52 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
An ectosolenian form, that Brady has referred to the entosolenian 
L. aspera of Reuss. It is seldom met with in the tropics. 
Pacific. 1201 fathoms; rare. 
L. gracillima Srecurnza. 
L. gracillima Sxe., 1862, For. miocin. monotal. Messina, p. 51, Pl. 1, Fig. 37. 
L. gracillima Br., 1884, Chall. Rep., IX. p. 456, Pl. LVI. Figs. 19-28. 
L. gracillima Gots, 1891, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl, XXV. 9, 
p. 75, Pl. XIII. Figs. 728-7580. 
This form is not seldom met with even in tropical seas, usually associated 
with its striated allied form, Z. distoma Park. & JONES. 
Pacific. 782-1132 fathoms ; not scarce. 
Caribbean Sea. 420 fathoms; rare. 
L. striata pv’Ors., forma perlucida Montaa. 
Vermiculum perlucidum Montacu, 1803, Test. Brit., p. 525, Pl. XIV. Fig. 3. 
L. sulcata Br., 1884 (partly), Chall. Rep., IX. p. 462, Pl. LVII. Figs. 23, 26. 
L. striata f. costata Gos, 1894, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, 
p. 76, Pl. XIII. Fig. 736. 
This ectosolenian form has often been assigned to LZ. suleata Wax. & Jac. 
but that species should be ranked in the entosolenian group. It is not com- 
monly met with in the seas of the tropics. 
Pacific. 1132 fathoms ; rare. 
L. marginata Watk. & Bors. 
Serpula marginata Wax. & Boys., 1784, Test. Min., p. 2, Pl. I. Fig. 7. 
L. marginata Br., 1884, Chall. Rep., LX. p. 476, Pl. LIX. Figs. 21-23. 
L. marginata Gots, 1894, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, p. 81, 
Pl. XVIII. Figs. 748-751. 
L. marginata assumes in tropical seas relatively immense proportions in 
growth, while it is often associated with pygmy forms. The margin is some- 
times carinate or winged. Brady has presented good figures of such stout forms 
upon which many rhizopodologists should perhaps be prone to confer a special 
denomination. A variety with a few spines on the bottom margin is sometimes 
met with. It has received a special name by Schwager (Fissurina staphyllearia, 
1866, For. Kar Nikob., Novara Reise, II. Pl. V. Fig. 24). 
Pacific. 695-1201 fathoms ; not rare. 
Caribbean Sea. 382-1920 fathoms ; not rare. 
L. Orbignyana Sze. var. elongata. 
This form deviates from that of Seguenza in being flask-shaped instead of 
having a circular contour. Brady has designed such a form between the cir- 
cular ones in the Challeng. Rep., IX. Pl. LIX. Fig. 26. 
Pacific. 1132-1201 fathoms ; not common. 
