Solenogaster Mollusks — -Schwabl 
s : 
4776 (1) in 167.1 m, with Crystallophrisson 
sp. 
4778 (1) in 215 8 m. with C. sp. 
4835 (1) in 140 m. 
DIAGNOSIS: The body is short, about 10 mm 
long; the radula is very large, distichous, and 
has 28 transverse rows. This organ with its 
muscles is heavier than that in L. talpoides. 
Dorsal salivary glands are present. The stomach 
and digestive glands are well developed and 
distinct from the intestine. Color is slate gray 
with a yellowish cast. Spicules from the middle 
of the body measure 0.5 mm long. The length 
index is 1. 3-4.7. 
DISTRIBUTION : Two individuals were re- 
ported by Heath (1911) from southern Cali- 
fornia in 260-284 fm. The present collection 
contains 64 specimens; 14, or 21.9'%, come 
from depths of 77 and 150 fm; 31, or 48.8%, 
263 
are in 150 to 245 fm; 19, or 29.7%, in depths 
greater than 245 and 450 fm. The habitats are 
on various substrata, but certain kinds were 
selected: 52 individuals, or 81.2%, on clay, 1 
on silt, 1 on rocks and mud, and 3 on clayey 
mud. 
The station numbers refer to localities that 
are either in the San Pedro channel area (Fig. 
2), in Santa Monica Bay to the north, or in 
Redondo canyon or the San Pedro Sea valley. 
GENUS Plathymenia Schwabl, 1961 
Type P. branchiosa Schwabl, 1961 
Schwabl, 196l7‘. p. 100, figs. 1-5. 
Neomeniid with short and plump body; the 
spicules are hollow needles. The body has a 
subterminal atrial opening and a terminal slit- 
like dorsoventral cloacal opening. Cirri in the 
atrial chamber are reduced; the fore-gut is 
- 33 % 0 ' 
35 ® 2 $ - 
Fig. 2. The San Pedro area between the mainland of southern California and Santa Catalina Island, show- 
ing the distribution of species of solenogasters in different locations. Other data are from Hartman, 1955. 
