62 AMERICAN JOURNAL 



extreme variety. The normal form is remarkable for its elon- 

 gated form, nodulous strong ribbets, large triangular foramen, 

 straight hinge line and Pecten-\ike auriculation of the valves. It 

 is very close to T. michelottina, Dav., Mon. It. Tert. Brach., p. 

 14, 1870, and they may be identical. It is hardly necessary to 

 observe that it is perfectly distinct from T. caput- serpentis. The 

 soft parts were crammed with spiculse ; one specimen had an 

 enormously lengthened peduncle with a second attachment, like 

 that of an ivy to a stone, half way between the terminal attach- 

 ment and the shell. The occasion of this abnormal growth ap- 

 peared to be the growth of a sponge upon the stones, which, but 

 for the lengthening of the peduncle, would have enclosed the 

 brachiopod and perhaps have killed it. 



Genus AGULHASIA, King. 



Agulliasia, King, Am. Mag. Nat. Hist., 4th Series, vii, p. 109, 

 1871. 

 " Areigerous. Beak pointed. Deltidium closed by a plate 

 fixed to the inner surface of the area. Foramen at the cardinal 

 termination of the deltidium. Loop short, reflexed. and attached 

 to the hinge by two crura. Shell substance permeated by branch- 

 ing tubuli." 



Type Agulliasia Davidson?', King, 1. c. p. Ill, PL xi, f. 1-8, 

 Feb., 1871. 



Hah. Agulhas Banks, south coast of Africa. 



The above is Prof. King's diagnosis of a very minute shell (*25 

 inches in greatest length) which, from its solidity, appears to him 

 to be mature. I trust I shall not be considered hypercritical in 

 making the observation that, it appears to me to be a young 

 Terebratulina, in which the crura have not become united, and 

 which, nevertheless, is abnormally calcified. The fry of all the 

 Terebratulidos present a very similar appearance. The loop is 

 that of a typical Terebratula but is perhaps immature^ or the 

 very delicate connecting band may have been broken away. 

 Such fractures are very common, and I have examined a very 

 large series of adult Waldheimia cranium, for instance, in vain 

 for a single perfect example with the reflexed portion of the loop 

 in its place. Mr. Jeffreys has had the same experience, as he 

 relates in his British Conchology, p. 13, vol. ii. Prof. King says 

 that (p. 110, note) he is not acquainted with any other Ancylo- 

 brach, in which the beak is not truncated for the foramen, except 

 Stringocephalus. It is, nevertheless, true that none of them 

 have it so truncated in the immature stages, as I have had many 

 opportunities of seeing, and the Professor apparently forgets 



