186 REPORT OF THE COMMISSIONER OF PtSH AND FISHERIES. 



16. Genus et sp. incert. 



Psorosperios of Gohiits HuvialiUx, Leydig, 1851, Miiller's Archir., p. 223, uame 

 only; ib. of Gohio [error] JlurtatUis Ludwig, 1888, Jabresber. d. rliein. 

 Fiscb-Vereius, 1888, p. 30. 

 HnUtat. — Body cavity of Gohius fluviatiUs L.' (goby). 



17. Genus et sp. incert. 



Psorosperm of crocodile, Solger, 1877, Jabresber. scbles. Gesellsch. f. Vaterl. 

 Cultnr, Liv, p. 45. 

 Name only, with statement that it will be fully described elsewhere. 

 Habitat. — In mucosa and muscularis of intestinal canal of " croco- 

 dile." 



18. Genus et sp, incert. 



Psorosperm of Chondrostoma iiasus, Leydig, Miiller's Arebiv., 1851, p. 222. 



No description or figure. 



Hahitat. — Cysts in roots of tongue of Chondrostoma nasus L. 



19. Genus et sp. incert. 



PsorosperiBS of Leuciscus ruiilus, Leydig, Miiller's Arebiv., 1851, pp. 222-3. 



No description or figure. 



Habitat. — White clumjis of " psorosi^erms " in the heart (auriculo- 

 ventricular valve) of Leuciscus rutilus; also in heart blood of same fish. 



20. Genus et sp. incert. 



Psorosperms of Cypvinus tinea, Lieberkiibn, 1854, Bull. Acad. Roy. Belg., xxi, 

 pt. 2, p. 22. 

 No description. 

 Hahitat. — Scales of Tinea tinea L. (tench). 



21. Genus et sp. incert. 



Psorosperms of C'^/jprmMs er7/</;roj;/(/7(«?w»s, Lieberkiibn, 1854, Bull. Acad. Roy. 

 Belg., XXI, pt. 2, p. 22. 



Mention of occurrence only; no description. 



Habitat. — Subsquainous, on Leuciscus {Seardinius) erythrophtludmuH. 



22. Genus et sp. incert. 



Psorosperms of Gaslrrosfeus aculeatus, Hensen,- in Wittmack, 1875, Beitrilge 

 z. Fiscberei-Statistik d. deutscb. Reicbs, p. 190. 



Mention only; no description. 



Habitat. — On Gasterostens aculeatus L, (stickleback) near Kiel. 



23. Genus et sp. incert. 



Psorosperms of Lucioperca sandra, Heckel & Kner, 1858, Die Siisswasserfiscbe 

 der (istreicbiscbe Monarcbie, Leipzig, p. 12; ib. Wittmack, 1875, Beitriige 

 z. Fiscberei-Statistik d. deutscb. Reicbs, p. 190. 



Heckel and Kner say: 



Their gills are often beset witb small cysts filled witb a gelatinous fluid (tbe so- 

 called psorosperms) and in tbis condition tbey are regarded as unfit for food. 



'Tbe great similarity of uame between tbe present fi.sb aud GoMo flurialilis, and 

 the presence of a species upon tbe latter in tbe same situation (body cavity, see p. 

 243) suggests tbe possibility of an ortbograpbic error. 



2 In response to an in(iuiry,Dr. Wittmack kindly informed me that Prof. Heuseu's 

 observation is unpublished, having been made upon a statistical question sheet. 



