SYSTEMATIC. 
Spong. 19 
hops pachydermata S., redescribed : Topsent (50) p. 67. 
Geodia eosaster (Sollas) T., redescribed, pp. 67-69 ; G. echinastrella , n. sp,, 
described, p. 70 ; G. spherastrclla , n. sp., described, pp. 70, 71 : 
Tofsent (50). — G. steUosa : Sowinsky (46) p. 289. — G. baretti : 
SCHEPOTIEFF (42) p. 3. 
Family Stellettid^e. 
f Ophiraphidites anastomosans : Jukes-Browne & Hill (26) p. 507. 
Penares foliaformis, n. sp., diagnosed and described : Wilson (60) pp. 111- 
114. — P. sclerobesa S. E. G., redescribed : Topsent (50) pp. 82, 83. 
Pilochrota inermis y 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. tuberosa T., redescribed, Topsent (50) pp. 75-77. 
Strypknus fortis (Vosmaer) S., redescribed : Topsent (50) pp. 83-85. 
t Tethyopsis cretaceus : Jukes-Browne & Hill (26) p. 508. 
Family Theneim:. 
Thenca fenestrata (Sch.) S., redescribed, pp. 88-91 ; T. echinata , n. sp., 
diagnosed and described, pp. 91-94 ; T. lamelliformis, n. sp., diagnosed 
and described, pp. 95-98 ; T. pyriforviis , n. sp., diagnosed and 
described, pp. 98-100 : Wilson (60). — T. schmidti S., redescribed, 
p. 85 : Topsent (50). 
Family Pachastrellid^e. 
Topsent (46) includes the Theneidce and Pachastrellidce in the family 
A sterostreptidce. 
Characella pachastrelloides (Carter) S., redescribed : Topsent (50) pp. 96, 
96. 
Nethea amygdaloides (Carter) T., redescribed : Topsent (50) p. 94. 
Poecillastra compressa (Bowerbank) S., redescribed, pp. 89, 90 ; P. 
symbiotica 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. — f P. 
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 Placospongim:. 
Rhaxella perforata H. : Fox-Strangways (12) p. 40. 
(2) LITHISTIDA. 
Tribe HOPLOPHORA 
Family CladopEltid^e. 
Siphonidiwn ramosum Sch., redescribed : Topsent (50) p. 63. 
1904. [Vol. xli.] f 8 
