on the Coast of New England. 409 
Among the Mollusks are several very interesting species, 
some of them new to the fauna of our coast; Anachis Haliceti 
(Jeff. sp.) occurred in 114 fathoms (loc. 24), but was found in 
greater numbers on Cashe’s Ledge (loc. 21), where several fine 
specimens were dredged; Siphonodentalium vitreum occurred 
sparingly at several localities in 60 to 107 fathoms ; Lasea rubra 
was only once met with (loc. 36), in 142 fathoms; Crenella 
decussata was less frequent than in our dredgings off Casco 
ay; Daerydium vitreum occurred sparingly several times in 60 
to 142 fathoms (loc. 12, 9, 36), and also in our dredgings off 
Casco Bay, in 95 fathoms. ‘These five shells are all new addi- 
tions made this season to the fauna of the United States, and the 
nachis and Lasea have not been found previously on this side 
of the Atlantic, so far as known to me: the others have recently 
been dredged in the Gulf of St. Lawrence by Mr. Whiteaves. 
mong the Tunicates were several fine specimens of (lan- 
dula fibrosa Stimpson, and also an apparently undescribed 
species of Ascidia* ‘ 
(fig. 2), remarkable rated 
for its so and gS 
m oO S 
: g \ = 
Inoderms there are SSS 
several interesting 
Holothurians : the : . 
rare Stereoderma unisemita occurred in 142 fathoms (loc. 36) ; 
Several large specimens of Molpadia odlitica were obtains = 
95 fathoms (loc. 20); and one specimen of Oligotrochus gee 
Sars occurred in 60 and 105 fathoms (loc. 12 and 7 d : 
last named species had been known before only from the deep 
* Ascidia mollis Verrill, sp. nov. Figure 1. oe 
_ Body large, hemispherical or subglobular, attached obliquely by var ee 
integument rather thin, soft, and somewhat translucent, with st rture 
Smooth, but more or‘less wrinkled. Color, pale oli 8 ae ae ; 
neat one end, large, slightly elevated, seen ht cgemcape abaery relatively 
orifice placed to one side of the middle o eter of body usually one to two 
inches, ocalities Casco 
"Common in 48 to 107 fathoms, attached to boulders in many | - 
Bay, off Manheigan L,, at Jeffrey’s Bank, Cashe’s Ledge, etc. 
