[409] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 115 
lobes or irregular branches, sometimes nearly two inches high, making 
very elegant specimens. 
Numerous sponges also occur, but they have not yet been carefully 
studied. One of the most abundantisa species of Chalina, 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 buft-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 areversed 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; 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 North 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 sulphurea. 
List of species ordinarily found on the rocky bottoms of the bays and 
sounds. 
ARTICULATA., 
Insects. 
Page. Page. 
Chironomus halophilus ..... Ay Pallen@sS 0,2 -crmisecssnte a <3 421 
Crustacea. 
Page. Page. 
Sianeer irroratus :. 2/222: Sop: |, Moora levis. =~). <=> 315 
C. borealis ....... bs eer B00 | AMMLONOE, SP o<\on. ee oh eo 415 
Panopeus depressus .....--- 395 | Amphithoé maculata ..-.... 515 
26130) er etd ae oso’ Gs oop. | Ace loOngimana,. 265 sen os 370 
PBA THUG = <a: «a= << n'e sss 395 | Unciola irrorata........... 540 
Eupagurus pollicaris......- . 395 | Cerapus tubularis (?) ....-- 596 
PEON SICALDUS «<2... 5 5 <2 395 | Caprella geometrica ....... 516 
Homarus Americanus ...... 395 |,Caprella, sp ......---- sa «| OLG 
Crangon vulgaris .......... 395 | Idotea phosphorea ......-.- 516 
Hippolyte pusiola .........- 395 | Erichsonia filiformis....... 516 
Mysis Americana .......... 396 | Balanus crenatus........-. 396 
Heteromysis formosa. ...... 396 | Numerous small Entomos- 
Lepidactylis dytiseus.... .. 339 traca. 
