Sampled and identified by G. Pulitzer-Finali. All measurements are of mature, fully formed fistular oxeas, i.e. comparison only possible with other samples from fistules. Measurements conducted by C. Schönberg on preparation of acid-cleaned spicules made by B. Calcinai. Data are sorted vertically by spicule width.; Pulitzer-Finali, Gustavo (1986) A collection of West Indian Demospongiae (Porifera). In appendix, a list of Demospongiae hitherto recorded from the West Indies. Annali del Museo Civico di Storia Naturale Giacomo Doria die Genova 86: 65-216 (MSNG 47097: pp. 164-165).