. Bulletin - United States National Museum. Science. 314 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM of its length rather more than half the prostomial diameter. The terminal half narrows gradually to a moderately sharp point. Prom- inent dark-brown spots occur on the tentacles, tentacular cirri, and palps. The protruded pharynx is 8 mm. long. Above and below on its terminal margin on either side of the mid line there is a row of six. papillae. Dorsally the mid line is marked with a more prominent papilla. A smaller one lies in a corresponding position on the mid- ventral line. Brown spots si
. Bulletin - United States National Museum. Science. 314 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM of its length rather more than half the prostomial diameter. The terminal half narrows gradually to a moderately sharp point. Prom- inent dark-brown spots occur on the tentacles, tentacular cirri, and palps. The protruded pharynx is 8 mm. long. Above and below on its terminal margin on either side of the mid line there is a row of six. papillae. Dorsally the mid line is marked with a more prominent papilla. A smaller one lies in a corresponding position on the mid- ventral line. Brown spots similar to those on the head appendages occur on the papillae. In each of the upper and lower jaws are two sharp-pointed, strong, light-brown teeth. Dorsally and ventrally the central longitudinal areas of the body are sharply differentiated from the lateral by two longitudinal muscle bands, which are more widely separated from each other. Figure 1.—Macellicephala maculosa, new species: a, Head, X 1V-2 ; o, fifteenth parapodium, X 17%; c, d, e, various types of dorsal setae, X 250; /, neuropodial seta, X 250; g, anterior stout seta, X 250 ventrally than dorsally. The first pair of elytra are large enough to> overlap dorsally and completely cover the head. Actually, in this preserved specimen, they are thrown forward so as to leave the head uncovered, and their anterior margins extend to the middle of the length of the palp. The second pair are smaller, and this decrease in. size continues in later somites, so that in the region of the twenty- fifth they barely reach to the margin of the dorsal muscle band. They are all very thin and transparent, especially the posterior ones, which are quite invisible until lifted on the point of a needle. They are oval in outline, with smooth margins and no noticeable surface markings. The anterior somites are closely crowded together, and the para- podia are nearly as long as the somites. This is doubtless due to contraction in preservatio
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
