. 

 626 CLASS x. 



A. Anterior part of body elongate, contracted, resembling a neck. 

 Genera : Tracheliastes NORDM., Brachiella NORDM. 



B. Anterior part of body oval, 

 t Abdomen undivided. 



Genera : Lemceopoda BLAINV., Basanistes NORDM. 



Sp. Basanistes Huchonis V. KOLLAB, Ann. des Wiener Museums, I. Tab. x. 

 p. 86. (Tracheliastes stellifer KOLL. ibid. Tab. IX. figs, i 8, seems to 

 belong to genus Lernceopoda.) 



+ t Abdomen divided by segments. 





Achtheres NORDM. 

 Sp. Achtheres percarum V. NOBDMANN 1. 1. Tab. iv. 



B. Body not affixed by two arms. 



Chondracanthus DE LA ROCHE, Lernantoma BLAINV. Upper 

 antennae 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 Rochei Cuv. R. Ani. PI. xv. fig. 3 (does not differ 

 perhaps from Chondrac. gibbosus KBOETEB, i. PI. 2, fig. 4, pp. 252 257); 

 Chondracanthus Triglce NOBDM. 1. 1. PL 9, figs, i 4 ; Lerncea asellina L. 

 sec. KBOEYEB, 1.1. n. pp. 135, 136; Chondracanthis Lophii KATHKE, 

 Beitr. zur Fauna Norwegens. Tab. v. figs, n 18, &c. 



Clavella OKEN, KROEYER, (Habitus almost of Pem'cw?ws NORDM.) 



Lernanthropus BLAINV., Epachthes V. NORDM. Superior an- 

 tennaa sexarticulate. Three pairs of feet behind the rostrum. 

 Cephalothorax separated from abdomen by stricture. 



Sp. Lernanthropus pupa BDBM. 1. 1. Tab. xxiv. figs. 7 n ; Lernanth. para- 

 doxus, Epachthes paradoxus NOBDM., BUBM. ibid. fig. 12. 



Note. To this family perhaps is to be referred genus Staurosonia WILL, 

 not yet sufficiently known, androgynous in the opinion of the author, para- 

 sitic in Actiniae; see EBICHSON'S Archiv f. Naturgesch. 1844, PP- 337343- 

 Tab. x. figs, i 9. Add genera Tucca and Selius KBOEYEB, 1. 1. i. pp. 476, 

 479. The last genus is referred by the author to the Ergasilina. 



Myzostoma LEUCKART. (A genus, whose place is uncertain, 

 perhaps to be counted amongst the parasitic crustaceans.) 



