65 Gustavo Pulitzer-Finali Institute of Zoology, University of Genoa Via Balbi 5, 16126 Genova, Italia A COLLECTION OF WEST INDIAN DEMOSPONGIAE (PORIFERA). IN APPENDIX, A LIST OF THE DEMOSPONGIAE HITHERTO RECORDED FROM THE WEST INDIES The sponges here recorded belong to a collection I made in the years 1963 and 1964 in the Bahamas, Jamaica, the Dominican Republic and Puerto Rico. All the material has been collected by diving, at depths not exceeding 45 m. Each specimen has received a register number (R.N.) which refers to my files and preparations. Colours indicated as « C.C. » refer to Séguy's « Code Universel des couleurs ». The collection is being deposited at the Museum of Natural History of Genoa (msng). DEMOSPONGIAE HOMOSCLEROMORPHA HOMOSCLEROPHORIDA Plakinidae Plakortis simplex Schulze Plakortis simplex Schulze, 1880: 430 Occurrence. Duncans (Jamaica), fore-reef slope, depth 35-45 m, 30 March 1964. R.N. NC.12, NC.25. La Parguera (Puerto Rico), depth 0.5 m, mangrove, 3 May 1964. R.N. LP. 12. La Parguera (Puerto Rico), depth 25-30 m, 12 May 1964 R.N. SH. 5, SH.6. Boca Chica (Dominican Republic), depth 20 m, 12 April 1964. R.N. BC.34. NC.12: massive, large (only a fragment 7 X 3 X 2 cm collected). Consistency firm, slightly compressible, inelastic, easy to tear. Colour light reddish brown, interior tan; uniformly cream after preservation in formalin. Oscules few, presently contracted. Diactines 105-180 X 2.5-5.5 [xm, triactines very rare. NC.25: massive, lobate, large (only a fragment in the form of an elongated lobe 9 cm high and 3.5 cm in diameter was collected). Con-Annali Mas. Civ. St. Nat. G. Doria, Vol. LXXXVI
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