102 MR. T. DAVIDSON ON JAMAICAN BRACHIOPODA. [Feb. 13, 



the late Mr. Beattie of Montrose, in regard to the Lineus longis- 

 simus, in the Society's 'Proceedings' for 1858 (p. 307). The 

 specimen there referred to is now in the collection of the British 

 Museum. We have a specimen also, in the same collection, of the 

 Serpentaria fragilis, belonging to the collection of " non-parasitical 

 Worms" of the late Dr. Johnston, which, according to the usual 

 habit of these Worms, is broken into many pieces, and in which this 

 tube or alimentary canal appears partly detached and partly remain- 

 ing fixed in the body of the Worm. The case under notice at pre- 

 sent is the third instance which has occurred to me of this curious 

 fact. Capt. Berry, having seen the Worm vomit forth the whole 

 tube, considered the expelled part an Entozoon ; whilst Mr. 

 Beattie, in his case, looked upon it as the young of the Lineus, thus 

 making these animals to be viviparous. Diesing, in his ' Systema 

 Helminthum,' mentions two genera in which this circumstance oc- 

 curs, and quotes two species in which, he says, " tubus cibarius 

 totus interdum expellitur." In all probability it is a circumstance 

 which is common to all the species of the genera Lineus, Meckelia, 

 and Serpentaria. 



6. Notes on some Recent Brachiopoda dredged by the late 

 Lucas Barrett off the North-east Coast of Jamaica, and 

 now forming part of the Collection of Mr. R. MacAn- 

 drew. By Thomas Davidson, Esq., F.R.S., F.G.S., &c. 



(Plate XII.) 



During his residence in Jamaica the late Lucas Barrett dredged 

 several new and interesting small species of Brachiopoda, which he 

 brought to England in 1862, and placed in the hands of the late 

 Dr. S. P. Woodward for description ; but, alas! owing to that natu- 

 ralist's state of health, this task was never accomplished. In May 

 1864 Dr. Woodward requested me to describe and figure a new and 

 very remarkable species of Thecidium, which formed part of the little 

 series above mentioned ; and more recently Mr. R. MacAndrew 

 has deposited the whole collection in my hands for description. 

 I will therefore briefly allude to the species already known, and give 

 descriptions of those that are new to science. 



The Brachiopoda found by Mr. Barrett seem to belong to five 

 species, of which three are new. 



1. Terebratulina caput-serpentis ? 



Some seven examples were dredged on the north-east coast of 

 Jamaica, at depths of 60 and 150 fathoms ; but as none of the spe- 

 cimens exceeded two lines in length and were very young shells, it 

 is not possible to say with certainty whether the full-grown shell 

 may not have presented peculiarities which would have distinguished 

 it from Linnaeus's well-known and far-spread species. 



