ARCHIVOS DO MUSEU NACIONAL 
249 
Gen. PHYMOSOMA, Haime 
PHYMOSOMA BINEXILIS ( sp. nov.) 
(Est. XXVIII, fig. 4.) 
Loc. Lastro, Maroim, Provincia de Sergipe. 
Testo de tamanho moderado, de- 
presso-espheroidal; espaços interambu- 
lacraes largos, com duas series de tubercu- 
los principaes, e tambem com numerosos 
tuberculos pequenos e granulos; áreas 
ambulacraes moderadamente largas, com 
duas series de tuberculos ao longo do 
meio, sendo estes quasi tão grandes 
como os tuberculos principaes dos espa- 
cos interambuiacraes ; as zonas poriferas 
são mais largas na parte superior, onde 
os poros são dispostos em pares duplos e 
obliquos ; mas os poros são menos nume- 
rosos na parte inferior das zonas; 
tuberculos das placas proeminentes; a 
areola pequena, crenulada na margem ; 
a bossa do tuberculo pequena, proemi- 
nente, lisa e apparentemente imperfurada; 
areola pequena. 
Todos os specimens da collecção são 
imperfeitos. O maior exemplar tem um 
diametro de 40 millimetros. 
Test ofmoderate size, depressed-spher- 
oidal; interambulacral spaces Droad, 
bearing two rows of primary tubercles, 
and also numerous small tubercles and 
granules:; ambulacral areas moderately 
broad, Dearing two rows of tubercles 
along the middle, which are nearly as 
large as the primary tubercles of the 
interambulacral spaces; the poriferous 
zones are widest at Lheir upper portion, 
where the pores are arranged in oblique 
double pairs; but the pores are less 
numerous in the lower portion of the 
zones ; tubercles of the plates prominent ; 
the areola small, crenulated at its mar- 
gin: the boss of the tubercle small, 
prominent, smooth aud apparently im- 
perforate ; areola small. 
All the specimen in the coliection are 
imperfect. The largest example has 
diameter of 40 millimeters. 
PHYMOSOMA BRAZILIENSIS ( sp. nov.) 
(Est. XXVII, figs. 15, 16, 17.) 
Loc. Santa Luzia, Provincia de Sergipe. 
Testo pequeno, subgloboso, depri- 
mido, de contorno lateral circular ; áreas 
ambulacraes moderadamente largas, com 
duas series de tuberculos tendo quasi o 
Test small, subglobose, depressed, 
circular in lateral outline; ambulacral 
areas moderately broad, Dearing two 
rows of tubereles which are of about the 
V. vi.— 32 
