DALL: MOLLUSCA AND BRACHIOPODA. 439 
Bursa cruentata Sowerby. 
Cymatium aquatile Reeve. 
Cymatium rubecula Lamarck. 
Cerithium echinatum Lamarck. 
Littorina obesa Sowerby. 
Modulus tectum Gmelin. 
Cheilea equestris Linné. 
Nerita plicata Linné. 
Turbo argyrostomus Linné. 
Astraea confragosa Gould. 
Pecten (Chlamys) pallium Linné. 
Melina costellata Conrad. 
Arca reeveana Orbigny. 
Jagonia ramulosa Gould. 
Tridacna squamosa Lamarck. 
Trapezium guiniacum Lamarck. 
For assistance in identifying the species in the above lists, I am indebted to 
Mr. W. B. Marshall of the National Museum. 
BRACHIOPODA. 
NEOTREMATA. 
Discinacea. 
Discinidae. 
DISCINISCA Dat. 
DISCINISCA s. s. 
Discinisca lamellosa Broperrr. 
A dead valve was dredged off the Peruvian coast at U. 8. S. “ Albatross ” station 
4672, in 2845 fathoms, but it is probable that it was drifted from shallow water, 
or was disgorged by a fish, as these common species of Discinisca are known to 
live only in very moderate depths. 
Discinisca strigata BropeErRip. 
A specimen of this species was obtained on the shore, between tides, on one of 
the islands of Panama Bay, by the “ Albatross,” party. The species ranges from 
the Gulf of California to Peru and has been found at San Diego, California, in the 
vicinity of the marine railway, where it is believed to have been scraped off the 
bottom of one of the small vessels which trade in the Gulf of California from San 
Diego, and which are cleaned there frequently ; at all events it has not become 
acclimated in San Diego harbor. 
