MOLLUSCA OF MICHIGAN— WALKER. 



497 



Genus PHlLOflYCUS (Rafinesque) Ferussac. 



Animal limaciform. Body somewhat flattened, terminating obtusely or 

 in a somewhat trmicated form, obtuse anteriorly. Back convex, more flat, 

 when fully extended. Integuments with irregular vermiform glands, anas- 

 tomosing with each other and having a general longitudinal direction. Man- 

 tle covering the whole body. Foot expanded at its margin and visible be- 

 yond the edges of the mantle. No locomotive disk. Respiratory orifice 

 near the head, some way to the rear of the right eye-peduncle. Anal orifice 

 contiguous to and a little above and in advance of the pulmonary orifice. 

 Orifice of organs of generation behind and below the right eye-peduncle. 

 No caudal mucus pore. No external or internal shell. 



Jaw horn-colored, arcuate, with irregular concave margin, 

 .bearing a blunt slightly projecting beak; terminations blunt; the 

 'anterior surface convex, without a decided median carina, an- 

 ^Rmroiimnsti terior surface smooth. 



(Binney.) ' Liugual membrane arranged as usual in Helicidce, long and 

 narrow; centrals ^dth a long narrow base of attachment, widening toward 

 the lower margin, which is excavated, unicuspid; laterals like the centrals, 

 iDUt asymmetrical; marginals quadrate, longer than wide, obtusely bicuspid. 



Fig. 95. Dentition of P. carolinensis. (Binney.) 

 PHILOHYCUS CAROLINENSIS (Bosc). 

 Body elongated, subcylindrical, flattened towards its posterior extremity, 



Fig. 96. P. carolinensis. (Binney.) 



which is obtuse; eye-peduncles short, stout, terminating in a bulb; tentacles 

 immediately below, very short, nearly conical; mantle fleshy, covering the 

 whole body, surface longitudinally rugose; color above whitish or yellov^ish- 

 white, varigated with clouds and spots of brownish and blackish, so arranged 

 as to form three ill-defined longitudinal bands, inferior margin white or 

 yellowish; foot whitish, extending a little beyond the mantle posteriorly, show- 



