480 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



may be fonud, both adheriug to the leaves of eel-grass and attached to 

 shells occupied by the smaller hermit-crabs. 



The curious little naked molkisk^_E/^6^eZ/« catulKs, (Plate XXV, tig. 

 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, Ehjsia 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 XXV, tig. 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. 



TAst of species inhahiiing the eel-grass inhmcMsh waters. 



ARTICULATA. 



Insects. 



Chironomus oceanicus. 



Page. 

 379 



Crustacea. 



Page. 



Panopeus depressus 479 



P. Sayi 470 



Callinectes hastatus 479 



Carcinus grauulatus. 312 



Libinia canaliculata 3G8 



L. dubia 368 



Eupagurus longicarpus 479 



Craugon vulgaris .... . 479 



Virbius zostericola 479 



Paltemonetes vulgaris 479 



Mysis stenolepis 479 



M. Americana 479 



Gammarus mucronatus. . . 479 



Page. 



INIelita 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 eburueus 381 



Limulus Polyphemns 340 



Annelids. 



Page. 



Lepidonotus sqnamatus 320 Xicolea simplex. . . 



Podarke obscura 319 Scionopsis palmata. 



Autolytus cornutus 397 Polycinus eximius. 



Xereis limbata 318 Spirorbis, sp 



Page 



321 

 321 

 320 



323 



yemerteans' and Planarians. 



P^ge. 



324 



Cerebratulus, sp 321 



Polinia srlutinosa. 



Planarian, (red sp.) 



Planarian, (dark green sp.) 



Page. 

 480 

 480 



