480 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



may be found, both adhering to the leaves of eel-grass and attached to 

 shells occupied by the smaller hermit-crabs. 



The curious little naked mollusk, JElysiella catulus, (Plate XXY, lig. 

 171,) is often quite common on the leaves of eel-grass in our harbors. 

 It also has the power of floating with the bottom of the foot at the 

 surface of the water. Its small size and bright green color, like that 

 of the growing leaves of the Zoster a, cause it to be easily overlooked. 



The related species, Elysia cMorotica, (Plate XXY, fig. 172,) appears 

 to have similar habits, but is much less common. Its color is also 

 green. The pretty Doto coronata (p. 400, Plate XXY, fig. 170) also 

 occasionally occurs on the leaves of eel-grass. 



A green Planarian is frequent on the eel-grass, and also a bright red 

 species. 



List of siwcies inhahiting the eel-grass in hracliish tvaters. 



Ohironomus oceanicus 



ARTICULATA. 



Insects. 



Page. 

 379 



Cr2istacea. 



Page. 



Panopeus depressus ... 479 



P. Sayi..... 479 



Callinectes hastatus 479 



Garcinus granulatus 312 



Libinia canaliculata 



L. dubia 



Eupagurus longicarpus . . . 



Crangon vulgaris 



368 

 368 

 479 

 479 

 479 

 479 



Yirbius zostericola 



PaUemonetes vulgaris 



Mysis stenolepis 479 



M. Americana , 479 



Gammarus mucronatus 479 



Page. 



Melita nitida 479 



Microdeutopus minax 479 



Amphithoe valida 315 



A. longimana 370 



A. compta 370 



Corophium cylindricum 370 



Caprella geometrica 382 



Idotea irrorata 479 



Erichsonia attenuata 479 



Epelys trilobus 370 



Balanus eburneus 381 



Limulus Polyphemus 340 



Annelids. 



Page, j Page. 



Lepidonotus squamatus 320 \ Xicolea simplex 321 



Podarke obsciira 319 j Scionopsis palmata 321 



Autolytus cornutus 397 | Polycinus eximius 320 



Xereis limbata 318 j Spirorbis, S]) 323 



Ncmerfeans and ri<()i((ri((ns. 



Polinia fflutinosa 



Page. 

 324 



Cerebratulus, sp 324 



Planarian, (rod sp.) 



Planariau, (dark green sp.) . 



l\ige. 

 480 



480 



