PORIFERA. 

 BY JAMES RANKIN, B.Sc., M.B., University, Glasgow. 



CLASSIFICATION : Hanitsch's " Eevision of the Generic Nomenclature and 

 Classification in Bowerbank's British Spongiadae" (Liverpool Mar. Biol. C. 

 Rep., vol. iv.). 



The reference letters have the following significance : 

 (C.)= Chopin, Manchester Micro. Soc. Trans., 1894. 

 (R.) = Dr. Robertson. 

 (H.)=Herdman ; P. R. Ph. S. K, vol. v. 



(M.) = MS. Records of Sponges collected by Sir John Murray's S. Y. 

 ' Medusa.' 



Class I. Calcarea. 



Leucosolenia botryoides, Ell. and Sol. ( = Grantia botryoides, Flem.}. Cum- 



brae : Lamlash, litt. c. (M.). 

 L. coriacea, Flem. ( = Ascetta coriacea, /Yem.).--Arran Basin (M.) : Cum- 



brae (C.) : Lamlash B. (H.). 



Sycon compression, Auctt. ( = Grantia compressa, Auctt.}. C. 

 S. coronatum, Ell. and Sol. ( = Grantia ciliata, Flem.}. C. 

 Leucandra nivea, Grant ( = Leuconia nivea, Grant}. L. Goil shore (M.) : 



Cumbrae (C.). 



Class II. Silicea. 



Halisarca Dujardini, Johns. U. L. Fyne, 55 f. on Inachus Dorsettensis (M.). 

 Stelletta Collingsi, Bwk. ( = Tethya Collingsi, Bwk.} Off Sanda 12 f. (M.). 

 Pachymatisma Johnston!, Bwk. Cumbrae (C.). 

 Pachychalina gracilenta. Buck. Under stones, Cumbrae (R.) : Mon. Br. 



Spong., vol. iv. 



P. limbata, Mont. ( = Chalina limbata, Bwk.}. L. Striven, 1. w. (M.). 

 Halichondria albescens, Johns. U. L. Fyne, E. and W. sides, and 



shore (M.). 

 H. fallaciosa, Bwk. ( = Hymeniacidon fallaciosus, Bwk.}. Clyde district. 



Mon. Br. Spong., vol. iv. 

 H. panicea, Pallas. C. 



var. papillaris. Upper L. Fyne, E. and W. sides and shore (M.). 

 H. reticulata, Bwk. ( = Hymeniacidon reticulatus, Bwk.}. Clyde district 



(Mon. Br. Spong., vol. iv.). 

 Reniera crassa, Bwk. ( = Isodictya crassa, Bivk.}. Clyde district (Mon. Br. 



Spong., vol. iv.). 



Esperiopsis sp.?- Off Skate I. 80-100 f. (M.). 

 Dendoryx incrustans, Esper. ( = Halichondria incrustans, Esper.}. Clyde 



district (Mon. Br. Spong., vol. iv.). 

 D. Patterson!, Bwk. ( = Halichondria Patterson!, Bwk.}. Clyde district (Mon. 



Br. Spong., vol. iv.). 



