(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 abundant isa 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 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; 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. 
Inseets. 
Page. | Page. 
Chironomus halophilus ..... 415 | Pallene, sp..........----.- 421 
Crustacea. 
Page. | Page. 
Cancer irroratus ........... 395 | Meera levis ...........-..- 315 
C. borealis .........-..-.--05 395 | Autonoé, sp ...-...-....-- 415 
Panopeus depressus ..-.---. 395 | Amphithoé maculata ....-. 315 
Pe Saye eu sistas, telra moet boas 395 | A. longimana............- 370 
Pelia mutica........--.---- 395 | Unciola irrorata........... 340 
Eupagurus pollicaris........ 395 | Cerapus tubularis (?) ....-.- 396 
KE. longicarpus ........-..--. 395 | Caprella geometrica ....... 316 
Homarus Americanus .....- 395 | Caprella, sp ........-.+--- 316 
Crangon vulgaris ...-...... 395 | Idotea phosphorea .......- 316 
Hippolyte pusiola .........- 395 | Erichsonia filiformis....... 316 
Mysis Americana .......... 396 | Balanus crenatus.......--. 396 
Heteromysis formosa....... 396 | Numerous small Entomos- 
Lepidactylis dytiscus.... .. 339 traca. 
