. Elementary text-book of zoology. Zoology. 380 iN ii])crture are two hook-shaped papilla?. The larva: are in part parasitic in the Cydippidce. Alrlopa, Cunt nti nil Delle Ch., Naples. Fam. Tomopteridae (Grymnwnjia'). Head well marked, two eyes,' bifid prasstomium, and four tentacles, of which two in many species are only present in the young. The mouth segment has two long tentacular cirri which are supported by a strong internal seta. The mouth is without proboscis and jaws. The segments are provided with large bi-lobed parapodia without seta?.. ToiHOjiti-rix xcoliyeHflra Kef., M
. Elementary text-book of zoology. Zoology. 380 iN ii])crture are two hook-shaped papilla?. The larva: are in part parasitic in the Cydippidce. Alrlopa, Cunt nti nil Delle Ch., Naples. Fam. Tomopteridae (Grymnwnjia'). Head well marked, two eyes,' bifid prasstomium, and four tentacles, of which two in many species are only present in the young. The mouth segment has two long tentacular cirri which are supported by a strong internal seta. The mouth is without proboscis and jaws. The segments are provided with large bi-lobed parapodia without seta?.. ToiHOjiti-rix xcoliyeHflra Kef., Mediterranean. T. nis Esch., northern seas, Heligoland. The genus Myzostoma F, 8. Lkt., a small group of hermaphrodite worms whose affinities are doubtful and disputed, may be placed here. They are small, disc-shaped animals, parasitic on Conn/tula. They possess a soft and ciliated skin, four pairs of laterally placed suckers on the ventral surface, and a protrusible proboscis fur- nished with papillse at their anterior end. also a branched alimentary canal which opens at the posterior end of the body. On the sides of the body are rive pairs of short parapodia, of which each one bears a hook (with one to three supple- mentary hooks) as well as supporting setre. As a rule, , double as many cirri or short wart-like protube- rances- are found on the margin of the body. M. ///(ihnim, clrriferum F. S. Lkt. D Sub-order 2. Seden- 'Ov taria = Tubicolse. * Fra. ; laris (after Claparede). a, The With indistinctly S6pa- aniiual removed from its tube, strongly magnified; rated head and short b, tube; T, tentacles ; Et, brood-pouch with oper- culum ; Dr, glands, Or, ova; Oe, oesophagus; 3f, usually not protl'USlble stomach ; A intestine. proboscis, without jaws. The branchire may be entirely absent and in many cases are confined to the two or three anterior segments following the head. In exceptional cases they are placed on the dorsal part of the middle of the body (Arenicoli
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
