1056 



MANUAL OF DETERMINATIVE BACTERIOLOGY 



kaiserl. Gesundheitsamte, 30, 1909, 379; 

 Bergey etal., Manual, 1st ed., 1923, 423.) 

 From Latin, of a mussel. 



Spirals: 0.5 to 3.0 by 10 to 60 microns, 

 round in section with blunt ends, the 

 one being slightly more pointed than the 

 other. 



They have a ridge or comb running 

 along one side but no terminal filaments. 



Cross-striations distinct. 



The chromatin grarmles are grouped 

 in fours. 



An undulating membrane can be dem- 

 onstrated. 



Source : Found in the intestinal canal 

 of the scallop (Pecten jacobaeus) . 



Habitat: From the crystalline style of 

 molluscs. 



Appendix: Additional species which ap- 

 pear to belong in this genus are : 



Cristispira acuminata (Schellack) 

 Ford. {Spirochaeta acuminata Schel- 

 lack, Arb. kais. Gesundheitsamte, 30, 

 1909, 379; not Spirochaeta acuminata 

 Castellani, Brit. Med. Jour., 2, 1905, 

 1330; Ford, Textb. of Bact., 1927, 939.) 

 From the crystalline style of a mollusc. 

 Tapes laeta. 



Cristispira cardii-papillosi (Schellack) 

 Ford. {Spirochaeta cardii-papillosi 

 Schellack, Arb. kais. Gesundheitsamte, 

 30, 1909, 379; Ford, Textb. of Bact., 1927, 

 939.) From the crystalline style of a 

 mollusc, Cardium papillosum. 



Cristispira chamae (Schellack) Nogu- 

 chi. {Spirochaeta chamae Schellack, 

 Arb. kais. Gesundheitsamte, 30, 1909, 

 379; Noguchi, Jour. Exp. Med., 27, 1918, 

 583.) From the crystalline styles of 

 molluscs, Chama spp. 



Cristispira gastrochaenae (Schellack) 

 Ford. {Spirochaeta gastrochaenae Schel- 

 lack, Arb. kais. Gesundheitsamte, SO, 

 1909, 379; Ford, Textb. of Bact., 1927, 

 940.) From a shellfish, Gastrochaena 

 dubia. Constant length 29 microns. 



Cristispira helgolandica Collier. 

 (Cent. f. Bakt., I Abt., Orig., 86, 1921, 

 132.) Found three times in the body 



fluid of an echinoderm, Asterias rubens, 

 in the North sea. Average length 68 

 microns. Named for the place where the 

 investigation was made (Helgoland). 



Cristispira interrogationis Gross. (Mit- 

 theil. Zool. Station zu Neapel, 20, 1910, 

 41.) From the intestinal canal of the 

 scallop, Pecten jacobaeus. 



Cristispira limae (Schellack) Ford. 

 {Spirochaeta limae Schellack, Arb. kais. 

 Gesundheitsamte, 30, 1909, 379; Ford, 

 Textb. of Bact., 1927, 939.) From the 

 crystalline styles of molluscs, JAma spp. 

 Similar to Cristispira balbianii. 



Cristispira mactrae (Prowazek) Ford. 

 {Spirochaeta mactrae Prowazek, Arch. f. 

 Schiffs- u. Tropenhyg., 14, 1910, 297; 

 Ford, Textb. of Bact., 1927, 940.) From 

 the digestive tract of a shellfish, Mactra 

 sulcataria. 



Cristispira mina Dimitrofi'. (Jour. 

 Bact., 12, 1926, 159.) Found in oysters. 



Cristispira modiolae (Schellack) Nogu- 

 chi. {Spirochaeta modiolae Schellack, 

 Arb. kais. Gesundheitsamte, 30, 1909, 379 ; 

 Noguchi, Jour. Exp. Med., 27, 1918, 583.) 

 Found in mussels and oysters. 



Cristispira ostrcae (Schellack) Nogu- 

 chi. {Spirochaeta ostreae Schellack, Arb. 

 kais. Gesundheitsamte, 30, 1909, 379; 

 Noguchi, Jour. Exp. Med., 27, 1918, 583.) 

 From the crystalline style of the oyster, 

 Ostrea edulis. Identical with Cristispira 

 anodontae Gross. 



Cristispira pachelabrae de Mello. 

 (Compt. rend. Soc. Biol., Paris, 84, 1921, 

 241 .) From the digestive tract of a shell- 

 fish, Pachelahra moestra. 



Cristispira parvula Dobell. (Arch. f. 

 Protistenk., 26, 1912, 117.) From the 

 crystalline style of a mollusc, Venus 

 {Meretrix) castra, in Ceylon. The small- 

 est Cristispira known — 0.4 to 0.5 by 20 to 

 45 microns. 



Cristispira pectinis Gross. (Mittheil. 

 Zool. Sta. zu Neapel, .20, 1910, 41.) From 

 the digestive tract of a scallop, Pecten 

 jacobaeus. Identical with Cristispira 

 balbianii Gross. 



Cristispira polydorae Mesnil and Caul- 



