POLLICIPES. 79 
Terga subrhomboidal, broad, smooth, with the basal angle widely truncated, and 
equalling in breadth half the length of the occludent margin; the basal truncated side 
forms a right angle with the scutal margin: the uppermost part of the scutal margin forms 
a broad, rounded, slightly projecting point. 
Oxford Clay; Christian Malford and Chippenham, Wilts. Mus. J. Morris. 
This species has been named by Mr. Morris, as it appears to me, from the terga alone, 
which are well figured by him and by Mr. Sowerby: these valves (an inspection of two of 
which from Chippenham, I owe to the kindness of Mr. Morris,) are certainly quite distinct, 
in the extent to which the basal angle is truncated, and in the degree of projection of the 
uppermost part of the scutal margin, from any others which I have seen; but had they not 
been already named, according to the rule followed here, they would have been passed 
over. 
Terga subrhomboidal, or strictly pentagonal, rather broad, very flat and thin; basal 
angle truncated, extraordinarily broad, equalling half the length of the occludent margin, 
at right angles to the scutal margin; no single distinct ridge, or furrow, runs from the 
apex to the broad basal angle: upper and lower carinal margins nearly equal in length: 
occludent and upper carinal margins meet each other at right angles: occludent margin 
rather shorter than the scutal margin; with the uppermost portion of the latter slightly 
projecting in a blunt, rounded point, which corresponds with a just perceptibly convex slip 
of valve, extending along the occludent margin in the manner so common in this genus. 
Internally, the surface is smooth; scarcely even the smallest part of the apex could have 
projected freely. 
Largest specimen nearly a quarter of an inch in length. 
| Published species of Lepadide of a doubtful nature, owing to valves, not typical, having 
been named, or from the specimens having been imperfect, or from the shortness of the 
descriptions. | 
Anatifera turgida. Professor Steenstrup (in Kroyer’s Tiddskrift, 2 B. (1839), Pl. V, figs. 4—5,) has 
thus named some valves from Scania: he states that the scuta resemble in their growth those of Cineras, 
or his Anatifera crete, that is the Scalpellum? crete of this work. Therefore, I conclude that these valves 
cannot properly be ranked under Anatifera or Lepas. 
Anatifera convexa. Roemer, Norddeutsch. Kreidegebirges, Tab. XVI, fig. 7. I do not consider the 
evidence nearly sufficient to place the valve here described in the genus Anatifera; it might be one of the 
lower Latera of a species allied to Pollicipes glaber or unguis. Pictet (Traité Elementaire de Paléontologie, 
Tom. III, p. 438) states that the specimen in question is Aptychus eretaceus. Several vague notices of 
fossil species of Anatifera or Lepas have appeared at various times, but they hardly seem to deserve notice. 
