VERMES. 117 



cylindrieum oblique percurrens. Denticulus fub cauda. Ripjdior hcec 

 cceteris omnibus iui generis; formam optime fervar in Sp. V. & in 

 vino combufto. Una mercurio repleta & ficcata , formse vefrigia pri- 

 nn optime retinuit exculio mercurio. Cohcerent focietate mira: 

 dorfum dorfo obverfum ; ita tamen, ut una adhtereat duobus dimidiis 

 doriis aliarum. Sic ora ornnia exrrorfum ipe&anr. Srcpe plurium ul- 

 narum funiculo fociali ferpentum more ie voivunt.; dum venrriculi 

 fyftole & diaftole aquam transmitrunt , fluminis inftar, per longam hanc 

 feriem ; & hac arte refpublica natat. 



Extra fretnm Gaditanum. 



P 3 42. PTERO- 



1 



t 





» 



PTEROTRACHEA. 



41. PTEROTRACHEA coronata; ventre caudaque pinniferis^ capitis pro- 

 bofcide tereti , perpendicularij frontis coronula aculeis decem. 



Descr. Corpus fubteres : cralTitie pollicis : longirudine fere fpithamae. Ca- 

 put antice rotundatumj coronula in fronte fpinis 10. conicis : harum 

 tres" utrinque conftituunt lineas medias perpendiculares : exrra illas fu- 

 perne utrinque duse , una fupra alteram. Infra coronam Probofcis de- 

 pendet , fere duos pollices longa, nervo medio & apice in capitu- 

 lum incrailato , albido: ore terminali. Apex hyalinus: & tota probo- 

 fcis gelatina farta videtur: fub illa macutae albidse, parvae, fparfie in- 

 terdum. Oculus uterque ad nucham interne prope marginemj hinc fa- 

 tis ab invicem remoti ; conflant macula ovali , transverfa, fufca ; cui in- 

 trorfum imponitur infundibulum , feu conus inverfus, obfcure teftaceus; 

 recipiens fphsrulam hyalinam, iimilem bulla? aerea? Truncus ab ocu- 

 lis ad caudam fere cylindricus; pone fuperne rotundatus, nec nifi bafi 

 cum cauda conjunctus , laevis, immacularus: inferne juxta pinnam albo- 

 maculatus : abdomen fubtus torum afperum. Ante pinnam Sacculus 

 duplex, an gula? ovatus, pendulus, hyalino- maculatus. Anus proxi- 

 me fupra ligamentum cauda?. In quibusdam fupra anum in exrremo 

 trunco nucleus globofus, albidus, lente minor. Cauda verticalis , pol- 

 licaris; anrice , fed inferius longo collo adnara rrunco ; ca?terum rrian- 

 gularis, urrinque lineis 4, aculearis; angulato - fcabra, t:rminata pinnu- 

 la utrinque horizontali, fsmicordara , cauda quarer breviore, prominen- 

 te ultra caudae apicem ; ubi margine incumbit margini cauda?. Piima 

 pone medium rrunci , orbicularis, diametro ' pollicis , compreiTa, bafi 

 incrjifata, laminisque trunci albis utrinque crenatis, affixa. Subtus in 

 ir.argine pinnula alia, campanulata, puntto medio aflixa, hyalina, 



ln Mari Mediterraneo & Archipetago, 



* 



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