On two Genera of Semiparasitic Polyzoa. 133 three intermediate ; tibias with two black rings at base, and the hinder portion obscure fuscous. The frontal lobe of pronotum is profoundly bilobed, the frontal tubercles of which are well developed, prominently-acute, and slightly directed forwards. The angles of the hinder lobe are rounded, where there is also an obscure tubercle and a longitudinal impression on each side. The abdomen is slightly dilated on each side. Long. 10 millims. ; lat. at pronot. ang. 2| millims. Eastern Garo hills, 1500 to 2500 feet. The most nearly allied form is C. picticeps, Stal. Reduvius mgrtcolltSj Dall. Arilus nigricollis, Dall. Tr. E. S. Lond. (2), i. p. 8, pi. ii. f. 5 (1850). Var. Posterior lobe of pronotum castaneous. Underside of abdomen with three or four transverse, lateral, shining black striae. Long, d, 12^ millims.; ?, 15 millims. (as described by Dallas from type). The Homopterous portion of the collection calls for little remark. It contained two new species, which I have already described, viz. Tosena splendida, Dist. Ent. Mo. Mag. vol. xv. p. 76 (1878), and Phymatostetha binotata, Dist. Trans. Ent. Soc. Lond. 1878, p. 322. XIII. — On Loxosoma a/i<iTriticella, Genera of Semiparasitic Polyzoa in the British Seas. By the Rev. A. M. Nor-man, M.A. Genus Loxosoma, Keferstein, 1862. Loxosoma phascolosomatum, C. Vogt. 1861. u Strephc ntcr us claviger, tentacular appendages of," Norman, Ann. & Mag. Nat. Hist. ser. 8, vol. vii. pi. ix. figs. 1-3. 1877. Loxosoma phascoloso malum, Carl Vogt, Archives de Zoologie Experinientale, vol. v. 1877, p. 305 ; translated by Hincks, Quart. Journ. Micr. Sci. n. s. vol. xvii. 1877, p. 353, pi. xxii. figs. 1-12; Barrois, Me*moire sur l'embryologie des Bryozoaires, p. 8, 9. In 1861, on examining a bottle of animals which had been dredged by me at Bantry Bay in 1858, I found a Gephyrean which was new to me. It was described in the ' Annals ' under the name Strephenterus claviger. Attached to the caudal extremity of this Gephyrean were
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