On two Genera of Semiparasitic Polyzoa. 133 
three intermediate; tibife 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 nigricollis , Dali, 
Arilus nigricollis , Dali. Tr. E. S. Loud. (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 
strife. 
Long, o, 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 aw^Triticella, 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 Strephenterits claviger, tentacular appendages of,” Norman, Ann. 
& Mag. Nat. Hist. ser. 3, vol. vii. pi. ix. figs. 1-3. 
1877. Loxosoma phascolosomatum , Carl Vogt, Archives de Zoologie 
Experimentale, 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, Mdmoire 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 1 Annals ’ 
under the name Strephenlerus claviger. 
Attached to the caudal extremity of this Gephyrean were 
