XXX ILLUSTRATIONS 



FIGURE PAGE 



576. A characteristic type of shore Hving sea Worm {Amphinomc pallasii). 

 From A. Agassiz : 196 



577. A brilliantly phosphorescent arctic Copepod {Mdridia armata). Yxom 

 Nordenskjold 196 



578. A free-living or pelagic Copepod. From A. Agassiz 196 



579. One of the young stages of the common Green Crab {Card it us macnas). 

 From A. Agassiz 196 



580. The same stage of another Crab (Porcellana) . From A. Agassiz 196 



581. A young stage of a Hermit Crab {Pagurus). From A. Agassiz 196 



582. A larval Crustacean (Panopiis). From A. Agassiz 196 



583. A young Acorn Barnacle {Balanus). From A. Agassiz 196 



584. A discodrilid Worm {CcratodrUiis thysanosomus) parasitic on a Crayfish, 

 dorsal view. From Hall, U. S. N. M 198 



585. The same, ventral view. From Hall, U. S. N. M 198 



586. The Giant Squid {Architcuthis princeps). From A. Agassiz, after 

 Verrill 200 



587. Another type of Squid {Mastigoteiithis agassizii). From A. Agassiz, 

 after Verrill 200 



588. A curious little Cuttle-fish {Nectotenthis pourtalesii) . From A. Agassiz, 

 after Verrill 200 



589. A Paper Nautilus (Argonauia) without its shell (see figs. 591-593). 

 From A. Agassiz, after Verrill 200 



590. The shell of a small Cuttle-fish (Spirula peronii) living in rather deep 

 water; these and similar shells are very common on all tropical beaches, 

 but the animal is very seldom found; the shell is entirely within the 

 animal. From A. Agassiz 200 



591. An unusually handsome Paper Nautilus {Argonaiita expansa) from the 

 Gulf of California (see fig. 589). From Dall, U. S. N. M 204 



592. The same, from above. From Dall, U. S. N. M 204 



593. The same, from below. From Dall, U. S. N. M 204 



594. A Gastropod {Chrysodomiis variciferus) . From Dall, U. S. N. M 206 



595. Another view of the same. From Dall, U. S. N. M 206 



596. A Gastropod {Anti planes thalaea). From Dall, U. S. N. M 206 



597. A Gastropod {Thais lamcllosa). From Dall, U. S. N. M 206 



598. A Gastropod {Murex carpenleri). From Dall, U. S. N. M 206 



599. A Gastropod {Tricholropis coronata). From Dall, U. S. N. M 206 



600. A Gastropod {Tritonalia barbarensis). From Dall, U. S. N. M 206 



601. A Gastropod {Neptunea pacifica). From Dall, U. S. N. M 206 



602. A Gastropod {Neptunea avalonensis). From Dall, U. S. N. M 206 



603. A Gastropod {Epitonium saicinac). From Dall, U. S. N. M 206 



604. A Gastropod {Thais canaliculata). From Dall, U. S. N. M 206 



605. A Gastropod {SolaricUa triplostcphanus). From Dall, U. S. N. M 206 



606. The same, seen from below. From Dall, U. S. N. M 206 



607. A curious shell {Tylodina fungina). From Dall, U. S. N. M 206 



608. The same, from above. From Dall, U. S. N. M 206 



609. The same, from below. From Dall, U. S. N. M 206 



610. Another curious shell {Williamia pelloides). From Dall, U. S. N. M. . . 206 



