. Annali del Museo civico di storia naturale Giacomo Doria. Natural history. 584 G. PULITZER-FIXALI evenly encrusting on smooth volcanic rock, with a uniform thickness of 1 to 2 mm, devoid of any outgrowth or irregularity. Oscules uniformly mm wide (in the dried state) with markedly elevated rim, 2 to 5 mm apart, give to the surface a \ery peculiar aspect. The con- sistency is fragile. The colour in life was greyish azure to yellowish; it is now reddish brown (about ). The ectosomal skeleton, quite distinct, is a tangential unispicular reticulation forming meshes irregularly tri
. Annali del Museo civico di storia naturale Giacomo Doria. Natural history. 584 G. PULITZER-FIXALI evenly encrusting on smooth volcanic rock, with a uniform thickness of 1 to 2 mm, devoid of any outgrowth or irregularity. Oscules uniformly mm wide (in the dried state) with markedly elevated rim, 2 to 5 mm apart, give to the surface a \ery peculiar aspect. The con- sistency is fragile. The colour in life was greyish azure to yellowish; it is now reddish brown (about ). The ectosomal skeleton, quite distinct, is a tangential unispicular reticulation forming meshes irregularly triangular, with no apparent spongin. The main tracts of the choanosomal skeleton are paucispicular, with single connecting spicules rather irregularly disposed. Spongin is scarce. Spicules. Oxeas slightly curved, with generally elongate and sharp points, measuring for the most part 60-100 x [im. There are also oxeas of the same type, measuring 130-170 [im, same thickness. They are not frequent, but appear proper. 40 pm. Fig. 75 - Spicules of Adocia cribrata sp. n. Orina angulata (Bowerbank) Halichondria annidata Bowerbank, 1866: 233 Occurrence. Portofino, Vessinaro, depth 50 m, detrital, boulders, trammel, 4 April 1965. Portofino, Altare, depth 50-70 m, detrital, boulders, trammel, 18 September 1965. RivaTrigoso, depth 33 m, bouldeis, diver, 30 October 1970. , , Bari, depth 15 m, conglomerates, dredge, 17 June 1970. Porto Tricase, depth 23 m, conglomerates, dredge, 18 October 1967. Porto Tricase, depth 15-30 m, conglomerates, di\er, 22-24 September 1970. , Description. All the specimens, very small, have been entirely used for spicule preparations. According to field notes, they were soft, viscous, from cream to light brown, often with digitate pro- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabilit
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