408 S. A. Hurlbut—Earthquake at Bogota. 
Onchidoris pallida. 
Doris pallida Ag., in Gould, op. cit., p. 229, Pl. xx, figs. 284, 287, 288, 291. 
This species was dredged in 20 fathoms in Eastport harbor. 
It has much larger tubercles than either of the preceding. 
Doridella, gen. nov. 
Body covered with an ample, smooth mantle, oval, convex 
Dorsal tentacles retractile, without sheaths. Head prominent, 
the lateral angles prolonged anteriorly as short oral palpi or 
tentacles. Foot broad, cordate. Sep posterior, in the 
groove between the mantle and foo 
Doridella obscura, sp. nov. ee 2 and 3. 
Form broad oval, ‘3 of an inch-long and ‘2 broad; back co 
vex, smooth. Foot broad, cordate in front. Oral disk peed 
emarginate or with concave outline in front; 
2 ‘angles somewhat produced, forming 
short, tentacle- like organs, which in exten- 
toward the edge, as if covered with Rie 
cles white ; the central part of body, beneath, bright yellow. 
Savin Rock, near New Haven, Oct. 28, : —k, T. Nelson. 
The eggs, laid in confinement, were very small, a 
pale yellow, numerous, arranged in an open coil, 
(figure 3). 
This is the only Nudibranch hitherto — 
in the vicinity of New Haven. It appears to be al- 
lied to Phyllidia and Fryeria, which are caulk re- 
ferred to the Tectibranchs. 
Art. XLVIL—On a recent Earthquake at Bogota ; by the Hon. 
S. A. Hurupot, U.S. Minister to Columbia. 
; but "U. 
ter to Columbia, has been kindly furnished to us oe the Siafenee 
of the Smithsonian Tostitution, to whom it was addre ] 
We have had rather an unusual phenomenon at a place in 
a remarkably well developed earthquake. At about 10 minutes 
before 10 P. Mm. of the evening of the 4th of April (Saturday), 
and without any previous warning that we = noticed, there 
Figure 2.—Doridella obscura Verrill, enlarged two diameters ; a, upper surface; 4, 
lower surface. 
Figure 3.—Eggs of D. obscura, enlarged two diameters. 
