. Bulletin - United States National Museum. Science. ASCIDIANS OF TITE PHILIPPINES VAN NAME. 105 Locality of the only specimen, No. 46 (Cat. No. 5959, ) : Station D5141 (off Jolo Light, 29 fathoms, coral sand, Feb. 15,1908). The type and only specimen of Sluiter's species was from Salibabu Island (reef). According to his description the internal longitudinal vessels are considerably less numerous than in the Philippine speci- men; possibly he may have made the count on a smaller and less mature zooid. Genus EUSYNSTYELA Michaelsen, 1904. EUSYNSTYELA LATERICIUS (Sluiter). 1904. Plate 2G,
. Bulletin - United States National Museum. Science. ASCIDIANS OF TITE PHILIPPINES VAN NAME. 105 Locality of the only specimen, No. 46 (Cat. No. 5959, ) : Station D5141 (off Jolo Light, 29 fathoms, coral sand, Feb. 15,1908). The type and only specimen of Sluiter's species was from Salibabu Island (reef). According to his description the internal longitudinal vessels are considerably less numerous than in the Philippine speci- men; possibly he may have made the count on a smaller and less mature zooid. Genus EUSYNSTYELA Michaelsen, 1904. EUSYNSTYELA LATERICIUS (Sluiter). 1904. Plate 2G, fig. 9. 1904. Gynandrocarpa latericius Sluiter, Stbo»«.-Exped., vol. 56a. p. 94, pi. 15, figs. 8-11. 1909. Polyandrocarpa latericius Hartmkyer. Bronn's Tier-reieh, vol. 3, suppl., p. 1370. Colony flat and expanded, averaging about 3 mm. thick, the upper surface fairly smooth and free from adhering material, but raised into low, distinctly bordered, rounded elevations of ellipti- cal outline when seen from above. Each of these elevations, which are usually quite close together, is caused by the body of a zooid and bears upon its surface the two apertures of the zooid, w h i c h are raised on low flat- tened conical papil- lae, the branchial near the anterior end of the zooid, the atrial far back on the dorsal surface. The branchial aperture is distinctly square, the atrial is more nearly round. Dimensions of the largest colony 108 mm. by 51 mm.; length of body of largest zooids mm., width mm. Test very tough and leathery; yellowish white, thick between and beneath the zooids, but thin over them. Under magnification minute furrows are visible on the portion over the zooids, some radi- ating from the apertures, others having a elliptical course parallel and concentric with the outline of the body. Owing to the tough character of the test, vascular connections between the zooids, though doubtless present, were not successfully PlGS. 58-60. EUSYNSTYELA LATERICIUS
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