31 
stages in either species can hardly be overestimated, and the at- 
tention of observers at the Cape and in California is hereby re- 
spectfully called to the matter. Wither species would probably 
do well in an aquarium. Dall.] 
322 Mytilus edulis Linne 
San Diego bay; not numerous; probably introduced. 
823 Mytilus bifurcatus .See 1949. 
Abundant near high-water mark all along the coast. 
324 Modiola recta Conr 
False bay; rare. 
325 Modiolaria denticulata Dall 
San Diego (young). 
326 Adula falcata Gld 
La Playa and elsewhere in rocks. 
3827 Adula stylina Cpr 
In rocks on beaches; not rare. 
328 Lithophagus plumula Hanley 
La Playa, with pholads; rare. 
329 Lima dehiscens Conr 
Under stones, living near high-water mark, False Bay, April, 
1882. Also Todos Santos bay, but not found alive. 
330 Hinnites giganteus Gray 
This fine species we find abundant at La Playa, but elsewhere 
on the coast it appears rare, though not absent. — 
331 Placunanomia macroschisma Desh 
Usually inhabiting deep water, attached to stones or bones of 
whales. Rarely collected. 
332 Platidia anomioides (Scacchi) Costa var? 
Terebratula anomioides Scacchi, Phil Moll Sicil, ii, p 69, pl 
xviii, fig 9, 1884. 
[Mediterranean; North Atlantic; Florida Strait; San Diego, 
Cal., and Todos Santos bay, Orcutt. 
The shells which I refer to the above species are in general 
like those from the Mediterranean. The differences are such as 
might result from the habitat or place of attachment of the shells. 
All the Californian specimens have the larger valve flat, with faint 
ridges radiating from the umbo and becoming cbsole e before 
reaching the margin. The hzemal (or dorsal) valve is convex, 
and the foramen is often anteriorly angulated, though sometimes 
round. In all the specimens the part of the foramen included in 
the hemal valve is larger than that included in the neural valve. 
The apophyses are similar to those of Mediterranean specimens. 
I have from the Caribbean sea a specimen similarly radiated, and 
for this form perhaps we may apply the varietal name radiata. 
The special interest attaching to these little brachiopods arises 
from the fact that this is the first time they have been reported 
from the Pacific. The San Diego specimens were evidntly from 
the beach; though perfect, they were a little bleached. The single 
specimen from Todos Santos bay, though dry, contained the fre- 
mains of the soft parts. D.] 
