198 
PACIFIC SCIENCE, VoL XIX, April 1965 
microxea differs from T. monodi and T. oxeata 
in that the supplementary oxeas are small and 
have the same distribution as the microscleres, 
in the great rarity of triaenes, and in details of 
body shape, color, and surface. Tetilla rubra 
Kieschnick differs in lacking the spiny surface, 
in having abundant triaenes and in having cal- 
throps in the basal rooting tufts, the latter 
characteristic suggesting that this species be- 
longs in Paratetilla. 
The genus Tetilla is understood here in the 
sense of Sollas (1888) and Wilson (1925). 
The synonymy of Craniella Schmidt with Tetilla 
Schmidt has not been satisfactorily demon- 
strated, neither have good reasons been pro- 
duced to uphold the use of two separate fam- 
ilies, Craniellidae and Tetillidae as de Lau- 
benfels (1936) proposed. 
GENUS Paratetilla Dendy 
Paratetilla bacca (Selenka) 
Fig. 34 
RESTRICTED SYNONYMY: 
Stelletta bacca Selenka, 1867, p. 569, pi. 35, 
fig. 14, 15. 
Tetbya merguiensis Carter, 1883, p. 366, pi 
15, figs. 6-8. 
non Tetilla merguiensis Topsent, 1897, p. 
437. 
Tetilla bacca Lindgren, 1898, p. 328. 
Paratetilla bacca Dendy, 1905, p. 97. 
Paratetilla bacca Dendy, 1921, p. 21. 
Paratetilla bacca Kumar, 1925, p. 217. 
Paratetilla bacca Burton, 1959, p. 200. 
OCCURRENCE: Sta. 47. 
DISCUSSION: The single specimen in this 
collection is extremely close to Paratetilla cineri- 
formis Dendy from Ceylon and P, eccentrica 
Row from the Red Sea in features of general 
morphology and spiculation. Dendy (1921) 
has referred P. cineriformis, with many other 
forms, to P. ( Stelletta ) bacca Selenka and there 
is little that need be said to supplement his 
work. Those points which can be criticized 
have been dealt with by Wilson (1925). It is 
