ASCARIS OSCULATA. 



153 



(luodaiuinodo conveuiiiiit. Corpus utriiKiUc subatteimatum, aiitrosiiiii IV^rc tcnuius. Cauda brovis- 

 siiiia acuta. Genitalia feiniuae lit in reliqnis ; maris duplo niinoris spicula exserta iiou vidi. Tubus 

 cibarius pro more. 



Obs. 1. Vermes phocae ante biduiim occisae vividissimi, vasculo a(iuae lepleto et fuiuo (mane et 

 modice tantuin calefacto) imposito comtnissi, nyctbemeron, 36 boras et ultra vixere. 



Obs. 2. CI. Hellwig specimen a cl. quondam Wewctzer, Med. Cand. in Pboca vitulina, ncscio quo 

 loco, repertum mecum communicavit, meis duplo majus, crassiusculum, cujus pars i)08tica anteriore 

 omnino crassior est, ceterum vero, quantum in verme uiortuo conspiceve licet, buc pertinere videtur, 

 ut Ascaris nostra forsan ad sectiouem quintam amandanda sit. 



Later (1819, pp. 39, and 651-652) he mentions that it was at Greifswald that he 

 found his specimens j that Bakker found specimens which were larger than his, and 



Fig. 77. 



Fig. 76. 



Fig. 78. 



that Bremser found specimens in Phoca groenlandica, of which the male was 15, the 

 female 18 to 24 lines long. In describing the worms, Eudolphi adds: 



Caput valvulis majusculis marginatis, siiborbicularibus, a quibus nomen desumsi, instructum. 

 Corpus posteriora versus minus atteuuatum; cauda crassa, maris inflexa, apico brevissimo acuto, ante 

 quem spicula duo longissima, incurva; cauda feminae recta obtusa cum brevissimo et tenui apice 

 acuto. Membrana lateralis in apice colli latior obtusiuscula, turn tenuis decurrens, brevi tenuissima 

 et fere iavisibilis. 



Specimina mea pusilla comparavi, et horum quoque reperi, quibus pars posterior crassior est, 

 reliqua conveniunt. 



Bellingham (1844, p. 169) mentions the presence of A. oscxdata, in the oesophagus 

 and posterior nares of Phoca vitulina., but makes no further observations on the species. 



Dujardin (1845, p. 164) takes his description from Eudolphi (1809 and 1819) and 

 does not appear to have seen this form. Diesing (1851, p. 169) adds nothing in the 

 way of anatomical characters, but gives several additional hosts, namely, Phoca pan- 

 therina [ = ■?], P. gryphus { = Halichocrus (jrypus)., P. hispifJn (=P. foetirla), P. harhata 

 {=Erignathus barbatiis), and P. monachus {—Monachus alMventer). 



