480 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



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

 shells occupied by the smaller hermit-crabs. 



The curious little naked niollusk, Elysiella catulus, (Plate XXV, rig. 

 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 Zostera, cause it to be easily overlooked. 



The related species, Elysia chlorotica, (Plate XXV, fig. 172,) appears 

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

 green. The pretty Doto coronata (p. 400, Plate XXV, 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 species inhabiting the eel-grass in brackish waters. 



ARTICTJLATA. 



Insects. 



Chironomus oceanicus. 



Page, 

 379 



Crustacea. 



Page. 



Panopeus depressus 479 



P.Sayi 479 



Oallinectes hastatus 479 



Carcinus granulatus 312 



Libinia canaliculata 368 



L. dubia 368 



Eupagurus longicarpus 479 



Crangon vulgaris 479 



Virbius zostericola 479 



'Palcemonetes vulgaris 479 



Mysis stenolepis 479 



M. Americana 479 



G-ammarus mucronatus 479 



Pagt 



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 trilobns 370 



Balanus eburneus 381 



Limulns Polyphemus 340 



Annelids. 



Page. 

 320 

 319 



Lepidonotus squamatus. . . 



Podarke obscura 



Antolytus cornutus 397 



Nereis limbata 318 



Page. 



Mcolea simplex 321 



Scionopsis palmata 321 



Polycinus eximius 320 



Spirorbis, sp 323 



Nemcrteans and Planarians. 



Page. 



Polinia glutinosa 324 



Cerebratnlus, sp 324 



Pane. 



Planarian, (red sp.) 480 



Planarian, (dark green sp.) . 480 



