mVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 409 



lobes or irregular branches, sometimes nearly two inches high, making 

 very elegant specimens. 



I^umerous sponges also occur, but they have not yet been carefully- 

 studied. One of the most abundant is a species of Challnaj which grows 

 up in clusters of slender, soft, smooth branches, five or six inches 

 high, and from a quarter to half an inch in diameter, of a pale 

 yellowish or buff-color while living. It makes very delicate, white, and 

 beautiful specimens when the animal matter has been thoroughly washed 

 out and the sponge dried in the sun, which can be best done by hang- 

 ing them up in a reversed position, owing to the flexibility of the branches 

 when wet. This species is closely related to the Chalina oculata^ which 

 also occurs in this region, in the outside cold waters, as off Gay Head, 

 and is abundant farther north and on the coast of Europe j but the pre- 

 sent species is much more delicate, with more slender and rounder 

 branches, and it seems to be a southern form, for it is common all along 

 our coast as far, at least, as ]S^orth Carolina. 



The common, irregularly branched, red sponge is found in abundance, 

 and also several light yellow, irregular, soft, massive species of Tedania,, 

 and the firm, massive, sulphur-yellow Cliona sulplmrea. 



List of species ordinarily found on the roclty bottoms of the hays and 



sounds. 



ARTICULATA. 



Insects. 



Page. I 

 Chironomus halophilus 415 i Pallene, sp 



Page. 

 421 



Crustacea. 



Page. 



Cancer irroratus 395 



C. borealis 395 



Panopeus depressus 395 



P. Sayi 395 



PeUa mutica 395 



Eupagurus pollicaris 395 



E. longicarpus 395 



Homarus' Americanus 395 



Crangon vulgaris 395 



Hippolyte pusiola 395 



Mysis Americana 396 



Heteromysis formosa .... 396 



Lepidactylis dytiscus 339 



Page. 



Mcera levis 315 



Autonoe, sp 415 



Amphithoe maculata 315 



A. longimana 370 



Unciola irrorata 340 



Cerapus tubularis (?) 396 



Caprella geometrica 316 



Caprella, sp 316 



Idotea i)hosphorea 316 



Erichsonia filiformis 316 



Balanus crenatus 396 



Numerous small Eutomos- 

 traca. 



