626 CLASS X. 
A. Anterior part of body elongate, contracted, resembling a neck. 
Genera: TZ'racheliastes NorpM., Brachiella Norv. 
B. Anterior part of body oval. 
+ Abdomen undivided. 
Genera: Lerneopoda Buarnv., Basanistes NoRDM. 
Sp. Basanistes Huchonis V. Kouuar, Ann. des Wiener Museums, 1. Tab. xX. 
p. 86. (Zracheliastes stellifer Kou, ibid. Tab. 1x. figs. 1—8, seems to 
belong to genus Lerneopoda.) 
+ + Abdomen divided by segments. 
Achtheres NorpM. 
Sp. Achtheres percarum V. NORDMANN 1. 1. Tab. tv. 
B. Body not affixed by two arms. 
Chondracanthus Dr LA Rocun, Lernantoma Buatnyv. Upper 
antenne subulate, bi- or triarculate, inferior uncinate. Mouth in- 
ferior, remote from the anterior part of body, bordered by two 
hooks, scarcely prominent. Body with various lateral appendages 
bifid or ramose. External ovaries two. Conical tubercles in many 
in the mid line of the body, both dorsal and ventral. 
Sp. Chondracanthus La Rochet Cuv. R. Ani. Pl. xv. fig. 3 (does not differ 
perhaps from Chondrac. gibbosus Kronyer, I. Pl. 2, fig. 4, pp. 252—257); 
Chondracanthus Trigle Norpm. 1.1. Pl. 9, figs. 1—4; Lernea asellina L. 
sec. Kroryer, 1. 1. 1. pp. 135, 136;—Chondracanthis Lophit RATHKE, 
Beitr. zur Fauna Norwegens. Tab. v. figs. 11—18, &e. 
Clavella OKEN, Kroryer, (Habitus almost of Peniculus NoRDM.) 
Lernanthropus BuAINv., Epachthes V. NorpM. Superior an- 
tenne sexarticulate. Three pairs of feet behind the rostrum. 
Cephalothorax separated from abdomen by stricture. 
Sp. Lernanthropus pupa Burm. 1. |. Tab. xxiv. figs. 7—11; Lernanth. para- 
doxus, Epachthes paradoxus NorpDM., Burm. ibid. fig. 12. 
Note.—To this family perhaps is to be referred genus Stawrosonita WILL, 
not yet sufficiently known, androgynous in the opinion of the author, para- 
sitic in Actinie; see ER1cHSON’s Archiv f. Naturgesch. 1844, pp. 337—343- 
Tab. x. figs. r—g. Add genera Tucca and Seliws KROrYER, |. 1. 1. pp. 476, 
479. The last genus is referred by the author to the Zrgasilina. 
Myzostoma Levuckart. (A genus, whose place is uncertain, 
perhaps to be counted amongst the parasitic crustaceans.) 
