[331] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. .'J7 



a few species of marine insects that are frequently met with under 

 stones, or among the small green algo3. Among these a small lead-col- 

 ored insect belonging to the family of " spring- tails," Anurida maritima, is 

 the most abundant. With it a spider, Bdella, and several species of mites 

 (Tromlndium) are often found. Several specimens of a "false scorpion, " 

 Chernes oblongus, were also found by Mr. Smith near low-water mark 

 under stones. In the pools and on the rocks, among the green conferva 

 and other sea-weeds, the active green Iarva3 of a two-winged fly, Chiron- 

 omus oceanicusj is often found in abundance. This larva we have detected 

 in the stomach of the "torn-cod," mixed with small Crustacea. 



List of species inhabiting the roclcy shores of the sounds and lays. 



In the following list the species living in these situations are brought 

 together systematically, whether mentioned in the preceding pages or 

 not. The lists are not to be regarded as complete, but include most 

 of the species ordinarily met with. The references are to the pages of 

 this report, where remarks upon the species may be found : 



ARTICULATA. 



Insects. 



Page. 



Chironomus oceanicus 331 



Anurida maritima 331 



Chernes oblongus 331 



Page. 

 Bdella marina 331 



Trombidium, several species 331 



Crustacea. 



Page. 



Cancer irroratus 312 



Panopeus depressus 312 



P.Sayi .- 312 



P. Harrisii 313 



Carcinus granulatus 312 



Eupagurus pollicaris 313 



E. longicarpus 313 



Homarus Americanus 313 



Orchestia agilis 314 



Hyale littoralis 315 



Calliopius laeviusculus 315 



Gammarus ornatus 314 



G. annulatcis 314 



G. Marinus.. 314 



Moera levis ............. , . 



Melitanitida .............. 



Amphithoe maculata ...... . 



A. valida ...... ........... 



Caprella, sp ............... 



Spha3roma quadridentata . . 

 Idotea irrorata ........... 



I. phosphorea . ............ 



Erichsonia filiformis ....... 



Epelys montosus .......... 



Jaera copiosa ........... ... 



Balanus balanoides ........ 



Numerous small Entomos- 

 traca. 



Page. 

 315 

 314 

 315 

 315 



315 

 316 



316 



315 

 304 



