REPOET ON THE TETRACTINELLIDA. 
57 
Tabular Vieiv of the Tetillidse — continued. 
Oxea. 
Protrieene. 
Anatrisene. 
Sigmaspire. 
Microrhabd. 
Somal. 
Cortical. 
(yS) Sigmaspires from O'Ol to 0‘02 mm. 
in length. 
30. Craniella ahyssorum (Cr.), . 
4-3 
0-7 
4-3 
6-5 
20 
31. Craniella cranium,, auctt., . 
1 2-1 
1 4-3 
0-83 
0-9 
3-2 
5-4 
2-1 
11*4 
9 
12 
32. Craniella sclimidtii, n. sp.. 
2-2 
present 
present 
present 
20 
(y) Sigmaspires over 0*02 mm. in 
length. 
33. Craniella tethy aides, 0. Sch., 
present 
present 
present 
present 
35 
(3) Sigmaspires large and sptned. 
34. Craniella atropurpurea (Cr.), 
3-57 
1-25 
5-0 
5-0 
62 
The measurements give the length of the megascleres in millimetres, of the microscleres in micro- 
millimetres. 
Family II. S a m i d a:. 
Sigmatophora in which the characteristic megascleres are amphitrisenes. 
Genus Samus. 
Samus anonymus, Gray. 
Bowerbank, Spicule of an Unknown Sponge, Mon. Brit. Spong., vol. i. p. 234, pi. ii. figs. 41, 42. 
Samus anonyma, Gray, Proc. Zool. Soc. Bond., p. 526, 1867. 
„ „ Carter, Ann. and Mag. Nat. Hist., ser. 5, vol. iiL pp. 350-352, pi. xxix. 
figs. 1-4, 1879. 
Samus anonymus, Carter, Ann. and Mag. Nat. Hist., ser. 5, vol. vi. p. 59, 1880. 
Sponge excavating. 
Spicules. — I. Megascleres. 1. Amphitrisene ; rhabdome cylindrical, 0‘08 by 0’0375 
mm.; cladome with trichotomate cladi ; protocladi 0'043 mm. long, deuterocladi 0*075 
mm. long.; chord 0‘16 mm. 
2. Heteropolar amphitrisene ; rhabdome cylindrical, 0*0197 mm. long, the cladome 
at one end with simple cladi, at the other with trichotomate cladi; simple cladi 0*024 
mm. long; trichotomate cladi, protocladi 0*016 mm. long, deuterocladi 0*016 mm. 
long. 
II. Microsclere. 3. Sigmaspire, smooth, 0*012 mm. long. 
Habitat. — Bahia. 
(zool. CHALL. exp. — PART LXIII, — 1887.) 
Rrr 8 
