186 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [480] 
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, Elysiella catulus, (Plate XXYV, fig. 
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-X XV, 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. 
ARTICULATA. 
Insects. 
Page. 
(Chironomus oceanicus:. 2 2.2. -2-5. 2.45% a danse ae eb a ee shes PERN ARO ae 
Crustacea. 
Page. Page 
Panopeus depressus...-.-- 479] Melita nitida..... pc Sea 479 
EELS, eae eee epee 479| Microdeutopus minax...... 479 
Callinectes hastatus ......-. 479| Amphithoé valida.....-... 315 
Carcinus granulatus..-..-.. B12), A. ORSTMOANAS.. .. cu. ieee 370 
Libinia canaliculata .....- - 368 | As. COMM Gai crate one Eee * 370 
gh 0 02 eee a ee TP 368| Corophium cylindricum.... 370 
Eupagurus longicarpus.... 479] Caprella geometrica..-.-.... 382 
Crangon vulgaris... ..-.....\- 479| Idotea irrorata...... eae ae 479 
Virbius zostericola......-. 479| Erichsonia attenuata...... 479 
Palemonetes vulgaris...... 479| Epelystrilobus.......-.... 370 
Mysis stenolepis........--.- 479| Balanus eburneus..-....-... 381 
M. American an 222-2 - 50 479| Limulus Polyphemus...... 340 
Gammarus mucronatus.... 479 ' 
Annelids. 
Page. Page. 
Lepidonotus squamatus.... 320} Nicolea simplex........... 321 
Pogerce. ODSCura... aco 319; Scionopsis palmata......-. 321 
Autolytus cornutus........ 397 | Polycinus eximlus...... en 32 
Nereis limbata...........- 318 | SPIEOLOIS,. SP. o.oo oe a2 
Nemerteans and Planarians. 
Page. Page. 
Polinia glutinosa..... an 324| Planarian, (red sp.).-..--.. 480 
Cerebratulus isp. -.-en n> - 324| Planarian, (dark greensp.). 480 
