. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 258 Bulletin of the Museum of Comparative Zoology, Vol. 159, No. 5. Figure 13. Cellaria louisorum. Hassler Box 3. MCZ 100120. A. One branch intemode. Scale bar = 500 ^m. B. Close-up of proximal end of internode showing avicularium and zooids. Scale bar = 100 |am. C. An autozooid. Scale bar = 100 (xm. D. Close- up of an avicularium. Scale bar = 50 |im. E. Close-up of orifice, showing beaded distal rim, curved proximal rim, and rounded condyles. Scale bar = 20 |im. F. Fertile zooid, showing ovicell foramen and
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 258 Bulletin of the Museum of Comparative Zoology, Vol. 159, No. 5. Figure 13. Cellaria louisorum. Hassler Box 3. MCZ 100120. A. One branch intemode. Scale bar = 500 ^m. B. Close-up of proximal end of internode showing avicularium and zooids. Scale bar = 100 |am. C. An autozooid. Scale bar = 100 (xm. D. Close- up of an avicularium. Scale bar = 50 |im. E. Close-up of orifice, showing beaded distal rim, curved proximal rim, and rounded condyles. Scale bar = 20 |im. F. Fertile zooid, showing ovicell foramen and wider orifice. Scale bar = 50 |im. Description. Colony encrusting and small in size, often heavily fouled or partly overgrown (Fig. 14A). Zooids small, more or less oval in shape. Frontal walls com- posed of five to eight pairs of well-defined, rounded, radiating costae, separated by evenly spaced pores. The first set of costae is sometimes thicker than the following costae and may show a bifid median umbo (Fig. 14C). Orifice semicircular with six hollow spines surrounding its distal and lateral rim (Fig. 14D). Avicularia with oval zooids covered by smooth calcification, a flaring calcified rostrum, and a subtrian- gular, paddle-shaped mandible, are found between zooids, especially at growing edges of colonies. Ovicells imperforate, helmet-shaped, with a central-frontal thickening. Measurements Range Mean N Lz 12 Wz 12 Lo 11 Wo 12 Lov 3 Wov 3 Lav 12 Wav 12 Notes. Despite abrasion and fouling of the fragmentary Hassler Barbados specimens, their distinguishing specific characters are clear. So far six Puellina species have been described from the tropical Western Adantic, all distinguishable by a combination of size (zooid length) and other characters. Puellina smitti is the only one of them with flabellate avicularia. The only other spec
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