162 Dr. O^Bryen Bellingham on Irish Entosoa. 



Serpula proboscidea, Gm. Founded on two figures of Martini which 



I do not venture to explain. 



protensa, Gm. 



ech'mata, Gm. 



contortuplicata, L. 



decussata, Gm. Founded on Lister, t. 547. f. 4. (copied in 



Martini, 2. f. 17.) from Barbadoes, and is probably a Vermetus : I 



suspect that Dr. Grube has conceived under this name Vermetus 



subcancellatiis. Born. 

 Spirorbis nautiloidcs. Lam. 



EXPLANATION OF PLATE IlL 



Fig. A. The operculum of Serpula vermkularis, L. 



Fig. B, aspera, Ph. 



fig^ C, . subquadrangula, Ph, 



Fig. D, The operculum of Placostegus crijstalUnus, Sc. 



pjg^ E. ■ fimbriatus, D. Ch. 



Fig. F. The operculum of Vermilia trlquetra, Lam. 



piq^ Q, . iufundihidum, Gm. 



pig_ jj, .. davigera, Ph. 



pig^ J. calyptrata, Ph. 



fjg^ K. niidticristata, Ph. 



Pig^ Xi. cluiigata, Ph. 



Fig. M. ' qulnquelineata, Ph. 



pjg_ N, polytrema, Ph. 



^f^. O. emarginata. Ph. 



/^/^. P. The operculum of Pomatoceros tricuspis, Ph. 



pig^ Q. , Eupomatus nncinatus, Ph. 



jj'^rt R. pectinatits, Ph. 



i^j^. S. The operculum oi Spirorbis Cornii Arietis, Ph. 



Fig, T. The operculum of Vermilia triquetra, Blainv., according to the ' Diet, 

 d. Sci. Nat.' planches. From the description, it would he the oper- 

 culum of Serpida vermicularis. 



XIX. — Catalogue of Irish Entozoa, with observations. By 

 O^Bryen Bellingham, M.D,, Fellow of and Professor of 

 Botany to the Boyal College of Surgeons in Ireland, Member 

 of the Eoyal Zoological, Geological and Natui-al History So- 

 cieties of Dublin, &c. 



[Continued from vol. xiii. p. 430.] 

 Genus 13. Pentastoma. 

 (Derived from irevTe, quinque, and arofxa, os.) 

 Gen. Char. — Body flattened or slightly cylindrical. Mouth situated 

 between two pores upon each side, each pore having a hook-like 

 process projecting from it. The five orifices placed in a lunate 

 manner upon the head. 

 The genus Pentastoma is named so from the presence of five 

 pores upon the head, the central one being regarded as the 

 mouth. Budolphi separated it from the genus Polystoma with 



