DA.LL: MOLLUSCA AND BRACHIOPODA. 439 



Bursa cruentata Sowerby. 

 Cymatium aquatile Keeve. 

 Cymatium rubecula Lamarck. 

 Cerithium ecliinatum Lamarck. 

 Littorina obesa Sowerby. 

 Modulus tectum Gmelin. 

 Cheilea equestris Linne. 

 Nerita plicata Liiine. 

 Turbo argyrostomus Linne. 

 Astraea confragosa Gould. 

 Pecten (Chlamys) pallium Linn^. 

 Melina costellata Conrad. 

 Area reeveana Orbigny. 

 Jagonia ramulosa Gould. 

 Tridacna squamosa Lamarck. 

 Trapezium guiniacum Lamarck. 



For assistance in iflentifying the species in the above lists, I am indebted to 

 Mr. W. B. Marshall of tlie National Museum. 



BRACHIOPODA. 



NEOTRBMATA. 



Discinacea. 



Discinidae. 

 DISCINISCA Dall. 



DISCINISCA 8. s. 



Discinisca lamellosa Brodkrip. 



A dead valve was dredged off the Peruvian coast at U. S. 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 Brodbrip. 



A specimen of this species was obtained on tlic 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 whicli arc cleaned there frequently ; at all events it has not become 

 acclimated in San Diego harbor. 



