SYSTEMATIC. 
Spong. 19 
Isops pach^dermata S., redescribed : Topsbnt (50) p. 67. 
Oeodia eosaster (Sollas) T., redescribed, pp. 67-69 ; G. echinastrella, n. sp., 
described, p. 70 ; G. spherastrella, n. sp., described, pp. 70, 71 : 
ToPSENT (50). — G. stellosa : Sowinsky (46) p. 289. — G. haretti : 
SCHEPOTIEFF (42) p. 3. 
Family Stellettid^. 
•\Ophimphidites anastomosans : Jukes-Browne & Hill (26) p. 507. 
Penares foliaformis, n. sp., diagnosed and described : Wilson (60) pp. 111- 
114. — P. sclerohesa S. E. G., redescribed : Topsent (50) pp. 82, 83. 
Pilochrota inermis, n. sp., described, pp. 79, 80 ; P. ventricosa, n. sp., 
described, pp. 80, 81 ; P. lactea (Carter) S., redescribed, pp. 81, 82 : 
Topsent (50). 
•\Stelletta inclusa : Jukes-Browne & Hill (26) p. 508 and Rowe (40) 
p. 293.— *S'. tuherosa T., redescribed, Topsent (50) pp. 75-77. 
Stryphnus fortis (Vosmaer) S., redescribed : Topsent (50) pp. 83-85. 
\Tethyopsis cretaceus : Jukes-Browne & Hill (26) p. 508. 
Family THENEiDiE. 
Thenea fenestrcUa (Sch.) S., redescribed, pp. 88-91 ; T. echinata, n. sp., 
diagnosed and described, pp. 91-94 ; T. lamelliformis, n. sp., diagnosed 
and described, pj). 95-98 ; T. pyriformis, n. sp., diagnosed and 
described, pp. 98-100 : Wilson (60). — T. schmidti S., redescribed, 
p. 85 : Topsent (50). 
Family Pachastrellid^. 
Topsent (46) includes the Theneidoe and PachastrelUdce in the family 
A sterostreptidce. 
Characella pachastrelloides (Carter) S., redescribed : Topsent (50) pp. 95, 
96. 
Nethea amygdaloides (Carter) T., redescribed : Topsent (50) p. 94. 
Poecillastra compressa (Bowerbank) S., redescribed, pp. 89, 90 ; P. 
symhiotica T., redescribed, pp. 90-92 : Topsent (50). — P. tricornis, 
n. sp., diagnosed and described, pp. 101-105 ; P. cribraria^ n. sp., 
diagnosed and described, pp. 105-110 : Wilson (60). 
Pachastrella monilifera S., redescribed : Topsent (50) pp. 92-94. — fP. 
convoluta : Jukes-Browne & Hill (26) p. 507. 
Sphinctrella gracilis S., redescribed, pp. 88, 89 ; S. horrida S., redescribed, 
p. 86 ; S. ornata S., redescribed, p. 87 : Topsent (50). 
Family Placospongid^. 
Rhaxella perforata H. : Fox-Strangways (12) p. 40. 
(2) LITHISTIDA. 
Tribe HOPLOPHORA 
Family Cladopeltid^. 
Siphonidium ramosum Sch., redescribed : Topsent (50) p. 63. 
1904. [Vol. xli.] f 8 
