FISHERY INDUSTRIES OF THE UNITED STATES, 1931 433 



Common and scientific names of the commercial fishery -products caught in the 

 United States and Alaska — Continued 



Common name as shown 

 in bureau reports 



Other common names 



Scientific names 



Crabs: 

 Stone. 

 Soft... 



Hard. 



King 



Spider 



Crawfish 



Lobsters: 

 Common. 



Spiny 



Mussels: 



Soft-shelled crab, blue crab. 

 Hardshell crab, blue crab.. 



Dungeness crab 



Rock crab, hard crab 



Horseshoe crab 



Toad crab 



Crayfish 



Rock lobster, crayfish. 



Freshwater. 



Octopus 



Oysters: 



Eastern.. 



Western 



Japanese (introduced). 



Periwinkles 



Scallops: 



Sea 



Olympia. 



Bay. 



Shrimp. 



Snails 



Squid.- 



Turtles: 



Green 



Loggerhead. 



HawksbilL-. 



Snapping... 



Terrapin 



Frogs 



Irish moss _. 



Kelp 



Mud turtle, mossback... 

 Diamond-back terrapin . 



Sponges: 

 Glove- 



Grass 



Sheepswool. 



Yellow 



Trepang 



Sea cucumber. 



Menippi mercenaria. 



Callinectes sapidus. 

 Do. 



Cancer magister (Pacific coast). 



Cancer irroratus (Atlantic coast). 



Limulus. 



Hyns coarctatus. 



fCambarus species (Atlantic coast). 

 \Astacus species (Pacific coast). 



Homarus americanus (Atlantic coast). 

 (Pamdirus interruptus (Pacific coast). 

 \Panidirus argus (Atlantic coast). 



(Mytilus californianus (Pacific coast). 

 \Mytilus edulis. 

 [Quadrula species. 

 iLampsilis species, 

 i Symphynota species. 

 (Unio species. 

 Octopus punctatus (Pacific coast)* 



Ostrea elongaia. 



Ostrea lurida (Pacific coast). 



Ostrea gigas. 



Littorina species. 



Pecten magellanicus. 

 IPecten irradians (Atlantic coast). 

 {Pecten lequisulcatus (Pacific coast). 



Peneus setiferus. 



Peneus brasiliensis (Atlantic and 

 Gulf coasts). 



Pandalus species (Pacific coast). 



Pandalopsis species (Pacific coast). 

 .Crangon species ( Pacific coast) . 



Gastropoda species. 

 (Loligo opalescens (Pacific coast). 

 \Loligo pealei (Atlantic coast). 



Chelonia mydas. 



Thalassochelys caretta. 



Chelonia inbricata. 



Chelydra serpentina. 



Malacoclemmys palustris. 



Rana species. 



Chondrus crispus. 



Macrocystis species; Nereocystis spe- 

 cies; Pelagophycus species; Alaria 

 species. 



Spongia graminea (Hyatt) Euspongia 



officianalis (L.). 

 Hippospongia equina cerebriformis. 

 Hippospongia canaliculata gossypina. 

 Hippospongia equina elastica. 

 Cucumaris frondosa; Thyone briareus. 



STATISTICAL SURVEY PROCEDURE 

 METHODS OF COLLECTION 



In order that persons using the statistics in this report may judge 

 as to their completeness and authenticity, there follows an outline of 

 the methods employed by the bureau in collecting fishery statistics. 

 It will be noted that several methods are used. Each method has 

 been carefully studied to obtain the best results with the available 

 personnel. 



General fishery statistics. — In the collection of general fishery sta- 

 tistics, data are obtained on the catch of fishery products and its value 



