimens. 
METALIA SPATAGUS (Linnaeus) 
Metalia maculosa A. AGAssiz, Revision of the Echini, p. 598, pl. 21b, figs. 8, 9, 
1873. 
Metalia spatagus LovEN, Bihang Svenska Vet.-Akad. Handl., ser. 13, vol. 4, No. 5, 
p. 162, pl. 6, fig. 1, 1887.—H. L. CLarK, Hawaiian and other Pacific Echini, 
Echinoneidae ... Spatangidae, p. 210, 1917; Catalogue of the Recent sea- 
urchins in the British Museum, p. 216, 1925. 
Locality—Station 5160, Tinakta Island, Tawi Tawi Group (lat. 
5°12’40’’ N., long. 119°55’ E.) ; 22 meters; February 22, 1908. One 
young specimen, 20 mm. long. 
Remarks.—This specimen has already the genital pores fully de- 
veloped. The subanal fasciole is very distinct; there are three tube 
